Hearing aids Posted Date: 01 Nov 2009     Resource Type: Articles/Knowledge Sharing     Category: How things work Author: Ranjan Chowdhuri Member Level: Silver     Rating: Points: 2

A hearing aid is a sound amplifier.The earliest form was the ear trumpet which amplifies sound by collecting it with a larger mouth and leading it down a tapering tube to a narrow orifice which is inserted into the ear.A modern hearing aid is transistorized electronic device serving to amplify sound by means of electrical amplification.The sound is picked up by a microphone,which converts it into electrical currents.These are amplified and passed to the receiver, which converts them back into sound of greater loudness than the original sound.The power for the amplifier is provided by a battery which may be of the ordinary dry cell.

Responses

No responses found. Be the first to respond and make money from revenue sharing program.

Feedbacks

Popular Tags   What are tags ?   Search Tags   Sign In to add tags. Hearing aids  .

Post Feedback This is a strictly moderated forum. Only approved messages will appear in the site. Please use 'Spell Check' in Google toolbar before you submit. You must Sign In to post a response.

Next Resource: Abacus Previous Resource: Success Return to Discussion Resource Index Post New Resource Category: How things work Post resources and earn money!   More Resources Abacus How does a cell phone work Recharge Your Mobile with just a Leaf Tsunami - How Does It Work Using Remote Desktop on Windows XP & VISTA Computers ART of Parenting