Presentation on theme: "By Christian Chipouras"— Presentation transcript:
1 By Christian Chipouras Hearing AidsBy Christian Chipouras
2 What is a Hearing aid?A hearing aid is a device used to regulate and amplify sound for the userHearing aids are used by the partially deaf but not the completely deafThey can greatly improve the hearing of someone partially deaf but it cannot cure or help complete deafness.Placed either in and or around the earThey have 4 major parts: themicrophone, battery, amplifier,and receiver
3 HistoryLate 1700s: Early hearing aids consisting of a horn and a long thin tube that concentrated the sound to the ear were created. These were known as ear trumpetsIn the 19th century hearing trumpets were mass produced to aid the hearing impaired and partially deafIn 1898 the first carbon-type hearing aid was made due to the invention of the carbon microphone.In 1899 The first carbon-type hearing aid was patented by Miller Reese HutchinsonIn 1920 vacuum tubes were added to the hearing aids to improve sound quality and clarity.
4 History cont.In 1952 the first hearing aid with an on/off switch was created. This new model was known as a transistor hearing aidIn the 1990’s digital hearing aids were created allowing clearer and better hearing for the user2000s- much smaller hearing aids were produced and are barely visible on the user.
5 The hearing aid today Today there are 5 Major types of hearing aids Behind the ear hearing aids (BTE)-can be used for slight to nearly complete hearing lossOn the ear hearing aids(also known as mini BTE’s)- less visible version of BTE’sIn the ear hearing aids (ITE) –Very large and fits in earIn the canal hearing aids (ITC) -fits in ear canal used for mild hearing lossCompletely in canal hearing aids (CIC)- used for mild hearing loss very difficult to adjust and maintain
6 The hearing aid today cont. The newest hearing aids are small and self-adjust to allow clearer hearing. They also adjust when the user enters loud areas allowing the users inner-ear not to be harmedThe newest hearing aids can wirelessly receive sounds from electronic devices such as computers and T.V.’sThe digital hearing aid has become the main type of hearing aid used, as it is more versatile and produces clearer sounds
7 How it WorksThe hearing aid works by the microphone receiving the sound and converting the sound into electric impulses using the batteryThe hearing aid than sends the impulses to the amplifier which amplifies the impulses to the desired level and send them to the receiver.The receiver than converts the Impulses into amplified sound Waves which vibrate and stimulate the hair follicles in the inner ear to allow hearing
8 LimitationsHearing aids only amplify sounds making them useless to the deaf and nearly deafCan have problems concentrating on single sounds allowing background noises to interfereThey are visible and can cause irritation to the areas that are in contact with the deviceLoud noises can become very loud when amplifiedMany frequent hearing issuesProblems and difficulties with adjustment
9 Future of the hearing aid Complete wireless compatibilityBetter sound qualityMore efficient digital hearing aidsBetter sound distinction (between background noise and the noise trying to be heard)Ability to listen and to be compatible with cell phones and listening to music through the hearing aidsSmaller and lighter versions
10 BibliographyValente, Michael. Hearing Aids: Standards, Options, and Limitations. New York: Thieme, Web. 7 Oct 2012.Edwards, Brent. "The Future of Digital Hearing Aids." Trends in Amplification’s Special Issue on Digital Hearing Aids: 2-6. Web. 7 Oct <http://brent.edwards.name/Papers/Future_of_Digital_Hearing_Aids.pdf> ." Dillon, Harvey. Hearing Aids. New York: Thieme, Web. 7 Oct"Hearing Aid." Wikipedia. Wikimedia Foundation, 28 Sept Web. 07 Oct <http://en.wikipedia.org/wiki/Hearing_aid>."Ear Wax Museum, a History of the Hearing Industry, Hearing Aids, Assistive Listening Devices, Etc." Ear Wax Museum, a History of the Hearing Industry, Hearing Aids, Assistive Listening Devices, Etc. Starkey Labs, n.d. Web. 07 Oct<http://www.hearingcenteronline.com/museum.shtml>.Colin Blakemore and Shelia Jennett. “hearing aid.” The Oxford Companion to the Body Encyclopedia.com. 7 Oct <http://www.encyclopedia.com>.