Exam (elaborations)
CD 444 Exam 2: Questions With Precise Solutions
- Course
- Institution
CD 444 Exam 2: Questions With Precise Solutions
[Show more]
Content preview
CD 444 Exam 2: Questions With Precise SolutionsHearing aids amplify Right Ans - frequencies where hearing loss occurs
(not give back normal hearing) (output can never exceed loudness discomfort
level)
HA ideally Right Ans - make soft sounds audible, average sounds
comfortable, and loud sounds tolerable
Gain Right Ans - the amount by which a signal is amplified (output - input =
gain)
Frequency response Right Ans - the frequency region amplified by hearing
aid (only where hearing loss occurs)
Dynamic range of hearing Right Ans - range of hearing between threshold
and loudness discomfort level, range of usable hearing
People with SNHL often have Right Ans - reduced loudness tolerance
Normal dynamic range of hearing Right Ans - 110 dB LDL - 0 dB threshold
= 110 dB DR
Reduced dynamic range Right Ans - 95 dB LDL - 55 dB threshold = 40 dB
DR
Normal listener can Right Ans - use sound occurring between 0 dB and 110
dB or over a range of 110 dB
Hearing aid components Right Ans - input - microphone - amplifier -
receiver - output
Input signal is Right Ans - picked up by microphone which converts it from
acoustic to electric or digital signal
Signal is Right Ans - amplified
Receiver converts Right Ans - signal back to acoustic energy
, Output signal is Right Ans - delivered into ear canal
Analog Right Ans - traditional transistorized electronic circuits, no longer
commonly used
Digital Right Ans - microchip based technology
(programmed to fit individual HL using computer technology, can have
multiple memories for different listening environments, can process sound in
ways that are much more sophisticated than analog hearing aids, some can be
used with remote controls or other wireless accessories, range of costs and
options)
In the ear HA Right Ans - full shell, in the canal, completely in canal
Behind the ear HA Right Ans - traditional with ear mold, newer design with
slim tube and rip or RIE
Behind the ear with ear mold Right Ans - instrument fits behind the ear
and connects to an earmold that fits in the ear, armold is custom made for
individual
ear mold styles and material are chosen depending on Right Ans - degree of
hearing loss and personal preference
ear molds have to be Right Ans - replaced frequently (made from
impression of person's ear, children outgrow them, changes in weight can
affect fit)
HA can come in Right Ans - variety of colors
BTE HA Right Ans - can fit a wide range of HA, most powerful HA (severe to
profound HL), used most for children, lowest repair rate, has longest life
expectancy
slim tube or receiver in ear Right Ans - used by BTE technology instead of
traditional ear molds (less visible, does not have to be custom ordered, more
natural sound quality)
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Studyhall. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
78252 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now