IHS STUDY EXAM QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED
ANSWERS) |ALREADY GRADED A+
Case History - correct answer -medical history
-lifestyle and vocational info
-impact of hearing loss on communication
-family concerns
-preferences regarding hearing instrument
Helps build report
Primary goal is to identify any issues requiring medical refferal
Red Flags - correct answer -Visible congenital or traumatic deformity of the outer ear
- History of active drainage from ear within last 90 days.
-History of sudden or rapidly progressing hearing loss in the last 90 days
-Acute or chronic dizziness
-Unilateral hearing loss of sudden or recent onset with in 90 days
-Audiometric air-bone gap equal to or greater than 15 db at 500, 1000, and 2000Hz
-visible evidence of significant cerumen accumulation of a foreign body in the ear canal
-Pain or discomfort in the ear
Drainage, ear pain or discomfort, dizziness/ vertigo and aural fullness sometimes require
medical clearance prior to fitting. Note if previously treated for symptoms` - correct answer
Bracing (Bridge and bracing) - correct answer Making the hands and the instrument become
one single unit.
-Used to prevent accidental damage or injury to the ear
pg 82 in book for description of technique
If patient comes in with an outside audiogram it is necessary to verify the audiometric data to
determine pre-fitting. - correct answer
The primary goal of retesting - correct answer to obtain accurate and comprehensive info
about the individual and the impact of the hearing loss, as well as the expectations and attitude
toward remediation options
A comprehensive hearing test inculdes - correct answer Pure tone air and bone conduction
audiometry and a battery of speech tests that includes:
,IHS STUDY EXAM QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED
ANSWERS) |ALREADY GRADED A+
-Speech Recognition or Speech Recognition Thresholds (SRT)
-Most comfortable listening level (MCL)
-Uncomfortable Listening level (UCL)
-Word Recognition testing (WR)
-Speech in noise testing
some may include tympanometry and acoustic reflex measures
Pre- Audiometric Assessment - correct answer -Case history about patients medical history as it
relates to the auditory system,
-reports about their hearing challenges,
-info concerning their lifestyle and activities.
-Self- assessment questionnaire
Audiometry - correct answer The measure of hearing sensitivity.
Thresholds represent auditory acuity and are defined as the softest intensity levels at which a
patient can hear 50% of the time.
-Pure tone air "air scores" and bone conduction "bone scores" thresholds are recorded for each
ear
- this graph is called an audiogram
- The word " scores is discouraged in the context of PTA the correct term is " Thresholds"
Speech Recognition Threshold (SRT) - correct answer Threshold to which uses speech as a test
signal
Threshold measurements require - correct answer objective, psychophysical procedure to
determine auditory acuity.
Suprathresholds - correct answer the presentation level louder than the threshold.
-WR-uses speech
-MCL-using speech
-UCL-uses pure tones, can also use speech
,IHS STUDY EXAM QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED
ANSWERS) |ALREADY GRADED A+
Word recognition - correct answer provides a measure of speech understanding ability in terms
of percent correct,
-typically preformed at 40 db SL (sensation level)
-aka speech discrimination
Audiometer - correct answer a sound generator that produces pure tones which are presented
at various frequencies and levels in order to measure thresholds and generate an audiogram
-must be calibrated at least annually
Audiogram - correct answer -simple graph that displays hearing threshold levels as a function of
frequency.
-vertical lines- frequency Hz (left to right from 125 or 250 Hz to 8000Hz)
-Horizontal line- pure tones in dB hearing level (dB HL) from -10 to 110 or 120 db HL
Octave frequencies: 250, 500,1000, 2000, 4000, and 8000 Hz.
interoctave frequencies: 750, 1500, 3000 and 6000
- The best practices require that hearing thresholds be measured for ALL octave and interoctave
audiometric frequencies...
Prescriptive fitting formulas - correct answer targets include octave as well as interoctave
frequencies through 6000Hz.
It is often taught that thresholds need to measured for the interoctave frequencies only when
thresholds between adjacent octaves differ by 20dB or more.
However.. since fitting targets are prescribed for audiometric frequencies and since adherence
to a standardized, consistent approach to fitting hearing instruments increases wearer
satisfaction and benefit, the recommended audiometric procedure is to measure thresholds at
octave and interoctave frequencies. SHORTCUTS not acceptable
Octave - correct answer doubling of frequencies.
- interoctave frequencies occur at the mid point of each octave.
, IHS STUDY EXAM QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED
ANSWERS) |ALREADY GRADED A+
earphones are calibrated specifically for one audiometer and can not be switched between
audiometers. - correct answer
Insert ear phones - correct answer - are recommended for audiometric testing.
-The signal travels from the audiometer to the receiver box (typically clipped to patients
clothes) via a tube.
Supra aural or circumaural earphones - correct answer -AKA (TDH- telephonics dynamic
Headphones)
-held in place using an adjustable headband.
-Always tilt from front to back to check that diaphragm (center) is placed over concha
Advantages of insert vs TDH - correct answer -greater interaural attenuation bc less sound is
leaking around the head to the other ear ad there is less earphone material touching the head.
-better patient comfort
-better sanitation and infection control (foam used once and thrown away)
-Collapsed canals are less likely to impact threshold measures
Inserts should not be used - correct answer -with a patient who has very soft or liquid cerumen
or drainage could become blocked or plugged.
-patients with very small ear canals may find them uncomfortable.
Biologic check and calibration - correct answer -a biologic check must be preformed at the
beginning of every work day.
Calibrations must be preformed by a technician. ANNUAL.
low frequencies are processed at the apical turn of the cochlea
high frequencies are processed at the basal turn of the cochlea - correct answer
Air conduction symbols are placed on the intersection of frequency tested and the intensity
that represents the thresholds.
Bone conduction is placed? - correct answer The bone conduction symbols are placed to the
right or left of the frequency line next to the air conduction symbol present
Air Conduction (AC) - correct answer is a precise procedure that has validity, reliability and is
standardized among all hearing health care prof.
-present 1000 at 40dB , if no response go to 60dB, go in 20dB till initial response
ANSWERS) |ALREADY GRADED A+
Case History - correct answer -medical history
-lifestyle and vocational info
-impact of hearing loss on communication
-family concerns
-preferences regarding hearing instrument
Helps build report
Primary goal is to identify any issues requiring medical refferal
Red Flags - correct answer -Visible congenital or traumatic deformity of the outer ear
- History of active drainage from ear within last 90 days.
-History of sudden or rapidly progressing hearing loss in the last 90 days
-Acute or chronic dizziness
-Unilateral hearing loss of sudden or recent onset with in 90 days
-Audiometric air-bone gap equal to or greater than 15 db at 500, 1000, and 2000Hz
-visible evidence of significant cerumen accumulation of a foreign body in the ear canal
-Pain or discomfort in the ear
Drainage, ear pain or discomfort, dizziness/ vertigo and aural fullness sometimes require
medical clearance prior to fitting. Note if previously treated for symptoms` - correct answer
Bracing (Bridge and bracing) - correct answer Making the hands and the instrument become
one single unit.
-Used to prevent accidental damage or injury to the ear
pg 82 in book for description of technique
If patient comes in with an outside audiogram it is necessary to verify the audiometric data to
determine pre-fitting. - correct answer
The primary goal of retesting - correct answer to obtain accurate and comprehensive info
about the individual and the impact of the hearing loss, as well as the expectations and attitude
toward remediation options
A comprehensive hearing test inculdes - correct answer Pure tone air and bone conduction
audiometry and a battery of speech tests that includes:
,IHS STUDY EXAM QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED
ANSWERS) |ALREADY GRADED A+
-Speech Recognition or Speech Recognition Thresholds (SRT)
-Most comfortable listening level (MCL)
-Uncomfortable Listening level (UCL)
-Word Recognition testing (WR)
-Speech in noise testing
some may include tympanometry and acoustic reflex measures
Pre- Audiometric Assessment - correct answer -Case history about patients medical history as it
relates to the auditory system,
-reports about their hearing challenges,
-info concerning their lifestyle and activities.
-Self- assessment questionnaire
Audiometry - correct answer The measure of hearing sensitivity.
Thresholds represent auditory acuity and are defined as the softest intensity levels at which a
patient can hear 50% of the time.
-Pure tone air "air scores" and bone conduction "bone scores" thresholds are recorded for each
ear
- this graph is called an audiogram
- The word " scores is discouraged in the context of PTA the correct term is " Thresholds"
Speech Recognition Threshold (SRT) - correct answer Threshold to which uses speech as a test
signal
Threshold measurements require - correct answer objective, psychophysical procedure to
determine auditory acuity.
Suprathresholds - correct answer the presentation level louder than the threshold.
-WR-uses speech
-MCL-using speech
-UCL-uses pure tones, can also use speech
,IHS STUDY EXAM QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED
ANSWERS) |ALREADY GRADED A+
Word recognition - correct answer provides a measure of speech understanding ability in terms
of percent correct,
-typically preformed at 40 db SL (sensation level)
-aka speech discrimination
Audiometer - correct answer a sound generator that produces pure tones which are presented
at various frequencies and levels in order to measure thresholds and generate an audiogram
-must be calibrated at least annually
Audiogram - correct answer -simple graph that displays hearing threshold levels as a function of
frequency.
-vertical lines- frequency Hz (left to right from 125 or 250 Hz to 8000Hz)
-Horizontal line- pure tones in dB hearing level (dB HL) from -10 to 110 or 120 db HL
Octave frequencies: 250, 500,1000, 2000, 4000, and 8000 Hz.
interoctave frequencies: 750, 1500, 3000 and 6000
- The best practices require that hearing thresholds be measured for ALL octave and interoctave
audiometric frequencies...
Prescriptive fitting formulas - correct answer targets include octave as well as interoctave
frequencies through 6000Hz.
It is often taught that thresholds need to measured for the interoctave frequencies only when
thresholds between adjacent octaves differ by 20dB or more.
However.. since fitting targets are prescribed for audiometric frequencies and since adherence
to a standardized, consistent approach to fitting hearing instruments increases wearer
satisfaction and benefit, the recommended audiometric procedure is to measure thresholds at
octave and interoctave frequencies. SHORTCUTS not acceptable
Octave - correct answer doubling of frequencies.
- interoctave frequencies occur at the mid point of each octave.
, IHS STUDY EXAM QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED
ANSWERS) |ALREADY GRADED A+
earphones are calibrated specifically for one audiometer and can not be switched between
audiometers. - correct answer
Insert ear phones - correct answer - are recommended for audiometric testing.
-The signal travels from the audiometer to the receiver box (typically clipped to patients
clothes) via a tube.
Supra aural or circumaural earphones - correct answer -AKA (TDH- telephonics dynamic
Headphones)
-held in place using an adjustable headband.
-Always tilt from front to back to check that diaphragm (center) is placed over concha
Advantages of insert vs TDH - correct answer -greater interaural attenuation bc less sound is
leaking around the head to the other ear ad there is less earphone material touching the head.
-better patient comfort
-better sanitation and infection control (foam used once and thrown away)
-Collapsed canals are less likely to impact threshold measures
Inserts should not be used - correct answer -with a patient who has very soft or liquid cerumen
or drainage could become blocked or plugged.
-patients with very small ear canals may find them uncomfortable.
Biologic check and calibration - correct answer -a biologic check must be preformed at the
beginning of every work day.
Calibrations must be preformed by a technician. ANNUAL.
low frequencies are processed at the apical turn of the cochlea
high frequencies are processed at the basal turn of the cochlea - correct answer
Air conduction symbols are placed on the intersection of frequency tested and the intensity
that represents the thresholds.
Bone conduction is placed? - correct answer The bone conduction symbols are placed to the
right or left of the frequency line next to the air conduction symbol present
Air Conduction (AC) - correct answer is a precise procedure that has validity, reliability and is
standardized among all hearing health care prof.
-present 1000 at 40dB , if no response go to 60dB, go in 20dB till initial response
