Most people who try OTC hearing aids haven’t taken a hearing test yet.
So the device needs to work right away — comfortably and safely.
So the device needs to work right away — comfortably and safely.
That means:
· Supporting the most common hearing loss patterns
· Sounding clear and natural as soon as you put it on
· Avoiding over-amplification and whistling
Research from NIH and WHO shows that over 70% of mild-to-moderate hearing loss is high-frequency sloping — especially in older adults.
In other words, most people lose higher-pitched sounds first, like consonants in speech.
In other words, most people lose higher-pitched sounds first, like consonants in speech.
A clinical analysis of 3,650 hearing-related cases found a consistent trend in users aged 41–70:
· Sloping > Flat > U-Shaped > Other Types > Rising
· And the prevalence of sloping hearing loss increases with age.

This is why most OTC hearing aids use a sloped hearing loss model as their default sound compensation.
| Hearing Type | Suitable For | Benefit |
|---|---|---|
|
High-frequency Sound Enhancement (Sloping)
|
Difficulty hearing high-pitch sounds (common age-related loss)
|
Clearer speech and brighter conversation details
|
|
All-frequency Sound Enhancement (Flat)
|
Overall, reduced hearing across all ranges
|
Natural, balanced, comfortable sound
|
|
Medium-high Frequency Sound Enhancement (U-Shaped)
|
Can hear, but speech sounds feel muffled, especially in groups
|
Voices become clearer and easier to follow
|
Not Sure Which One Fits You?
Take a quick Hearing Test in the iYeasound App — right in your ear, no clinic needed.
You’ll receive:
· A simple hearing report
· A recommended profile that fits your hearing pattern
Via iYeasound--->Me--->Hearing Test. Download iYeasound App.
Clear. Comfortable. Natural.
Yeasound is developed to FDA medical device standards with smart gain control that:
· Makes soft sounds easier to hear
· Keeps loud sounds comfortable
· Reduces whistling and feedback
So voices sound clear, not harsh. And the world feels natural, not electronic.
Coming Soon: Self-Fitting Personalization
We’re building self-fitting devices that automatically adapt to your hearing.
More personal. More precise.
More personal. More precise.








