Single-Unit Audio Processor


Incredibly Simple, Simply Incredible

Why is RONDO 3 so exciting? By combining sleek simplicity, wireless charging, exceptional hearing, and seamless connectivity, RONDO 3 offers incredible performance in a sleek, stylish design—making it an ideal choice for any recipient.

  • Superior hearing performance
  • Incredibly simple handling
  • Wireless connectivity
Closest to Natural

Closest to Natural

RONDO 3 is made for exceptional hearing performance, even in challenging listening environments. Automatic Sound Management 3.0 seamlessly adapts to any listening environment for optimal hearing and hands-free control. From busy offices to noisy restaurants, ASM 3.0 enables clearer, more comfortable hearing experience.

And by combining dual microphones and ASM 3.0 with MED-EL’s unique long arrays and FineHearing sound coding, RONDO 3 offers a sound quality no other single-unit processor can match. [ft] [ft] [ft] [ft] [ft] [ft] [ft] [ft] [ft] [ft] [ft] [ft] [ft] [ft]

Microphone Directionality
Two microphones reduce noise from behind and focus on sounds to the front for significantly better hearing in noise.[ft]

Automatic Volume Control
Dual-Loop Automatic Gain Control instantly adapts volume levels to make loud sounds more comfortable and soft sounds easier to hear.

Ambient Noise Reduction
Reduces continuous ambient noise—such as a desk fan—for easier, clearer listening.
Adaptive Intelligence
Intelligently adapts front-end processing to changing listening environments for your best hearing in any environment.
Wind Noise Reduction
Minimises continuous wind noise for improved listening in outdoor environments.
Transient Noise Reduction
Instantly attenuates sudden loud noises, like a vacuum cleaner or clattering dishes, for comfortable listening.

Natural Loudness Growth 

Our Dual-Loop Automatic Gain Control instantly adapts volume levels to make loud sounds more comfortable and soft sounds easier to hear. With an extended loudness growth range and compression ratio (3:1), our loudness growth more closely follows natural loudness growth in the cochlea. [ft]

This is an advantage for loudness balancing with bilateral CIs, or if the other ear has natural hearing, such as single-sided deafness or for bimodal listening with a contralateral hearing aid.

Microphone Directionality

RONDO 3 uses two microphones with Microphone Directionality to mimic the natural pinna effect by reducing sounds behind and focusing to the front of the listener. This enables significantly better hearing performance in noisy environments.

Natural directionality provides significant advantage in everyday life, and Adaptive directionality provides a powerful boost in complex noise. [ft]

Complete Cochlear Coverage

In natural hearing, the nerve fibers of the spiral ganglion are tonotopically organized and extend the full length of the cochlea. If an electrode doesn’t cover two full turns (720°) of the cochlea, it can’t stimulate these nerve fibers to provide accurate pitch-place match.  

Our long, flexible arrays can be safely inserted all the way to the apical region to provide natural tonotopic stimulation across two full turns of the cochlea. With complete cochlear coverage, recipients can enjoy a natural pitch match from the very beginning. This enables significantly better hearing performance and a more natural hearing experience for your patients. [ft] [ft] [ft] [ft] [ft] [ft] [ft] [ft] [ft]

Data on file, calculated from mean cochlear parameters

FineHearing Sound Coding

In nature, the cochlea uses two types of sound coding. Place-pitch tonotopic coding is used along the whole frequency range. In addition to place-pitch coding, low-frequency sounds are also coded by rate. With this time-coding, the frequency of nerve signals is synchronized to the frequency of the sound below ~1000 Hz.

That’s why we created the only cochlear implant sound coding that mimics the natural time-coding for low frequencies and provides place-pitch match throughout the cochlea. By mimicking natural sound coding, FineHearing provides much more natural sound quality. [ft] [ft] [ft] [ft]

Anatomy-Based Fitting

Our default frequency allocation is designed to follow the natural tonotopic map of the cochlea. However, we know that one size does not fit all. This is why we are always striving to provide a closer match for each individual patient. Now, we are excited to be reaching closer to natural hearing than ever before with cochlear implants.

With our new anatomy-based fitting tools, you can easily fine-tune the frequency map of RONDO 3 to be closer to the natural map for each individual cochlea. By combining detailed imaging data from OTOPLAN with MAESTRO, you can now quickly assign center frequencies based on the actual anatomical location of each electrode contact. [ft] [ft] [ft]


Made for Bimodal

MED-EL cochlear implants are designed to provide a closer to natural match with any hearing aid. There are three main components that should match between the CI system and the hearing aid: pitch perception, loudness growth, and timing of a sound.

By combining these three elements, RONDO 3 offers the best solution for bimodal listening with practically any hearing aid.


Pitch Matching

Our long arrays and unique FineHearing technology provide the closest to natural pitch match of any CI, so we can provide a much closer match to the acoustic frequencies of the hearing aid. Other companies may use a bimodal fitting formula with frequency-shifting partial integration, which can compromise the performance of the hearing aid ear.

Our complete integration approach can offer a more natural frequency range and sound perception to both ears. This also lets you independently fit the hearing aid to best benefit, rather than using a bimodal fitting formula to correct for the CI.

Partial Integration


Cochlear Implant

Partial Integration

Hearing Aid


Complete Integration


Cochlear Implant

Complete Integration

Hearing Aid


Matched Loudness Growth

The natural loudness growth and 3:1 compression ratio of our proven dual-loop Automatic Gain Control makes it easy to balance with nearly any hearing aid—without having to drastically refit the hearing aid compression ratio. [ft]

This balanced front-end processing also means both the hearing aid and the audio processor can use any microphone directionality or beamformer settings without needing a wireless sync between devices. You can simply independently fit each device to best hearing benefit.

Compression Ratio

Synchronized Timing

Every hearing aid has an inherent processing delay, which is often longer than the processing time of the CI audio processor. This can cause a mismatch between the CI audio processing and the acoustic hearing aid. In turn, this timing mismatch would affect accuracy of inter-aural timing differences (ITDs).

With Bimodal Synchronization, you can easily match the processing delay timing between RONDO 3 and nearly any hearing aid, without needing to refit the hearing aid. This more natural timing match can help support better sound localization for bimodal listeners. [ft] [ft]

Better Sound Localization
Zirn et al. 2019

Incredibly Simple

By combining wireless charging, a unique all-in-one design, and hands-free control, RONDO 3 is our easiest-to-use audio processor ever made. This makes it incredibly easy to use, even for users with limited dexterity or eyesight. And with a sleek, stylish design, it’s also the perfect choice for patients who want a discreet wearing option for their CI.

Wireless Charging

Wireless Charging

RONDO 3 uses Qi technology to wirelessly recharge its integrated lithium-ion battery. This means no more fumbling to open the processor to change batteries. Just place it on the charging pad and RONDO 3 starts charging.

And with the charging cable, you can directly charge RONDO 3 through a USB power bank, so there’s no need to worry about running out of power.


All Day Battery

Set it on the charger at night and wake up to a full day of battery. Four hours of charging provides a full day of battery. You can check battery status on the processor or with the AudioKey 2 app.


Blend In or Stand Out

It’s incredibly simple to customize the look of RONDO 3. You can change RONDO 3 covers in a snap, making it easy to change between more than 30 stylish designs and subtle patterns.

Water Resistance

Water Resistance

With an IP68 rating, RONDO 3 is water-resistant to protect against rain, sweat, and everyday moisture.* The improved design even protects against accidental submersion, so you won’t have to worry about a drop in the bathtub.



And with the sleek WaterWear cover, RONDO 3 can be fully waterproof for swimming in salt, fresh, or chlorinated water.*



RONDO 3 makes it easy to stream phone calls or connect to music, movies, and television. With integrated 2.4 GHz wireless connectivity, RONDO 3 lets your patients connect to almost any audio source. Our all-in-one AudioLink accessory makes it easy to stay connected and our AudioKey 2 app is packed with useful tools for everday life.



With AudioLink, you can stream phone calls right to RONDO 3. You can also connect to music or stream high-quality sound from TVs or tablets. AudioLink also has a built-in microphone, so you can use it as a remote microphone. This offers an easy-to-use listening boost in busy meetings and restaurants or for clearer listening in a classroom.

  • Bluetooth® streaming
  • Remote microphone
  • Direct audio input


AudioKey 2

With our AudioKey 2 app, you can control all the user settings of RONDO 3 with iPhone or Android. Guardian roles let you create multiple users’ profiles for controlling processors, for flexibility and security in managing multiple users & processors. Find My Processor shows the last place RONDO 3 was connected to the app. And My Stats shows an overview of usage information, including programs used and daily usage time.

  • Remote control
  • Find My Processor
  • Guardian roles

FineTuner Echo

Finetuner Echo

The FineTuner Echo remote is a compact, easy-to-use remote with a built-in display. This bi-directional remote shows current settings, including program, volume, connectivity.

  • Bilateral support
  • Integrated speech processor test device
  • E-paper display

AudioStream Adapter for RONDO 3

Streaming audio is now easier than ever with the AudioStream Adapter. Simply plug the adapter into your RONDO 3, configure it with AudioKey 2, connect via Bluetooth, and start streaming.

  • Stream phone calls directly
  • Music and speech in high-quality true stereo
  • Ideal for bimodal users
Peace of Mind

Peace of Mind

When it’s easy for them, it’s easy for you. With RONDO 3, you can rest assured that your patients will have a reliable, easy-to-use audio processor. There are only 3 components (processor, microphone cover, and magnet), so there is no need to replace cables or fiddle with opening the processor. This all-in-one design makes RONDO 3 both highly durable and user friendly for all ages.



With such intuitive handling, you’ll have peace of mind knowing that your patients can be confident in handling their new audio processor.

Ready to Go

RONDO 3 comes ~50% pre-charged out of the box, so you can start fitting right away on activation day without worrying about charging.

Secure Fixation

With a low-profile design and flexible fixation options, RONDO 3 stays right where it should. RONDO 3 is available with 5 magnet strengths for reliable retention. For extra security, you can clip RONDO 3 to hair or clothing.


Why MED-EL: 
A Trusted Partner

For more than 30 years, MED-EL has been a trusted partner and innovation leader in hearing implants. We’re here to work together with you, and we’re committed to providing outstanding service and support for our professional partners.

With the most advanced cochlear implant systems, we offer the best hearing experience for your patients and the best clinical experience for you. 

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Ready to learn more about MED-EL cochlear implants?
Fill out our simple contact form and we’ll get in touch with you.

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Technical Data


Width: 35.8mm
Length: 44.9mm
Height: 11.9mm

RONDO 3 Audio Processor

Product Features

  • All-in-one design
  • 14.7 g with Mini Cover and magnet M1
  • 15.9 g with Standard Cover and magnet M1
  • Water-resistant according to IP68 standard: RONDO 3 is resistant to water splashes and submersion (up to a maximum depth of 1 m for 60 minutes).
  • Frequency range 70-9300 Hz
  • Dual microphones
  • Automatic Sound Management 3.0
  • Extended datalogging
  • Battery status indication via LED
  • Link Monitoring function with LED indicator
  • Continuous volume and sensitivity control via FineTuner Echo or AudioKey 2
  • Four program positions
  • Additional fixation options
  • Diametric magnet available in 5 strengths, axial magnet available in 5 strengths
  • Housing: Mixture of polycarbonate and acrylonitrile-butadiene-styrol polymer
  • Biocompatible according to ISO 10993-1
  • Latex-free**

Rechargeable Battery

  • Integrated lithium-ion battery
  • Up to 24 hours of use per charge***
  • Wireless recharging
  • Power supply and simultaneous charging possible via Charging Cable (e.g. connection to power bank)
  • Battery health is more than 80% capacity after 2000 charge/discharge cycles


  • 2.4 GHz wireless communication
  • Direct wireless audio streaming via Bluetooth Low Energy with AudioStream Adapter
  • True stereo sound quality
  • Support for bilateral usage
  • Compatible with AudioLink
  • Bimodal streaming possible with several brands of hearing aids
  • Telecoil adapter
  • Direct connectivity to assistive listening devices via Mini Battery Pack


  • Compatible with all MED-EL multichannel cochlear implants
  • MAX Programming Interface
  • MAESTRO System Software 9.0 or later
  • Bimodal use: compatible with all hearing aids


  • 6 Standard Covers (matte)
  • 5 Simplicity Covers
  • 24 Design Covers
  • 1 Mini Cover (black)

Colour Options

RONDO 3 Design Covers

Sound Processing Features

Front-End Processing

  • Microphone Directionality (Omni, Natural, Adaptive)
  • Adaptive Intelligence
  • Automatic Volume Control with Dual-Loop AGC
  • Wind Noise Reduction
  • Ambient Noise Reduction
  • Transient Noise Reduction
  • 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



  • Dimensions: 68 x 38 x 17.5 mm
  • Weight: 35 g
  • 2.4 GHz wireless communication
  • Remote microphone
  • Hands-free phone calls
  • TV streaming
  • Music streaming (wireless with Audio2Ear App)
  • Direct audio input (DAI)

AudioKey 2 App

  • Remote control
  • Guardian function
  • Datalogging
  • Find My Processor
  • Battery status

FineTuner Echo Remote Control

  • Dimensions: 104 x 38 x 11 mm
  • Weight: 32 g (including battery)
  • Bidirectional communication
  • Display
  • Troubleshooting
  • Battery status

WaterWear cover

  • Waterproof up to 4 m deep for 2 hours (according to IP68 standard)
  • Can be used in salt water, fresh water and chlorinated water

Charging Pad

  • USB port: 5 V DC, 1 A
  • USB power supply: 100–240 V AC (~50/60 Hz)
  • Wireless Qi Charging Protocol

* Water-resistant according to IP68 standard: RONDO 3 is resistant to water splashes and submersion up to a maximum depth of 1 m for 60 minutes. WaterWear is waterproof up to 4 m deep for 2 hours of submersion in salt-, fresh-, and chlorinated water.
** 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.
*** Battery life dependent on individual usage.

Detailed information and specific usage instructions for each product can be found in its respective user manual. All functions and features may not be available in all markets.
Recipients with MED-EL cochlear implants can be safely scanned following the conditions detailed in the implant instructions for use. For information concerning implant MR compatibility, please refer to the implant instructions for use or visit our important safety information page.
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