Our independent lab evaluation of the Sony CRE-C20 measures speech clarity, feedback control, and amplification accuracy across both initial and professionally tuned configurations. Below you will find objective performance data captured using standardized acoustic testing protocols.
Dr. Steve Taddei, Au.D. — Lab Director & Reviewer
Dr. Abram Bailey, Au.D. — Fact Checker / Editor
The Sony CRE-C20 is a discreet invisible-in-ear OTC aid with strong speech clarity, best for users who prioritize conversation over media streaming.
Top 55% of OTC Hearing AidThe card below displays results for speech in quiet, speech in noise, own voice comfort, feedback handling, and music streaming. The purple SoundScore graph is the overall result, and the five graphs after it break it into individual measurements for the selected fit. Each curve shows how scores are spread across all tested hearing aids, and the dot and number mark the score for Sony CRE-C20.
Every hearing aid is lab-tested in two states — as it sounds out of the box, and after professional tuning. Switch fits to update the five metric graphs below.
How clearly speech comes through in calm, one-on-one surroundings.
Speech understanding against loud background noise — the toughest everyday test.
How natural your own voice sounds while wearing the aids, without a boomy, plugged-up quality.
Sound quality of music streamed to the hearing aids over Bluetooth.
Resistance to the whistling and squealing caused by acoustic feedback.
Lab Assessment
Quality data starts with quality recordings. HearAdvisor worked with GRAS to build a no-compromise front end so every test is repeatable and reliable.
Amplification Analysis
The graph below plots measured insertion gain against prescriptive targets across the frequency range. This visualization shows how closely the CRE-C20 amplification aligns with established fitting rationales for both initial and tuned configurations.
Audio Samples
These recordings were captured using an acoustic manikin under standardized test conditions. A reference signal is provided so you can hear how the CRE-C20 processes sound compared to the unaided original.
How this hearing aid sounds in our lab scenes. Compare it out of the box and after professional tuning.
Scene type: Conversation
164 lab recordings of this product. They demonstrate relative processing in our lab and cannot predict an individual fitting outcome.
Test Documentation
Our technicians document observations from both initial and tuned fitting sessions. Below you will find notes on device behavior, fitting parameters, and the specific test setup used during evaluation.
At initial fit with vented sleeve coupling, the Sony CRE-C20 achieved a normalized score of 3.3/5. Speech performance was modest, with speech in quiet at 2.4/5 and speech in noise at 1.3/5. Feedback handling was strong at 4.5/5, while own voice comfort measured 2.9/5. Music streaming scored 0.0/5, indicating this device does not effectively support audio streaming out of the box. The initial configuration leaves meaningful room for improvement through adjustment.
After tuning with the same vented sleeve coupling, the normalized score improved substantially to 4.2/5—a 0.9-point gain. Speech in quiet jumped to 4.1/5 and speech in noise rose to 2.7/5, both well above category averages. Feedback handling decreased slightly to 3.9/5, while own voice comfort remained at 2.9/5. Music streaming remained at 0.0/5 even after tuning, confirming this is a persistent limitation rather than a configuration issue.
Initial Fitting | Tuned Fitting | |
|---|---|---|
| Ear Coupling | Sleeve Vented | Sleeve Vented |
| Receiver | Integrated in device | Integrated in device |
| Fitting Formula | Proprietary manufacturer default | Proprietary manufacturer default |
| Listening Program | Default | Default |
| Volume Setting | 53% (Default 8/15) | 100% (Max volume) |
| Software Version | Firmware v3.1.0.15005 | Firmware v3.1.0.15005 |
| Tuning Adjustments | On-ear assessment performed, Loudness match set at +1 to balance devices binaurally, Other settings at manufacturer defaults | On-ear assessment performed, Loudness match set at +1 to balance devices binaurally, Sound balance set to +4 More Sharp, Fine tuning performed and left at "Solution 05", Other settings at manufacturer defaults |
| Notes | n/a | n/a |
