SONNET Audio Processor

Meet SONNET—your ideal audio processor. It's sleek, lightweight, and water-resistant. It can be quickly connected to your phone. And it focuses in on the conversation to make sure you can hear your best, no matter where you are.

SONNET Audio Processor

Hear Your Best

SONNET isn't just light and comfortable to wear, it's also smart. Find out how SONNET's advanced technology can help you hear your best.

  • Great sound quality
  • Water-resistant design
  • Wireless connectivity
  • Rechargeable batteries
SONNET Cochlear Implant Processor

Sound on the Go

You're adaptable. Your processor should be too. With Automatic Sound Management 2.0 (ASM 2.0), SONNET uses dual microphone technology to let you focus in on the conversation. Come wind, come crowds, you can focus on the sounds around you rather than constantly changing volume and settings.

Microphone Directionality focuses your hearing by using two microphones to sharpen the sounds in front of you. This gives you better listening, especially in noisy settings.

Wind Noise Reduction minimises continuous wind noise, making it easier to hear in outdoor settings. The wind noise reduction can be adjusted for your specific needs.

Automatic Volume Control continuously monitors your environment and seamlessly adjusts volume levels to ensure every sound is heard clearly and comfortably.

Bring sounds closer
SONNET and AudioStream

Simple Streaming

Use the phone you like, and connect it to the audio processor you love. SONNET makes it easy to listen to your favorite music, and enjoy phone calls with your loved ones in high-quality, true stereo. Just slide the AudioStream cover onto your audio processor to enjoy direct wireless streaming from your smartphone or tablet.


Discover More


No Interruptions            

We don’t like interruptions any more than you do. With that in mind, we’ve designed a processor with up to 60 hours of battery life, giving you days of uninterrupted listening without any compromise in sound quality.

Alternatively, use SONNET's specially-designed Rechargeable Batteries and power your processor the easy way.


Dive Right In

The splash from a pool. The sweat on your brow. The sand on a beach. Life can get messy, and you shouldn’t have to choose between sound and the activities you love. And with the water-resistant, dust-resistant SONNET, you don’t have to.

Whether you hear the spring of the diving board or the siren song of the surf, consider SONNET your swimming sidekick. Go ahead—get in the water. The sleek, reusable WaterWear cover makes SONNET completely waterproof in any kind of water.

Discover More


For Kids

With its tamperproof design and simple link-check function, SONNET is built for even the most adventurous kids. Its flexible wearing options make SONNET comfortable to wear for even the littlest ears.

SONNET Audio Processor Colours

Mix It Up

Make your SONNET suit your style. Choose from hundreds of color combinations for the audio processor, coil, battery pack covers, microphone covers, and even the cable. Just click below to find your ideal look with our interactive Color Configurator.

And with the stylish Design Covers for SONNET's DL-Coil, you can change your look in a snap. 

Discover More
Base and Coil
Microphone & Battery Covers
  • Placeholder-AP-StyleBlack
  • Placeholder-AP-StyleWhite
  • Placeholder-AP-StyleNordic Grey
  • Placeholder-AP-StyleBeige
  • Placeholder-AP-StyleAnthracite
  • Placeholder-AP-StyleEbony
  • Placeholder-AP-StyleSienna Brown
  • Placeholder-AP-StyleCool Grey
  • Placeholder-AP-StyleCreme
  • Placeholder-AP-StyleBaby Blue
  • Placeholder-AP-StyleBaby Pink
  • Placeholder-AP-StyleOrange
  • Placeholder-AP-StyleGreen
  • Placeholder-AP-StyleBordeaux Red
  • Placeholder-AP-StylePacific Blue
Additional Coil Covers

A New Look

With customizable adhesive skins from DesignSkins, you can customize your SONNET to suit your style. Choose from thousands of colorful designs, or upload your own for a truly unique look.

Discover More

SYNCHRONY 2 Cochlear Implant

Great sound quality is only possible with a great implant. With SYNCHRONY 2 you can benefit from excellent implant reliability and our MRI Guarantee.

But the biggest advantage of SYNCHRONY 2 is that it mimics natural hearing. The result? The closest to natural hearing of any cochlear implant system.

Discover More 


See why hundreds of thousands of people have entrusted MED-EL with their hearing.

Discover More


Find all the information you'll need to care for your SONNET.

Discover More


Share experiences with other MED-EL recipients on social media.

Discover More

Technical Data


Width: 37.4mm
Height: 67.6mm with Battery Pack Cover Max
Height: 56.7mm with Battery Pack Cover
Height: 51.4mm with Battery Pack Cover Micro
SONNET Audio Processor Size
Thickness: 5.9mm

Now only

Thickness: 9.3mm

SONNET Audio Processor

Weight and Dimensions

  • 6.1 g (with ActiveWear)
  • 10.6 g (Me1310 with two 675 zinc-air batteries)
  • DL-Coil: 4.6 g, 32.8 mm x 5.8 mm
  • DL-Coil: 5 magnets available in 9 strengths
  • Durable coil cables available in 3 lengths:
    • 6.5 cm (2.6 in)
    • 9 cm (3.5 in)
    • 28 cm (11.0 in)


  • Processor & Coil: Mixture of polycarbonate and
    acrylonitrile-butadiene-styrol polymer
  • Earhook: Polyamide (PA)
  • Cable: PVC and TPE Evoprene
  • Biocompatible according to ISO 10993-1
  • Latex-free*


  • Compatible with all MED-EL multichannel cochlear implants
  • MAX Programming Interface
  • MAESTRO System Software 6.0 or later
  • Compatible with hearing aids of all brands and types

Product Features

  • Frequency Range 70–8500 Hz
  • Splash-proof design with IP54 rating
  • Dual microphones
  • Datalogging
  • Tamperproof design
    • Secured earhook
    • Locking battery pack
    • Choking hazard avoidance
    • Additional fixation options
    • Locking coil cable (locked to coil and control unit)
  • Link monitoring function with LED indicator
  • Four program positions
  • Continuous volume and sensitivity control with FineTuner or AudioKey 2 app

Sound Processing Features

Front-End Processing

  • Automatic Sound Management 2.0 (ASM 2.0)
  • Microphone directionality
  • Wind Noise Reduction
  • Automatic Volume Control with Dual-Loop AGC
  • Input Dynamic Range (IDR) of 78 dB

Sound Coding Strategies

  • FS4 (Fine Structure Processing up to 1 kHz on 4 apical channels)
  • FS4-p (Fine Structure Processing up to 1 kHz on 4 apical channels with Intelligent parallel Stimulation for even higher temporal accuracy)
  • FSP (Fine Structure Processing typically up to 350 Hz on 2 apical channels)
  • HD-CIS (High Definition CIS)
  • Biphasic or Triphasic stimulation pulses
  • Supports 250 spectral bands



  • 2.4 GHz wireless communication
  • Direct wireless audio streaming via Bluetooth Low Energy with AudioStream
  • True stereo sound quality
  • Support for bilateral usage
  • Integrated telecoil



  • Dimensions: 68 x 38 x 17.5 mm
  • Weight: 35 g
  • Remote microphone
  • Hands-free phone calls
  • TV streaming
  • Music streaming
  • Direct audio input (DAI)

AudioKey 2 App

  • Remote control functionality
  • Guardian roles
  • Find My Processor
  • Send feedback

FineTuner Echo

  • Dimensions: 104 x 38 x 11 mm
  • Weight: 32 g (including battery)
  • Compact remote control with bi-directional communication
  • ePaper Display
  • Test audio processor microphones
  • SONNET battery status

WaterWear Cover

  • Waterproof up to 4 m depth
  • Can be used in salt, fresh and chlorinated water

Battery Options

Zinc-Air Batteries

  • Up to 60 hours of use with a set of 2 disposable zinc-air 675 batteries

Rechargeable Battery Max

  • Dimensions: 32 x 14 x 7 mm
  • Processor weight with battery: 10.4 g
  • Usage time: Up to 17 hours
  • Charging duration: ~6 hours
  • Charging/discharging: >1800 cycles (80% capacity)**

Rechargeable Battery Standard

  • Dimensions: 22 x 14 x 7 mm
  • Processor weight with battery: 9.1 g
  • Usage time: Up to 10 hours
  • Charging duration: ~4 hours
  • Charging/discharging: >5000 cycles (80% capacity)**

Rechargeable Battery Micro

  • Dimensions: 16 x 14 x 7 mm
  • Processor weight with battery: 8.1 g
  • Usage time: Up to 7 hours
  • Charging duration: ~3 hours
  • Charging/discharging: >5000 cycles (80% capacity)**

Charging Unit

  • 4 simultaneous charging slots
  • Power & charging indicator lights
  • USB powered: 5V DC, 500mA
  • USB power adapter: 100–240V AC (~50/60 Hz)

The Bluetooth® word mark and logos are registered trademarks owned by the Bluetooth SIG, Inc. and any use of such marks by MED-EL is under license.

Please find detailed information and specific conditions for use for each product in the respective instructions for use.
All functions and features may not be available in all markets. Enabling features on the hardware may be subject to technical considerations.

* Whereby “free” means “not made with latex” according to current FDA guidance: “Recommendations for Labeling Medical Products to Inform Users that the Product or Product Container is not Made with Natural Rubber Latex”, 2014.
** Charging Cycles dependent on individual usage.