Hearing Protection
At Phonak we are serious about protecting hearing. Our wide range of in-ear hearing protection systems features solutions for every type of user operating in every type of noise environment – from industrial plant workers who require protection with radio or phone communication, to aircraft pilots who fly in constant loud noise, and hunters looking to reduce the in-ear volume of gun shots while retaining full ambient awareness.
PASSIVE
Our passive (or 'static') systems are designed for use in continuous loud noise. Serenity SP is fully modular, enabling the user to click their ear shells into other Serenity products. Serenity Classic is designed for rugged use, while Silemo Mini suits offices and clean workplaces.
LEVEL-DEPENDENT
Serenity DP is a dynamic or ‘active’ system that features level-dependent protection. This technology monitors the surrounding noise and adjusts the system’s noise reduction (attenuation) accordingly, making it ideal for fluctuating noise environments.
WITH COMMUNICATION
If you require hearing protection and radio or phone communication, Phonak has the system for you. Primero DPC is our premium product for use in extreme noise. Serenity DPC features level-dependent protection with radio/ phone connectivity. Serenity SPC suits those who work in continuous loud noise.
FIT TESTING SYSTEM
SafetyMeter is Phonak’s proprietary fit testing system, designed to ensure that users of Serenity in-ear hearing protection receive and continue to receive exactly the protection they require over time.
Primero DPC+ high noise headset
Primero DPC+ is Phonak’s breakthrough radio headset with dynamic (active) level-dependent hearing protection, for use in the very loudest environments. Now featuring plus-level (+) technology for enhanced listening comfort.
Instead of featuring a face-worn boom microphone, Primero DPC+ employs a miniature microphone (situated within its ear shell’s earJack component) and an innovative signal processing algorithm that together pick up the user’s voice from inside the ear canal.
The result? The system can operate effectively in noise of up to 115dB (the same level as the loudest rock concert), while ensuring that the surrounding sound is never sent to the radio listener.
Thanks to Primero DPC+’s level-dependent attenuation (in-ear noise reduction), the user’s ears are only protected when sound levels reach dangerous levels, allowing natural directional hearing at quieter times.
- High noise headset with level-dependent protection
- Automatic attenuation of dangerous sounds including ‘impulse’ noises (i.e. shots and crashes)
- Transmission of speech, not surrounding noise
- Natural hearing at quiet times (with adjustable ambient volume)
- Custom-molded in-ear eShells (generic version also available)
- Fully modular (click out eShells to swap between Phonak Serenity systems)
Primero DPC+ – extreme noise, natural communication.
A closer look at Primero DPC+’s technical specifications.
| Maximum volume of in-ear speaker (no radio signal) |
82(+/-2) dB(A) free field equivalent |
| Volume control range of ambient sound (8 levels) | -15 dB to +6 dB(A) vs. natural hearing |
| Maximum volume of in-ear speaker (with radio signal) | 91(+/-2) dB(A) free field equivalent |
| Maximum surrounding noise level for voice pick-up operation | 115(+/-2) dB(A) free field equivalent |
| Power supply |
radio or internal LR03 (AAA) battery |
| Radio supply voltage | 3.3 V – 24 V |
| Battery life | 200 h (system not connected to a radio) |
| System weight | 90 g / 3.17 oz |
| Operating temperature range | -20°C to +60°C |
| Housing IP rating | IP54 |
| Cable pull force | 50N |
| Connector open force | 8 – 16 N, 4000 cycles |
| Neck cord snapper opening force |
12 – 25 N, 4000 cycles |
| Standards | EN 352-7/EN 352-2/EN 55022/EN 55024 |
| Radio connectors | available for most professional radios |
Phonak eShells
‘eShells’ are Phonak’s custom-molded in-ear shells. Offering the best hearing protection for full-time workers who operate in noisy environments, eShells are durable hollow molds made from clinical nylon.
They are produced using a computerized 3D version of the user’s individual ear impression, which is taken beforehand by a hearing technician (a process that takes just 5 minutes).
When a Serenity or Primero DPC+ system’s earJack is clicked into an eShell (see above left), the ear is instantly and fully sealed. Only sounds that have then been attenuated (reduced) by the user’s Phonak system reach the ear drum; protecting the user from dangerous noise throughout the day.
- 100% individualized hearing protection
- Perfect in-ear fit
- Highly robust & machine washable
- Quick and cost-efficient reproduction
- Easy to maintain and assess using SafetyMeter
Generic ear shells are also available. These one-size-fits-all versions are ideal for temporary or part-time use. Contact us for more details.
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Serenity DPC+ hearing protection with radio/phone communication
Serenity DPC+ combines electronic level-dependent hearing protection with a sturdy integrated radio/phone communication headset. Now featuring plus-level (+) technology for enhanced listening comfort.
This system best suits users who work in fluctuating loud noise environments but still demand clear two-way radio or cellphone/cordless phone communication with colleagues, including staff who work at heavy industry plants, rescue teams, firefighters, airport workers and more.
In short, Serenity DPC+ combines the intelligent attenuation (in-ear noise reduction) offered by Serenity DP+ with your choice of portable two-way radio or phone compatibility.
- Dynamic hearing protection with radio/phone communication
- Automatic attenuation of dangerous sounds including ‘impulse’ noises (i.e. shots and crashes)
- Transmission of speech, not surrounding noise
- Natural hearing at quiet times (with adjustable ambient volume)
- Easy localization of warning signals
The Serenity DPC+ hearing protection system is fully modular, meaning its ear shells can easily be unclicked and used with in any other Serenity system (except Serenity Classic).
A closer look at Serenity DPC+’s technical specifications.
| Weight |
113 g / 3.98 oz |
| Marking | unique user ID on each eShell |
| eShells | custom-molded clinical nylon |
| Passive attenuation | SNR = 24 dB (electronic attenuation switched off) |
| Level-dependent attenuation |
High: 108 dB / Medium: 105 dB / Low: 99 dB |
| Max. volume at ear speaker | 83 (± 2) dB(A) free field equivalent |
| Max. volume of radio signal at ear speaker | 91 (± 2) dB(A) free field equivalent |
| Attack / release time |
0 ms / 200 ms |
| Volume control range | -15 dB to +12 dB vs. natural hearing |
| Boom microphone | electret, close talk, noise canceling, used on left or right eShell |
| Microphone sensitivity | -44 (±3) dB re. 1 V/Pa @ 1 kHz |
| Power consumption from radio | typical 10 mA @ 5 V / max. 30 mA @ 5 V |
| Radio supply voltage |
2.6 V – 28 V |
| Operational temperature range | -20°C to +60°C |
| Electromagnetic compatibility (EMC) | EN 55022, EN 55024 |
| Inflammability |
EN 13819-1 ch5.6 |
Phonak eShells
‘eShells’ are Phonak’s custom-molded in-ear shells. Offering the best hearing protection for full-time workers who operate in noisy environments, eShells are durable hollow molds made from clinical nylon.
They are produced using a computerized 3D version of the user’s individual ear impression, which is taken beforehand by a hearing technician (a process that takes just 5 minutes).
When a Serenity or Primero DPC+ system’s earJack is clicked into an eShell, the ear is instantly and fully sealed. Only sounds that have then been attenuated (reduced) by the user’s Phonak system reach the ear drum; protecting the user from dangerous noise throughout the day.
- 100% individualized hearing protection
- Perfect in-ear fit
- Highly robust & machine washable
- Quick and cost-efficient reproduction
- Easy to maintain and assess using SafetyMeter
Generic ear shells are also available. These one-size-fits-all versions are ideal for temporary or part-time use. Contact us for more details.
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Serenity SPC passive hearing protection with phone/radio communication
Serenity SPC is a static (passive) hearing protection system with built-in radio/phone communication, designed for use in the most demanding of constant-noise environments.
Compatible with professional radios/walkie talkies, cellphones and cordless landline telephones, this modular solution allows different interchangeable acoustic filters and/or headsets to be inserted into a user’s ear shells (eShells), for example to change the attenuation level or to use another Serenity device. Serenity SPC is lightweight, ergonomic and highly comfortable to wear.
- Perfect understanding of radio/phone conversations in noise
- Transmission of speech, not surrounding sounds
- Fully modular – click out eShells to change Serenity systems
- Static (passive) hearing protection
- Custom-molded eShells
A closer look at Serenity SPC’s technical specifications.
Standard boom microphone (short arm) |
|
| Microphone sensitivity | -44 (±4) dB re. 1V/Pa at 1 kHz |
| Microphone supply | 2.0V – 6.0V (1.3V – 4.0V with Earjack headset LIM Boom phone 2.5 / 3.5mm) |
| Microphone type | Electret, noise canceling |
Close-talk boom microphone (long arm) |
|
| Microphone sensitivity | -38 (+/- 4) dB re. 1V/Pa at 1kHz near field (6mm) |
| Microphone supply | 1.3V – 10V |
| Microphone type | Electret, noise canceling, close talk |
Common specifications |
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| Ear speaker sensitivity | 94 dBA @ 150 mVRMS |
| Ear speaker impedance | 50 Ω DC, 100 Ω @ 1 kHz |
| Maximum volume at ear speaker | 100 dB(SPL) |
| Cable pull force | 50 N |
| Operational temperature range | -20°C to +60°C |
| Electromagnetic compatibility (EMC) | EN 55022, EN 55024 |
Phonak eShells
‘eShells’ are Phonak’s custom-molded in-ear shells. Offering the best hearing protection for full-time workers who operate in noisy environments, eShells are durable hollow molds made from clinical nylon.
They are produced using a computerized 3D version of the user’s individual ear impression, which is taken beforehand by a hearing technician (a process that takes just 5 minutes).
When a Serenity or Primero DPC+ system’s earJack is clicked into an eShell, the ear is instantly and fully sealed. Only sounds that have then been attenuated (reduced) by the user’s Phonak system reach the ear drum; protecting the user from dangerous noise throughout the day.
- 100% individualized hearing protection
- Perfect in-ear fit
- Highly robust & machine washable
- Quick and cost-efficient reproduction
- Easy to maintain and assess using SafetyMeter.
| Wirings radio compatibility list EN DE FR | 67 K |  |
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Serenity DP+ electronic hearing protection
Serenity DP+ is a dynamic (or ‘active’) hearing protection system that features level-dependent electronic sound reduction. It is an ideal choice for users who are regularly exposed to fluctuating levels of loud noise. Now featuring plus-level (+) technology for enhanced listening comfort.
The system provides exactly the protection required by continually measuring the surrounding noise and adapting its attenuation (in-ear noise reduction) accordingly. This means excessive sound reduction is never an issue and you can remain fully aware of your surroundings, with the confidence to wear your protection all the time.
With Phonak’s electronic hearing protection, dangerously loud sounds are instantaneously reduced to a safe in-ear level. This rapid-fire response even ensures that short and unexpected ‘impulse noises’, such as shots and crashes, are dampened the moment they occur.
When surrounding noise levels return within a safe range, Serenity DP+’s attenuation is automatically reduced, allowing you to enjoy full ambient awareness, localize warning signals, and hold natural conversations. (This ‘ambient’ volume can even be increased if required).
- Level-dependent electronic hearing protection
- Instant protection against impulse noise
- Full ambient awareness in quiet
- Custom-molded eShells
- SafetyMeter compatible
Like other Serenity systems (except Classic), Serenity DP+ is fully modular. Simply click out your custom-molded eShells and click into another Serenity system.
A closer look at Serenity DP+’s technical specifications.
| Weight |
61 g / 2.11 oz |
| Marking | unique user ID on each eShell |
| eShells | custom-molded clinical nylon |
| Max. volume at ear speaker | 83 (± 2) dB(A) free field equivalent |
| Attack / release time |
0 ms / 200 ms |
| Volume control range | -15 dB to +12 dB vs. natural hearing |
| Battery size, supply voltage, life | LR03 (AAA), 1.2 V – 1.5 V, min. 200 h |
| Typical power consumption (internal battery) | 6 mA |
| Operational temperature range | -20°C to +60°C |
| Accessories | silicone neck cord with safety breaks rotating attachment clip for control box carry case optional metal detection eShell inserts |
| Electromagnetic compatibility (EMC) | EN 55022, EN 55024 |
| Inflammability |
EN 13819-1 ch5.6 |
Phonak eShells
‘eShells’ are Phonak’s custom-molded in-ear shells. Offering the best hearing protection for full-time workers who operate in noisy environments, eShells are durable hollow molds made from clinical nylon.
They are produced using a computerized 3D version of the user’s individual ear impression, which is taken beforehand by a hearing technician (a process that takes just 5 minutes).
When a Serenity or Primero DPC system’s earJack is clicked into an eShell, the ear is instantly and fully sealed. Only sounds that have then been attenuated (reduced) by the user’s Phonak system reach the ear drum; protecting the user from dangerous noise throughout the day.
- 100% individualized hearing protection
- Perfect in-ear fit
- Highly robust & machine washable
- Quick and cost-efficient reproduction
- Easy to maintain and assess using SafetyMeter
| Serenity DP+ User Guide EN FR DE | 427 K | |
| Serenity for Shooters and Hunters Brochure EN | 1.1 M | |
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Serenity SP custom molded ear protection
Serenity SP is a fully modular, static (passive) hearing protection system.
Comfortable to wear the whole day yet robust enough for heavy industrial use, Serenity SP offers multiple attenuation (noise reduction) filters for use in environments with different noise levels.
Thanks to its modularity, users can exchange Serenity SP for any other Serenity system (except Classic). Simply click out the system’s customized eShells to add communication functionality (Serenity SPC), dynamic hearing protection (Serenity DP+) or both (Serenity DPC+).
- Custom molded ear protection
- Static-level (passive) noise attenuation
- Different acoustic filters available for customizable protection
- Phonak SafetyMeter compatible.
A closer look at Serenity SP’s technical specifications.
| Weight |
10 g / 0.35 oz |
| Marking | unique user ID on each eShell |
| eShells | custom-molded clinical nylon |
| Attenuation filter: (white, 110WH) | +28 dB SNR / 27 NRR low-frequency attenuation value: 20 dB medium-frequency: 24 dB high-frequency: 31 dB |
| Attenuation filter: (orange, 105OR) | +24 dB SNR low-frequency attenuation value: 17 dB medium-frequency: 20 dB high-frequency: 26 dB |
| Attenuation filter: (yellow, 100YE) | +25 dB SNR low-frequency attenuation value: 16 dB medium-frequency:22 dB high-frequency: attenuation value: 30 dB |
| Compliance | EU directive 89/686/EEC |
| Accessories | silicone cord with safety breaks attachment clip carry case metal detection (optional) |
Phonak eShells
‘eShells’ are Phonak’s custom-molded in-ear shells. Offering the best hearing protection for full-time workers who operate in noisy environments, eShells are durable hollow molds made from clinical nylon.
They are produced using a computerized 3D version of the user’s individual ear impression, which is taken beforehand by a hearing technician (a process that takes just 5 minutes).
When a Serenity or Primero DPC+ system’s earJack is clicked into an eShell, the ear is instantly and fully sealed. Only sounds that have then been attenuated (reduced) by the user’s Phonak system reach the ear drum; protecting the user from dangerous noise throughout the day.
- 100% individualized hearing protection
- Perfect in-ear fit
- Highly robust & machine washable
- Quick and cost-efficient reproduction
- Easy to maintain and assess using SafetyMeter.
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Serenity Classic custom molded ear protection
Serenity Classic is a static (passive), custom molded ear protection system that is designed to suit the most rugged work environments.
The system features Phonak’s robust, machine-washable clinical nylon ‘eShells’. These are custom-made to fit the user’s individual ear canals, making them comfortable to wear over the entire working day.
These in-ear shells are then linked by a single silicon cord, which features safe break points under each ear to ensure no tangling or trapping can occur.
Super-durable, long-lasting and cost-effective, Serenity Classic custom molded ear protection is the perfect choice for users who need to counteract continuous loud noise at work or play – whether plant worker, road mender or sport shooter.
- Custom-molded machine-washable eShells
- Silicon cord with safety break points
- Day-long comfort
- Different acoustic filters available for customizable protection
- Verifiable with Phonak SafetyMeter.
A closer look at Serenity Classic’s technical specifications.
| Marking | unique user ID on each eShell |
| eShells | custom-molded clinical nylon |
| Attenuation filter: (white, XC92WH) | +29 dB SNR / NRR 29 low-frequency attenuation value: 22 dB medium-frequency: 27 dB high-frequency: 31 dB |
| Attenuation filter: (brown, XC92BR) | +25 dB SNR low-frequency attenuation value: 18 dB medium-frequency: 23 dB high-frequency: 28 dB |
| Attenuation filter: (yellow, XC92YE) | +24 dB SNR low-frequency attenuation value: 14 dB medium-frequency: 21 dB high-frequency: 29 dB |
| Operational temperature range | -20°C to +60°C |
| Compliance |
EU directive 89/686/EEC |
Phonak eShells
‘eShells’ are Phonak’s custom-molded in-ear shells. Offering the best hearing protection for full-time workers who operate in noisy environments, eShells are durable hollow molds made from clinical nylon.
They are produced using a computerized 3D version of the user’s individual ear impression, which is taken beforehand by a hearing technician (a process that takes just 5 minutes).
- 100% individualized hearing protection
- Perfect in-ear fit
- Highly robust & machine washable
- Quick and cost-efficient reproduction
- Easy to maintain and assess using SafetyMeter.
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Silemo Mini custom-molded silicon ear plugs
Silemo Mini are customized silicon ear plugs that are virtually invisible in the ear. They fit comfortably and securely in the ear canal, and feature a handy nylon feeler for quick and easy removal.
These transparent plugs cut out disturbing surrounding noise without affecting your ability to hear your colleague’s words or other important speech sounds.
As a result, Silemo Mini are the perfect hearing protection solution for use in offices, other relatively clean work places and by private individuals.
- Custom-molded silicon ear plugs
- Completely discrete
- Comfortable to wear all day
- Hypoallergenic
- Different acoustic filters available (see Technical above).
- Suit office and individual use.
A closer look at Silemo Mini’s technical specifications.
| Material |
hypoallergenic silicon |
| Feeler | nylon |
| Attenuation filter: grey (XC92 GR) | +21 dB SNR low-frequency attenuation value: 14 dB medium-frequency: 17 dB high-frequency: 23 dB |
| Attenuation filter: brown (XC92 BR) | +23 dB SNR low-frequency attenuation value: 17 dB medium-frequency: 20 dB high-frequency: 25 dB |
| Attenuation filter: white (XC92 WH) | +25 dB SNR low-frequency attenuation value: 20 dB medium-frequency: 22 dB high-frequency: attenuation value: 26 dB |
| Hearing protection compliance | EN 352-2:2000 |
| Accessories | carry case |
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SafetyMeter fit testing system
SafetyMeter is Phonak’s proprietary hearing protection fit testing system. It is designed to ensure users of Phonak Serenity systems receive, and continue to receive, exactly the protection they require over time.
While every certified form of hearing protection includes a published attenuation (in-ear noise reduction) value – called SNR values in Europe, NRR in the U.S. – the amount of attenuation two users receive from their identical systems can in reality be different.
This depends on two factors: the protection (its shape, material and production quality); and its fit (i.e. how well its user inserts and positions their protection in the ear).
Phonak’s SafetyMeter system controls and documents the actual attenuation a Serenity user receives. It verifies:
- Ear shell quality
Rejects inaccurately shaped shells due to poor quality ear impressions - Correct insertion
Detects incorrect insertion of shells in the ear (helping safety managers to offer effective hearing protection training) - Actual attenuation
Provides each user with a Personal Attenuation Rating, or PAR, for their specific system - Attenuation behavior
Ensures a user’s protection remains effective.
- Ear shell quality
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SafetyMeter offers safety managers a range of benefits they can rely on.
Personal validation
Individually check, confirm and record the protection of every Phonak Serenity user
Confidence
Know that at-risk employees are in posession of hearing protection that performs well within the required parameters
Training
With SafetyMeter fit testing system every user can experience, ‘feel’ and understand the attenuation difference between correct and incorrect eShell use. This real-world form of hearing protection training can be invaluable
Cost savings
More accurate protection means fewer cases of hearing loss, leading to reduced compensation costs and fewer recordables
Improved compliance
With SafetyMeter it is easy to meet national hearing protection regulations and the recommendations of safety organizations.
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Fit testing made simple: 4 steps to success
1. Connect
The operator connects the SafetyMeter soundcard to a PC that contains Phonak’s proprietary software: one end is attached to the PC via USB, the other slots into the SafetyMeter headphones and probes. Finally the probes are connected to the employee’s individual ear shells (Phonak eShells).
2. Wear
The employee slots in their eShells as normal. Then they place SafetyMeter’s test headphones on top.
3. Run
The operator runs the SafetyMeter test. The system plays sounds through the headphones and uses miniature microphones to measure the residual sound inside the employee’s ear shells. By computing the difference between the sounds in the headphones and in the ear, the attenuation level of the shells is calculated.
4. Results
Test results are created, which the safety manager can view, save
Fit testing made simple: 4 steps to success
1. Connect
The operator connects the SafetyMeter soundcard to a PC that contains Phonak’s proprietary software: one end is attached to the PC via USB, the other slots into the SafetyMeter headphones and probes. Finally the probes are connected to the employee’s individual ear shells (Phonak eShells).
2. Wear
The employee slots in their eShells as normal. Then they place SafetyMeter’s test headphones on top.
3. Run
The operator runs the SafetyMeter test. The system plays sounds through the headphones and uses miniature microphones to measure the residual sound inside the employee’s ear shells. By computing the difference between the sounds in the headphones and in the ear, the attenuation level of the shells is calculated.
4. Results
Test results are created, which the safety manager can view, save and print.
Hearing Protection FAQ
This section answers the questions we regularly receive about our in ear hearing protection systems (Serenity, Primero DPC+, Silemo Mini) and our SafetyMeter fit testing system.
Note: If the information you require is not shown below, please help us improve this page by sending us your question (we will also email you our reply direct).
What is hearing protection?
Hearing protection refers to equipment and systems that protect hearing from dangerously loud noise. In the case of Phonak’s in-ear systems, both passive (static) and level-dependent dynamic (‘active’) hearing protection systems are available, either with or without built-in communication functionality.
What is attenuation (SNR/NRR)?
Attenuation is a general term that refers to any reduction in the strength of a signal. In the case of audio therefore, attenuation is the reduction of the strength of a sound signal.
The amount or degree of attenuation is most often expressed using units called decibels (dBs). As an example, Phonak’s Serenity DPC+ hearing protection device protects the wearer’s hearing by attenuating sounds that are above a pre-determined ‘safe’ volume level.
Why is hearing protection important?
Loud noise is dangerous and the impact it can have on a person’s hearing is irreversible. Exposing your ears to a 100 dB (decibel) noise – i.e. the noise levels of industrial equipment or an MP3 player at full volume – damages the inner ear, even if experienced for just 15 minutes. Working unprotected in loud environments for several hours at a time is even more risky.
The problem is simple: once destroyed, the microscopic hair cells of the inner ear do not grow back. Neither can these crucial tiny hairs be artificially recreated by any medical process. The consequence is permanent hearing loss and a highly frustrating ringing in the ears (tinnitus).
The negative effects don’t stop there. In addition to reduced hearing capability, the consequences of exposure to noise include: stress and nervousness; reduced concentration and quality of sleep; degraded performance and productivity; increased risk of workplace accidents; difficulty in communicating; a feeling of isolation and increased medical expenses.
What are the different types of hearing loss?
There are several degrees of hearing impairment:
Mild hearing loss
– Unable to hear soft sounds
– Difficulty understanding speech in noisy environments
Moderate hearing loss
– Unable to hear soft and moderately loud sounds
– Considerable difficulty in understanding speech, particularly in background noise
Severe hearing loss
– Some loud sounds are audible
– Communication without a hearing aid is impossible.
How common is noise-induced hearing loss?
– An estimated 40 million European workers are exposed to noise for at least 50% of their working hours
– Noise-induced hearing loss (NIHL) accounts for about 1/3rd of all work-related diseases in Europe
– More than 7% of European workers already suffer from NIHL
– One quarter of the 40 million cases of American hearing loss can be attributed to NIHL. Click to learn about different dB noise levels.
What are some real-life examples of different decibel (dB) noise levels?
Decibel sound levels range widely; from the ‘comfortable to hear’ rustling of leaves at just 20 dB (decibels), to annoying sounds such as road traffic (70 dB), potentially damaging sounds such as 90 dB trucks and, further still, gun shot and jet engine sounds (130-150 dB). The noise levels of industrial equipment vary just as widely.
A useful rule of thumb is this: if you have to shout, or have difficulty being understood by someone just 2 meters away, then the sound level is approximately 80 dB.
If the same problem occurs at a distance of just 1 meter, the noise level is around 90 dB.
To learn more about decibel noise levels, click here (image opens in new window).
What is the best type of hearing protection for staff with an existing hearing loss?
Phonak’s research has discovered that users with an existing hearing loss benefit most from using ‘dynamic’ (level-dependent) hearing protection. With this approach a user’s communication is enhanced, which in turn should lead to better compliance.
To read Phonak’s full report on this topic, download our Hearing Protection For People With Hearing Loss guide from the Download Center.
What is the difference between passive and active hearing protection?
So-called ‘passive’ or static level hearing protection – like that provided by Phonak’s Serenity Classic and Serenity SP systems – provides a constant, unchanging amount of sound reduction (‘attenuation’). This makes passive protection systems a great fit for people who work or play in continual loud noise. Some passive attenuation systems, such as Serenity SPC, are also available with built-in radio communication.
In contrast, dynamic or ‘active’ (also referred to as intelligent) hearing protection systems provide electronic level-dependent protection.
When an active system’s built-in miniature microphones detect noise levels reaching dangerous levels – including very short ‘impulse’ noises such as gun shots or crashes – these sounds are instantaneously reduced to a comfortable, safe level. However, when sound levels decrease to safe levels, active systems detect this too and instantly reduce the attenuation provided, even amplifying some quieter sounds, to give the user full environmental awareness and allow normal conversation (without the user them having to take off the protection, which risks hearing damage if sudden loud noises then occur).
Due to this intelligent capability, active hearing protection systems such as Phonak’s Serenity DP+, Serenity DPC+ and Primero DPC+ are the perfect choice for people who operate in environments where noise levels regularly fluctuate.
Can I alter the level of attenuation (sound reduction) I receive from my Phonak system?
Yes. In the case of Phonak’s passive protection systems (such as Serenity Classic/SP/SPC and FreeCom 5000), each system offers three acoustic filter options, with each filter offering a different degree of attenuation (see Technical tab on this page).
In contrast, Phonak’s dynamic level-dependent (or ‘active’) hearing protection devices automatically attenuate the surrounding noise, meaning you do not need to adjust a thing.
Do Phonak’s in-ear hearing protection systems really offer as much protection against noise as traditional ear muffs and plugs?
Yes, absolutely. It is a common misperception that you need to wear something that covers all the ears to receive effective protection against noise. Our in-ear hearing protection systems are fully certified and provide highly accurate, reliable protection.
What material are Serenity eShells made from?
Serenity custom molded hearing protection features Phonak’s eShells, which are manufactured from clinical nylon using a special selective laser sinthering process.
Clinical nylon is biocompatible, highly resistant to mechanical, chemical and thermal stresses, and extremely lightweight (weighing approximately one third of the weight of acrylic or silicone). Clinical nylon is also used extensively in the medical device industry.
Can having a hard material such as nylon in the ear cause headaches and pressure build-up?
No, because each eShell mold is custom-made to fit the individual’s ear and manufactured with perfect accuracy. As a result, it feels and behaves in a completely natural way in the ear.
How long can Serenity hearing protection devices be used before they must be replaced?
Serenity in-ear hearing protection devices are particularly resistant to mechanical and chemical stresses and can be used for between 3 and 5 years. This life-span can even be extended through the scheduling of regular, individual attenuation performance measurements, using Phonak SafetyMeter.
How do I clean Serenity’s eShells?
This form of in-ear custom molded protection can be cleaned simply with soap and lukewarm water, or in the washing machine (maximum 60°C / 140°F). After cleaning, just make sure you dry the ear molds completely – either by leaving them overnight or by using a fan or compressed air (such as a hairdryer).
What is an ‘in-situ’ measurement?
A so-called ‘in-situ’ measurement is the evaluation of an individual’s hearing protection’s attenuation using a product such as Phonak’s SafetyMeter noise attenuation testing system.
This is an objective control of a system’s actual attenuation performance for an individual user. An advantage of this approach for employees, company doctors or professional organizations is that such performance results can be fully documented.
Do Phonak hearing protection systems guarantee constant attenuation?
Yes, for several reasons:
– Perfect shape accuracy due to Phonak’s custom-made eShells
– Unique and individual evaluation of in-the-ear attenuation via Phonak SafetyMeter
– Clinical nylon is resistant to mechanical, thermal and chemical exposure
– Filter characteristics are individually adaptable to the noise level at work.
Do Phonak generic shells provide hearing protection or do I need customized eShells to ensure I am protected?
Generic ear shells also provide certified hearing protection, however our custom-molded ‘eShells’ are recommended for heavy and/or long-term use.
How cost-effective are Serenity systems?
Cost-effectiveness is an important factor in determining which hearing protection equipment to invest in. Cheap solutions such as disposable ear protectors are not necessarily economical long-term. The cost-effectiveness of Serenity products is guaranteed by:
– Their acceptance and effectiveness
– Lower rates of work absence and improved company efficiency due to minimized disturbances for those wearing the hearing protection (fewer headaches, inflammation of the ear etc.)
– A long life-span of 3 – 5 years thanks to the clinical nylon used
– Extendable product life via regular measurement of Serenity’s attenuation for each user
– No additional costs for special and expensive cleaning agents (Serenity ear shells are completely machine-washable)
– Cost-effective and fast replacement of eShells due to Phonak’s digital manufacturing process and user data recording.
Is Serenity suitable for use in the food industry?
Yes, Serenity systems are highly suited to use in the food industry. Each eShell can be ordered with a small metal component built-in, which is easily detected by special metal detectors used in food processing factories.
How can I re-order eShells?
An identical copy of any Serenity eShell can be ordered by phone or e-mail from anywhere in the world. Either contact your eShell supplier or try this Supplier page. All that’s required is an eShell’s ID number; this is marked on the Serenity ear mold, its pocket and in the product documentation.
What is fit testing and why is it important?
For over 30 years, hearing conservation professionals have known that the Noise Reduction Rating (NRN) or SNR (in Europe) is not necessarily representative of the protection afforded to the average user of hearing protection.
The amount of attenuation two users receive from their identical protection systems can be different. This depends upon two factors: the user’s protection itself (its shape, material and production quality); and its fit (i.e. how well its user is able to insert and position their protection in the ear).
Fit testing takes the guesswork out of HPD fittings. It controls and documents the actual protection (‘attenuation’ or sound reduction) the hearing protection device applies.
Individuals involved in the fitting process and receiving positive feedback on the proper fit of their ear protection will be more likely to have a positive attitude about protecting their hearing and will be more apt to use this protection correctly and consistently. This positive outcome should result in reduced noise-induced hearing loss in the workplace.
Who should use fit testing systems?
Fit testing is for everyone. When a user receives any type of new hearing protection it is important to check that it performs properly and the user understands how to use it fully.
With custom-molded HPDs, fit testing also serves as an important quality control tool. Taking ear impressions and making shells is an art, not a science. In some cases over 10% of ear molds have to be remade before a proper fit and attenuation performance is achieved.
How should you select a fit testing system?
To date, field fit-test methods for use with hearing protectors include subjective real-ear attenuation at threshold (REAT) measurements, objective field microphone-in-real-ear (F-MIRE) measures and loudness balance technologies, to obtain a personal attenuation rating (PAR). There is currently no agreed standard for determining how a PAR should be calculated; each fit testing system uses a proprietary calculation to determine the result displayed.
First you must choose between a subjective or objective method of testing. In some situations HPDs that are currently in use are only verifiable with a subjective test (these are less accurate as they require employees to respond to sound stimuli, similar to an audiogram).
A more consistent and accurate attenuation value is obtained with an objective measurement such as F-MIRE, which involves a dual-microphone real ear measurement of a test signal.
Your selection also depends on your HPD mix and your hearing conservation program’s goals. Ideally all your HPDs should be compatible with an ‘objective’ fit testing system.
What is SafetyMeter?
SafetyMeter is Phonak’s proprietary hearing protection fit testing system. It is designed specifically to control and document the actual protection (‘attenuation’) a Phonak Serenity user receives.
The system’s objective fit verification protects both employee and employer better through being able to reliably predict HPD performance in real world situations. Re-usable test probes also eliminate the need for consumables, which can add significantly to ongoing fit testing costs with other systems.
Why is it important to test hearing protection devices?
When a user receives new custom hearing protection it is important to check that their in-ear shells (in this case Serenity eShells) have been produced using an accurate impression and are therefore providing the attenuation (sound reduction) required. A fit testing system ensures this is the case.
Thereafter, regular ongoing attenuation testing is also equally important. This ensures that hearing protection users are using their systems properly (i.e. inserting and wearing ear shells correctly), and that the attenuation a user’s system provides has not been compromised in some way (i.e. by shells having been physically damaged).
Who should use SafetyMeter?
SafetyMeter is aimed at any organization that widely uses Phonak’s custom-molded Serenity ear shells, or Serenity suppliers who sell to and work with such organisations.
Organisations that currently use Serenity include: manufacturers, security services, fire services, construction companies, road working companies and many more.
Who operates SafetyMeter?
SafetyMeter’s fit testing process is carried out by a trained operator. This can be either a visiting Phonak service technician or a member of in-house safety/medical staff who has been trained by Phonak.
Where can a SafetyMeter test be performed?
SafetyMeter testing does not require a special sound-proof room. Testing can be performed in any quiet environment, such as a manager’s office or meeting room. The system is portable, and easy to set up and dismantle.
How often should tests be run?
Every new fitting should be validated. Thereafter, regular ongoing attenuation testing is equally important. This ensures that user HPDs work effectively over time, and that the attenuation an employee’s system provides has not been compromised in some way (i.e. by shells having been physically damaged).
Phonak recommends that a user’s Serenity protection is fit tested every second year. However, in the event of a user mentioning a specific problem with their hearing protection, or the user’s body weight changing significantly, a new fit test should be run immediately.
What is the PAR?
The Personal Attenuation Rating, or PAR, is an ear protection rating that applies to one user and their hearing protection system. Unlike SNR (Europe) and NRR (US) ratings, this figure does not represent an average figure based on test results from several users wearing a protection product. Instead it is specific to a single user’s product and ears.
How should the PAR be used?
At the bottom of SafetyMeter’s Personal Attenuation Control Certificate, which is created after each test, the user is given Phonak’s Serenity usage recommendations. These suggestions are not general figures but are very specific to the PAR rating of the individual user’s hearing protection. These figures recommend the user’s maximum recommended exposure to noise (in hours) at different surround noise levels (measured in decibels), when wearing their Serenity in ear hearing protection.