Shared Flashcard Set

Details

com dis exam 3
NA
27
Dance
Undergraduate 2
05/08/2010

Additional Dance Flashcards

 


 

Cards

Term
Body aids
Definition

advantage- a lot of power with minimal feedback

- large controls

 

Disadvantages-

cosmetics

cord problems

Term
traditional behind the ear
Definition

advantages- ccosmestics

-powerful

disadvantages- micropphone on top of pinna

-prceived as old fashion

-occlusion

Term

open fit- behind the ear

 

 

 

 

Definition

advantage- cosmestic

-little or no occlusion

-same day fitting

 

disadvantages- do work for ppl with more than moderate hearing loss

- microphone on top of pinna

Term
in the ear
Definition

several sizes: full, halfshell, in the canal, completly in the canal

advantages- mic in the ear canal

 

disadvantages- delicates

may be difficult to manipulate

 

Term
microphone
Definition

-converts acoustic energy to electrical energy

-directional vs. omnidirectional

-single microphone vs. multiple microphone.

Term
analog to digital converter(A/D)
Definition
Changes electrical signal to numbers
Term
digital signla processor (DSP)
Definition
manipulates numbers to amplity/filter
Term
digital analog to convertor
Definition
changes numbes to electrical signal
Term
receiver
Definition
changes electrical energy to acoustic energy
Term
telecoil
Definition
picks up electromagnetic energy
Term
earmolds
Definition

sends sound into EAC

most hearing aids have custom earmolds:

-BTE/body aids- seperate custom earmolds, attaached to hearing aid with tubbing. 

-ITE- custom earmold molded to components

open ear BTE- hearing aids do not have custom earmolds

Term
venting
Definition

reduces occlusion effect

reduces low frequency amplification

allows person to hear unamplified sound

Term
damping
Definition

putting a filter in the earmold, earhook or tubbing

smooths frequency response

Term
horn effects
Definition
boosts high frequency amplification
Term
hearing aid process goal
Definition
to make as much speech audible w/o ever becoming uncomfortably loud
Term
output limiting
Definition

how a hearing aid cuts off from amplifying loud sounds

-traditionally done with either peak clipping or comression

-compressions is also used to automatixally vary amount of gain depending on input level. 

Term
hearing aid box test
Definition

uses 2 CC coupler to attach hearing aid to micropphone. 

-doesn't actually stimulate freq response of real ear

- can compare hearing aids response to the of spec sheet

-ANSI 3.22: standards for hearing aid measurement. 

Term
real ear measurement
Definition

sft probe tube places in EAC other end is attached to measuring microphone

- person seated near loudspeaker emitting calibrated sounds

-allows for xamination of how hearing aids function while it is on the user.

can enter the audiogram and see if hearing aid is meeting "targets"

Term
binaural benefits
Definition

localization

-quality

- bunaural summation

-emilimnates head shadow

-speech preception in noise/reverberated

-avoids auditory deprivation

* DONT reccommend binuaral hearing aids to 

-mild hearing loss

-"dead ear"

-cost

-unilateral hearing loss

Term
CROS/BiCROS
Definition

used when someone has "dead ear" and

-a normal hear (cros)

-an audible ear (BiCros)

(avoids head shadow)

Term
bone conduction hearing aids
Definition
used when ear cannot accomidate an earmold
Term
implantable bone conduction  hearing aid (baha)
Definition
used when ear cannot accomidate an earmold or w/ unilateral hearing loss
Term
programming hearing aids
Definition

based on prescriptive formula

-uses audiometric information (esp thresholds) to figure out amount of amplification at various frequencies and maximum output

Term
hearing aid fitting/orientation
Definition

fitting:- physical fit of earmolf/ hearing aid checked

-Hearing aid programed

-real-ear measurement

- parts of hearing aid

-care and maintainence

-basic troubleshooting

-normal vs. abnormal

-battery type/size

Term
hearing aid practiceing
Definition

-insertion/ removal

-finding controls-

battery removal/ insertion

-getting use to hearing aid

-patient should be accompanied by a signifigant other

-for children, parents are main focus of orientation

-all material in writing

Term
hearing aid check-up
Definition

with in first 30 days

-questions answered

-hearing aids re-programed if necessary.

-hearing aid verification

--real ear testing

--aided vs unaided testing

---functional gain

---speech understanding

-questionaires 

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