Loading presentation...

Present Remotely

Send the link below via email or IM

Copy

Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

DeleteCancel

Make your likes visible on Facebook?

Connect your Facebook account to Prezi and let your likes appear on your timeline.
You can change this under Settings & Account at any time.

No, thanks

The Physics of Hearing Aids

No description
by

Jennifer Tarnay

on 9 July 2013

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of The Physics of Hearing Aids

You May find Interesting...
The Physics of
Hearing Aids

there are an estimated Americans with hearing loss
28 million
Physics concepts
The History
impact
Belham N. Andy (12) The Practical Physics of Hearing Aids, 305, 1569-1570
tecnology/hearing-aid.htm
American Speech Language- Hearing Association (1997) Retreived May21/2012
http://www.asha.orh/public/hearing
/treatment/aid-myth-fact.htm
References...
You can lose your hearing in 1 of 2 ways..
Coductive hearing loss
Sensorineural hearing loss
1.
2.
when sound doesn't get to your cochlea
When Cochlea themselves are damaged
Hearing loss starts to decrease the ability to hear sounds above approx. 2000 Hz.
A Little Bit About the Ear
Sound travels through opening of outer ear and vibrates eardrum
3 small bones carry to which stimulates hair cells that send signals to your brain
Cochlea
but first
the first trial of hearing aids were just microphones for everyone in the room
next they tried walkie talkies but there was a lack of privacy
Effects of people aged 55 and over
improved the quality of life
86%
So much variety!
Behind the ear
Receiver in the canal
Ear molds
Invisible
Open fit
disposable
bone anchored
Eye glass
The first hearing aids were enormous trumpet shaped
Alexander Graham Bell electronically amplified sound using a carbon microphone and battery this was adapted in the manufacturing
In 1886, Thomas Edison invented the carbon transmitter, which changed sounds into electrical signals that could travel through wires and be converted back into sounds
For the estimated 28 million Americans with hearing loss, life is a series
of missed opportunities
Frustrated friends and family members will just give up on communicating altogether
Hearing aids are fairly simple devices, consisting of four basic parts:
A microphone picks up sound from the environment and converts it into an electrical signal,
which it sends to the amplifier.
An amplifier increases the volume of the sound and sends it to the receiver.
A receiver/speaker changes the electrical signal back into sound and sends it into the ear.
Then those impulses are sent to the brain.
A battery provides power to the hearing aid
The Digital Hearing Aid
Full transcript