I am with you guys on the price of hearing aids. I know that hearing aids are not just amplifiers of sound because most of us have hearing loss of certain frequencies. Therefore these frequencies either need to be amplified or these frequencies need to be modified so that they are a different frequency that we can hear.

You could amplify 5 khz until it ruptured my ear drum and I still would not hear it. But if the frequency was shifted down to 1000 hz I could hear it fine although it would not sound like a 5 khz tone.

In some situations, I would like to have a hearing aid that I could select a frequency band and then have that band shifted into a range of frequencies that I could hear. Also there are times when low frequencies (like around motors) just drown out the higher frequencies. This would be a time that I would like to just block these low frequencies.

With all the technology that we have we should be able to get hearing aids like this for a couple of hundred or less dollars.