In hearing aids, the microphone converts [[1]] waves to [[2]] signals.

In hearing aids, the microphone converts sound waves to electrical signals.

Hearing aids are used by people with hearing impairments. They are electronic, battery-operated devices. They receive sound through a microphone. This microphone converts the sound waves to electrical signals. And these electrical signals are amplified by an amplifier. The amplified electrical signals are given to the speaker of the hearing aid. The speaker converts the amplified electrical signal to sound and sends it to the ear for clear hearing.