Skip to main content
Choose another country or region to see content specific to your location.
Phonak logo
Online hearing test
ero image of a head and torso highlighting the scientific research behind Phonak Audéo EON.

Phonak Audéo EON Evidence

What does the research show about Phonak Audéo EON?
 
Phonak Audéo EON is supported by technical measurements and clinical study findings showing benefits for speech understanding in noise, listening comfort, wind performance, and natural sound quality. Key evidence focuses on Spheric Speech Clarity 3.0, AutoSense OS AI™ 8.0 and WindBlock 2.0.

Jump to:

Business meeting situation on a table, showing how Phonak Audéo EON Sphere helps improve speech clarity in complex listening situations.

Spheric Speech Clarity™ 3.0 

Phonak Audéo EON Sphere outperforms four other hearing aids for clear speech in loud noise

What is Spheric Speech Clarity?

Spheric Speech Clarity 3.0 uses DNN-based denoising to enhance speech relative to background noise in real time - complementing microphone directionality options to support clearer speech in complex listening situations.

What did the measurement show?

Technical measurements showed that Phonak Audéo EON Sphere delivers up to 10 dB SNR benefit relative to omnidirectional mode and outperforms four other hearing aids tested in realistic loud-noise scenes.1*

Why does this matter for my client?
  • Phonak Audéo EON Sphere meets the client’s #1 listening need of clear speech in noise with unprecedented SNR benefit.
  • The combination of Spheric Speech Clarity 3.0 and microphone directionality options in Phonak Target and myPhonak enables individualized settings that balance spatial access and front focus to optimize the client’s listening needs when understanding speech in loud noise.1
Speech intelligibility index (SII) weighted signal-to-noise ratio (SNR) improvements in dB with respect to the omnidirectional microphone mode for Phonak technologies averaged across three realistic scenes, including a café scene, dinner party scene and food court scene. Results are presented for a fully occluded coupling and for the better ear. The speech signal was always presented from 0° azimuth.

Speech intelligibility index (SII) weighted signal-to-noise ratio (SNR) improvements in dB with respect to the omnidirectional microphone mode for Phonak technologies averaged across three realistic scenes, including a café scene, dinner party scene and food court scene. Results are presented for a fully occluded coupling and for the better ear. The speech signal was always presented from 0° azimuth.

Explore the evidence behind Audéo EON Sphere’s speech-in-noise performance
Image of women in a group conversation around a coffee table, illustrating how AutoSense OS AI 8.0 in Phonak Audéo EON helps maintain speech-focused settings when background noise levels briefly fluctuate.

AutoSense OS™ AI 8.0

A more natural listening experience for speech in loud noise

What is AutoSense OS AI 8.0?

AutoSense OS is an innovative machine learning (ML) algorithm designed to enhance the listening experience for hearing aid users by accurately identifying acoustic scenarios.

What is new in AutoSense OS AI 8.0?

A new hysteresis effect in AutoSense OS AI 8.0 helps reduce program switching when noise levels briefly fluctuate. This keeps the Speech in Loud Noise program active for longer, so speech-enhancing features such as Spheric Speech Clarity 3.0 or StereoZoom 2.0 can stay active more consistently.2

What did the measurement show?

In a recorded lunchtime scenario, AutoSense OS AI 8.0 delivered 20% more activation of the Speech in Loud Noise program compared with AutoSense OS AI 7.0.2

Why does this matter for my client?
  • Speech-enhancing features, that are proven to improve speech understanding and reduce listening effort, stay active for longer in noisy conversations.
  • This supports a more natural listening experience2 in everyday noisy places, such as restaurants, where sound levels can fluctuate.
The percentage of time that Infinio Ultra and EON hearing aids were in the Speech in Loud Noise (SPiLN) program when being in fluctuating a speech in loud noise environment during technical measurements.

The percentage of time that Infinio Ultra and EON hearing aids were in the Speech in Loud Noise (SPiLN) program when being in fluctuating a speech in loud noise environment during technical measurements.

Read the insight to learn more about AutoSense OS AI 8.0
Image of a runner on a windy beach, illustrating how WindBlock 2.0 in Phonak Audéo EON hearing aids supports more comfortable listening in outdoor environments with wind noise.

WindBlock 2.0

Enhancing outdoor communication

What is WindBlock 2.0?

WindBlock is a digital signal processing feature in Phonak hearing aids designed to detect and suppress wind noise to improve speech understanding in windy environments.

What is new in WindBlock 2.0?

Building upon our highly reliable wind noise detector, WindBlock 2.0 delivers improved target sound transparency while continuing to effectively attenuate low-frequency wind noise.5

What did the measurement show?

WindBlock 2.0 was evaluated using the Hagerman and Olofsson phase-inversion method, which is widely considered a gold-standard approach for separating speech and noise at the output of a hearing aid.

For the test, wind noise was recorded with Phonak Audéo EON RIC microphone satellites placed on a KEMAR mannequin in a wind tunnel, then combined with speech presented from 60°. This controlled setup made it possible to calculate signal-to-noise ratio improvement under realistic and repeatable outdoor listening conditions.

Why does this matter for my client?
  • The profile of hearing aid users is evolving, drawing a younger, more diverse population who place greater emphasis on hearing well in dynamic, mobile environments.
  • WindBlock 2.0 provides up to 50dB of wind noise reduction and up to 30dB of SNR improvement, leading to improved signal transparency.5
SNR benefit of the WindBlock features measured with the Hagerman/Olofsson in an electric setup

SNR benefit of the WindBlock features measured with the Hagerman/Olofsson in an electric setup

Read the insight to learn more about the study behind WindBlock 2.0
Head and torso simulator in a wind tunnel at PARC Stäfa, Switzerland, used to evaluate how WindBlock 2.0 in Phonak Audéo EON hearing aids supports comfort, natural sound quality and clearer speech in wind.
Study design

A PARC Canada study with 19 subjects with moderately-severe hearing loss compared WindBlock 2.0 with WindBlock 1.0 across different wind speeds, wind directions, and listening scenarios.6

Why does this matter for my client?

Participants overwhelmingly preferred WindBlock 2.0 for overall sound quality, listening comfort, reduced listening effort, naturalness, and speech clarity**

Take a closer look at the evidence behind WindBlock 2.0.

Audéo EON blog posts

Blog teaser image introducing Phonak Audéo EON and its latest innovations for natural listening, adaptive clarity, connectivity and intuitive design.

Introducing EON

Introducing EON, designed to make listening feel more natural and everyday life more effortless. Discover its latest breakthrough innovations, including adaptive clarity, unlimited connectivity and intuitive design, all created to fit naturally into clients’ lives wherever they are.

Blog teaser image for WindBlock, showing how Phonak Audéo EON supports more comfortable listening outdoors by reducing wind noise in everyday situations.

WindBlock

Wind noise is part of everyday life, whether walking on the beach, cycling, sightseeing. Discover how WindBlock can make listening more comfortable and help clients enjoy more of the moments they love.

Learn more about our high-quality evidence:

Footnotes

*As of July 2026    
**WindBlock 2.0 compared to previous generation, subjects with mild to moderately-severe hearing loss.

  1. Ulloa Sanchez, D., Kepp, K., Preuss, M. & Raufer, S. (2026). Phonak Audéo EON Sphere outperforms four other hearing aids for clear speech in loud noise. Phonak Insight. Retrieved from https://www.phonak.com/evidence

  2. Preuss, M, & Mülller, S. (2026). AutoSense OS™ AI 8.0 provides a more natural listening experience for speech in loud noise. Phonak Field Study News. Retrieved from https://www.phonak.com/evidence

  3. Latzel, M et al.  (2025) Spheric Speech Clarity improves speech understanding and reduces both listening effort and fatigue. Phonak Field Study News. Retrieved from https://www.phonak.com/evidence.

  4. Tian, E. et al. (2025) Spheric Speech Clarity significantly improves speech understanding in a multi-talker scenario and reduces spatial listening effort with Mandarin speakers.  Phonak Field Study News. Retrieved from https://www.phonak.com/evidence. 

  5. Lindeman, A., & Brunner, J. (2026) Enhancing outdoor communication: WindBlock 2.0 delivers up to 50 dB of wind noise reduction. Phonak Insight. Retrieved from https://www.phonak.com/evidence

  6. Vaisberg, J. M., Brunner., J., & Ulloa Sanchez, D. (2026). Hearing confidently in wind: WindBlock 2.0 delivers comfort, natural sound quality and clearer speech. Phonak Field Study News. Retrieved from https://www.phonak.com/evidence