Questions, not an issue

[malaki86]

My stepdaughter has severe to profound hearing loss, especially in some frequency ranges. What I'm wanting to do is to build an ESP-32 board, with a MEMS microphone (would actually prefer 2 for spatial sound, if possible). The ESP-32 would then transmit via A2DP Bluetooth to headphones or earbuds, as streaming audio. Standalone earbuds with a hearing-aid function do help some. I stumbled upon this library in my searches and it looks like the most promising library I've came across.

The frequency range that she can still hear is in a certain range, but not above or below. For example, she can hear a babies "I'm hungry" cry, but not a babies "I'm in severe pain" cry. Low-frequencies are also severely limited.

As I was typing this, I started asking her questions about the devices that she has used in the past, which were all basically just amplifiers. These DID help her hear the sounds that she couldn't hear without the device, such as a microwave beeping, but made things that she normally CAN hear being too loud. That made me think of an equalizer, with raising the frequencies that you want louder, and lowering the frequencies that you don't want amplified.

So, what I'm wondering - would I have the ability to use this library, coupled with the hardware I mentioned to at least "help" her hear?

[s60sc]

The bandpass filter with a high Q factor will amplify a narrow range of frequencies and can be cascaded to increase the peak, youll need to experiment. Use more powerful ESPS3 rather than ESP32 to minimise delay between input audio and filtered output audio. ESP supports bluetooth but I've never used it, could try this library