IHS Exam Questions And Answers Already Graded A+
In general, mold modifications are as follows:
Venting affects lows, damping the midrange and horn effects boost highs.
Basic verification involves:
checking MCL and UCL in quiet and noise.
Sound field is
a controlled environment
T...
IHS Exam Questions And Answers Already Graded
A+
In general, mold modifications are as follows:
Venting affects lows, damping the midrange and horn effects boost highs.
Basic verification involves:
checking MCL and UCL in quiet and noise.
Sound field is
a controlled environment
The configuration and height of the tympanogram can be a factor in deciding the proper matrix for
the fitting of a hearing aid:
A high Type A tells us to decrease the output by 2-3 dB
You cannot use feedback checks when
checking the telephone coil
Verification procedures:
Check the accuracy of your fitting.
The problems produced by excessive ambient noise are
greater for the lower frequencies than the higher frequencies
The decibel is
a ratio between two intensities
REUR measurement are taken in
an open human ear canal
When a hearing aid is dead, you can check the receiver and microphone function by:
turning on the instrument telecoil
The dividing line between the external and middle ear is the
tympanic membrane
The cochlea, acting as a frequency analyzer, distributes acoustic stimuli to places along the basilar
membrane according to frequency. This forms the basis of a hypothesis called the:
Place Theory
An organic disorder is when there is damage to:
The hearing mechanism, the neural pathways and the brain.
,The speed of sound in air, in feet per second, is :
1100
Properly selected hearing instruments should allow:
The patient to wear an instrument at a comfortable loudness level, improved communication and
have better hearing aided.
Crystal microphones and receivers:
are very fragile
Which of the following is not a coupler used for measuring hearing aid performance?
Zwisks Ear Simulator
Small diameter tubing of SIA hearing aids has the effect of :
reducing the high frequency gain
The function of a microphone is to :
convert acoustic energy into electrical energy
Vent an earmold :
is the most common modification made on an earmold
When a new hearing instrument has feedback at the patients comfortable level, the problem is
usually:
too much wax in the ear canal
With SIE-S hearing aids:
The only signal is from the hearing aid and phrase effects from a vent are not an issue.
The most comfortable level is:
About 45 dB HL or 65 dB SPL for normal ears
Any complex sound can be broken down into individual frequencies by a technique known as:
Fourier Spectral analysis
The adult ear canal:
rises upward and forward, then descends to the drum.
An effective verification is:
a measure able improvement in communication
Which of the following is not included in correct test protocols?
plugging the hearing aid vent to control feedback
, Most conducive losses:
Are medically correctable, display a breakdown or obstruction in middle ear and display good
discrimination
The T position on a hearing aid switch can be used to
amplify a telephone conversation, couple hearing aid into a loop inductor, couple directly into the
audio of a radio or tv
The following components can change or modify the frequency response of a hearing instrument:
a microphone
Afferent fibers:
transmit from the cochlea to the brain.
User satisfaction must include:
patient preferences
The following measurements use SPL as a reference:
Probe microphones, sound field aided thresholds, and ANSI specifications
Speech discrimination tests:
approximate a sample of speech sounds in an ordinary conversation.
A formant is:
a frequency region within a complex tone where certain harmonics have relatively large energy.
Malingering is a category of :
non organic loss
Bone conduction threshold worse than air conduction thresholds may be caused by :
poor placement of vibrator, skull fracture, thickness of skull
Part of the basic law of electrical energy is :
protons attract electrons
Some patients with binaural amplification can experience:
degredation effect
The scala tympani is filled with:
perilymph
The following is a transducer:
electret microphone
Voordelen van het kopen van samenvattingen bij Stuvia op een rij:
Verzekerd van kwaliteit door reviews
Stuvia-klanten hebben meer dan 700.000 samenvattingen beoordeeld. Zo weet je zeker dat je de beste documenten koopt!
Snel en makkelijk kopen
Je betaalt supersnel en eenmalig met iDeal, creditcard of Stuvia-tegoed voor de samenvatting. Zonder lidmaatschap.
Focus op de essentie
Samenvattingen worden geschreven voor en door anderen. Daarom zijn de samenvattingen altijd betrouwbaar en actueel. Zo kom je snel tot de kern!
Veelgestelde vragen
Wat krijg ik als ik dit document koop?
Je krijgt een PDF, die direct beschikbaar is na je aankoop. Het gekochte document is altijd, overal en oneindig toegankelijk via je profiel.
Tevredenheidsgarantie: hoe werkt dat?
Onze tevredenheidsgarantie zorgt ervoor dat je altijd een studiedocument vindt dat goed bij je past. Je vult een formulier in en onze klantenservice regelt de rest.
Van wie koop ik deze samenvatting?
Stuvia is een marktplaats, je koop dit document dus niet van ons, maar van verkoper LectDan. Stuvia faciliteert de betaling aan de verkoper.
Zit ik meteen vast aan een abonnement?
Nee, je koopt alleen deze samenvatting voor €10,87. Je zit daarna nergens aan vast.
