
Sontro Soundwave Expert Review
HearAdvisor's independent lab tested the Sontro Soundwave behind-the-ear OTC hearing aid across five performance metrics. This review presents our measured findings for both Initial and Tuned fit conditions.

Quality data starts with quality recordings. HearAdvisor worked with GRAS to build a no-compromise front end so every test is repeatable and reliable.

Lab Assessment
Our Verdict on the Sontro Soundwave
The verdict below summarizes how the Sontro Soundwave performed across our standardized hearing aid tests. We evaluate where this mid-priced OTC device showed strengths and where measurements revealed limitations.
The Sontro Soundwave offers above-average own voice quality and solid speech clarity in quiet, best for budget-conscious users prioritizing conversation over streaming.
- Strong own voice naturalness3.6/5, +1.11 vs category
- Solid speech in quiet environments3.1/5
- Above-average value for mid-priced OTC tier
- No music streaming capability0.0/5
- Below-average feedback handling2.5/5, -2.03 vs category
- Low speech-in-noise performance1.2/5
Fit Conditions
Sontro Soundwave Test Configurations
We measured the Sontro Soundwave in both Initial and Tuned fit conditions. Select either configuration below to view how amplification and performance metrics changed between the out-of-box state and after adjustment.
In initial fit testing with an open dome, the Sontro Soundwave achieved a normalized score of 2.8/5. Own-voice comfort was excellent at 4.6/5, and feedback handling was strong at 4.7/5. However, speech benefit was limited, with speech in quiet at just 1.1/5 and speech in noise at 0.4/5. Music streaming scored 0.0/5. This configuration prioritizes comfort and stability over speech audibility.
What is HearAdvisor's Initial Fit?
The Initial Fit approximates the most likely settings and eartips for a typical moderate hearing loss. Results are measured across the same 72 acoustic scenes in our custom-built lab, then scored on a 5-star scale using an auditory model.
Performance Metrics
Sontro Soundwave Score Breakdown
Our lab measures five distinct aspects of hearing aid performance using standardized test protocols. The card below displays how the Sontro Soundwave scored on speech clarity, noise handling, own-voice comfort, streaming quality, and feedback control.
Amplification Analysis
Sontro Soundwave Insertion Gain Measurements
The graph below shows real-ear insertion gain measured on our test manikin at different frequencies. Comparing the measured output against prescriptive targets reveals how closely the Soundwave matches recommended amplification levels.
Audio Samples
Hear the Sontro Soundwave Output
These recordings capture what our test manikin detected while wearing the Sontro Soundwave during controlled speech presentations. Compare the aided samples against our unaided reference to assess the processing applied by this device.

Test Documentation
Sontro Soundwave Lab Configuration Details
The documentation below records the specific settings, equipment, and conditions used during our Sontro Soundwave evaluation. This information supports transparency and allows comparison with other tested devices.
Initial Fitting | Tuned Fitting | |
|---|---|---|
| Ear Coupling | Open Dome | Tulip Dome |





