Behavior Audiometry Final Flashcards
What do behavior audiological tests allow us to do?
distinguish between central and peripheral disorders
What are tone decay tests?
allows testing to find abnormally high reduction in perceived loudness of a continuous pure tone
What does an elongates rate of decay as the intensity increases indicate?
cochlear disorders
What it mean if the rate of decay is rapid without changing with increasing intensity?
retrocochlear disorders
Describe Carhart Tone Decay test procedure.
-test tone presented at 0 dB SL for 60 seconds-if it is heard for the full minute the test is complete-if not, increase intensity by 5 dB without tone interruption-restart 60 second period-if tone is till not heard increase by 5 dB again and reset timer-continue until tone is hear for the full 60 seconds of reaches limits of audiometer
Results for Carhart Tone Decay Test:
-tone decay less than or equal to 30 dB= negative for retrocochlear pathology-tone decay greater than 30 dB= positive for retrocochlear pathology
Describe the procedures for the Rosenberg Tone Decay Test.
-tone presented at threshold-start timing-tone intensity increased 5 dB each time the signal is not heard-after 60 second record the amount of decay in SL
Describe the procedure for the Owen’s Tone Decay Test.
-present tone at 5 dB SL-if hand is lowered under 60 seconds: turn off tone for 20 seconds, prior to presentation of 5 dB increased signal-upon completion of 20 second rest, reintroduce tone-test is done after presentation of 20 dB SL
Results of Owen’s Tone Decay Test (Not super important)
-Type 1 -tone heard for 60 seconds @ 5 dB SL -indicates normal or cochlear disorder-Type II-A -5 dB SL adapts prior to 60 seconds -10 dB SL tone heard for full 60 seconds -indicates cochlear dysfunction-Type II-B -5 & 10 dB SL adapts prior to 60 seconds -15 dB SL tone heard for full 60 seconds -indicates cochlear dysfunction-Type II-C -5, 10 & 15 dB SL adapts prior to 60 sec -20 dB SL tone heard for full 60 sec -indicates cochlear dysfunction-Type II-D -none of the tone heard for full 60 sec -remains audible longer period of time with each successively higher sensation level -indicates cochlear dysfunction-Type II-E -5 dB increase produces small increase in audibility time-average 4 to 7 seconds per 5 dB increase-indication cochlear or retrocochlear -Type III-5 dB increase does not increase audibility time; indication retrocochlear pathology (less than 4 sec is no change
Describe the procedure of Olsen Noffsinger Tone Decay Test.
same as Carhart’s but start presentation level at 20 dB SL
Results of Olsen Noffsinger’s Tone Decay Test.
-tone decay less than or equal to 10 dB= negative for retrocochlear pathology-tone decay greater than 10 dB= positive for retrocochlear pathology
Describe the Suprathreshold Adaptation Test.
-present tone at high intensity, 100 dB HL, for 60 seconds
Results of Suprathreshold Adaptation Test.
-tone heard entire 60 seconds= negative for retrocochlear pathology-tone heard less than 60 seconds= positive for retrocochlear pathology
What is loudness recruitment?
abnormal rapid growth in loudness
Describe the Alternating Binaural Loudness Balance (ABLB) Test.
-tone is presented alternately between the ears (fixed (normal) ear the tone intensity does not change, variable (abnormal) ear the tone intensity manipulated up and down)-patient reports when tone is louder in right ear, left ear, or equally loud
What are the types of recruitment?
-complete recruitment-hyper-recruitment-incomplete recruitment-no recruitment-decruitment
What is complete recruitment? Indication?
-loudness balances at higher intensities occur at same intensities in both ears-cochlear pathology
What is hyper-recruitment? Indication?
-loudness in abnormal ear catches up to normal ear and it becomes greater-more psychological than physiological
What is incomplete recruitment? Indication?
-results are between complete and no recruitment-inconclusive
What is no recruitment? Indication?
-levels between ears remain stable-conductive pathology
What is decruitment? Indication?
-loudness grows slower than normal rate for abnormal ear, loudness lost rather than gained as intensity is increased-retrocochlear pathology
What is simultaneous loudness balance?
-present tones to both ears at the same time-patient hears single tone fused somewhere (head, right ear, left ear)
In what situation can ABLB not be completed?
-if there is no normal hearing ear-when sensorineural hearing loss is present bilaterally
What is AMLB? Procedure?
-Alternate Monaural Loudness Balance-loudness balance completed with 2 different tones within same ear-intensity level fixed for on frequency other is varied
What is Loudness Discomfort Level? Normal range? Indications?
-used to determine presence of recruitment-90 to 105 dB HL-normal level LDLs= cochlear impairment-LDLs above norms= retrocochlear pathology
What is Intensity Difference Limen (IDL)?
smallest difference in intensity that can be perceived
What is Short Increment Sensitivity Index (SISI)? Results?
-present increments of predetermined size, patient must indicate if they can hear the changes-high % of increments= cochlear disorder-low % of increments= retrocochlear disorder, conductive loss, normal hearing
What is Bekesy Audiometry?
-evaluates 1 frequency at a time-intensity creases and decreases at rate of 2.5 dB/second
Types of Bekesy Audiograms (not important)
-type 1 bekesy audiogram-pulsed and continuous tone tracings interwoven-10 dB tracing width -follows pattern of pt’s audiogram -indication-normal hearing-conductive HL -type 2 bekesy audiogram-pulsed and continuous tracings interwoven up to approx 1000 Hz -2 things occur at high freq-continuous tracing falls below pulsed tracing -amount less than 20 dB -decrease runs parallel to pulsed -continuous tracing shifting due to tone decay-continuous tracing narrow to 3-5 dB wide -narrowing due to intensity DL around threshold-does not identify loudness recruitment -indication-cochlear dysfunction -presbycusis -sensorineural HL -idiopathic-type 3 bekesy audiogram -continuous tracing falls very quickly from pulsed tracing -often to limits of audiometer -indication-retrocochlear pathology -type 4 bekesy audiogram-continuous tracing quickly falls more than 20 dB below pulsed audiogram -decrease runs parallel to pulsed tracing -equivocal indication-cochlear dysfunction -retrocochlear pathology-primary indication -type 5 bekesy audiogram-pulsed tracing falls below continuous -pulsed tracing shifts due to effects of loudness memory-pulsed tracing requires more intensity than continuous tracing for equalloudness -indication-functional hearing loss
What is Forward-Backward/Reverse Bekesy Audigram?
-3 tones traced-pulsed tracing- 200 to 8000 Hz -continuous tracings- 200 to 8000 Hz -continuous tracing- 8000 to 200 Hz-difference between continuous and pulsed tracings on sweep-frequency can be larger when frequency goes from high to low than low to high -difference called forward-backward discrepancy-large forward-backward discrepancies -indicate retrocochelar pathology
What is Bekesy audiometry most sensitive to?
cochlear dysfunction
