Hearing Aid Amplifier Circuit Diagram. Glad i could help you i hope our website is useful to you. R1 2 2k r2 680k r3 3 3k r4 220k r5 1 5k r6 220r r7 100k r8 680k c1 104pf.

The sensitivity of the detection section and the on time duration of the sound amplifier circuit can be set by the user. Also the circuit uses only a single condenser mic for sound detection and amplification. So look at the second circuit below.

Here is an inexpensive hearing aid circuit that uses just four transistors and a few passive components.

For this you may use two small 1 5v cells. But this circuit is not suitable for true using. The sensitivity of the detection section and the on time duration of the sound amplifier circuit can be set by the user. The figure below shows a very simple and easy to build hearing aid that can also be used for above describe purposes.