I now need hearing aids. Getting is even crazier than seeing an optometrist to get glasses. Blaming proprietary information, I have not been able to find out any detail about just what digital hearing aids can do. I have no list telling me what the algorithms can do. so that I can ask for a particular program. It should not be that complicated.
Some of what I want to know is
- How can two microphones a centimeter apart (if that much) be used to get directional behavior as claimed. At 343.2m/s, the phase change for 1000Hz is only 0.03 wavelengths. How can that be processed to provide a directional microphone behavior?
- Can I get a program to clip or limit short bursts of sound such as clanking dishes? My observation is that the pulse of noise comes along and comes through loud. What follows, speech that is the signal, get reduced gain to protect you agains loud sound that is already gone.
- Covering one of the microphones with my finger improves the quality of sound by extending the band to include sibilants. Why cannot the hearing aid program do that?
Any clues as to where useful information exists on the web or in a reasonably priced ebook would be appreciated.