STUVIA 2024/2025
Diagnostics exam 1
- the number of dB "lost" in the process of signal crossover
- the intensity of a sound reaching the NTE is less than what was originally presented to the TE
because it takes a certain amount of energy to transmit the signal across the head - ✔✔Interaural
attenuation
-150 to +50 daPa in adults and children - ✔✔peak pressure
15-25 dB- slight
26-40 dB- mild
41-55 dB- moderate
56-70 dB- moderately-severe
71-90 dB- severe
91+ dB- profound - ✔✔Goodman degree classification
250 Hz - 20
500 Hz- 15
1000 Hz- 10 - ✔✔Occlusion effect for IML for BC
%
40 dB/60 dB/0 dB - ✔✔Average IA value for headphones, inserts, bone conduction
50% or greater decay in first 5 seconds - ✔✔When is the acoustic reflex decay present?
92-100% - excellent
84-90% - very good
78-82% - good
70-76% - fair
60-68% - poor
<60% - very poor - ✔✔WRS Interpretation
ABG (TE) greater than or equal to 15 dB - ✔✔When do you mask for bone conduction?
ABG greater than 10 dB with elevated air and normal bone conduction - ✔✔Conductive loss
ABG greater than 10 dB with elevated bone conduction and elevated air conduction - ✔✔Mixed loss
abnormally low if less than 0.2 - ✔✔gradient
Acoustic reflexes absent - ✔✔Conductive moderate degree/moderately severe degree
stuvia
Diagnostics exam 1
- the number of dB "lost" in the process of signal crossover
- the intensity of a sound reaching the NTE is less than what was originally presented to the TE
because it takes a certain amount of energy to transmit the signal across the head - ✔✔Interaural
attenuation
-150 to +50 daPa in adults and children - ✔✔peak pressure
15-25 dB- slight
26-40 dB- mild
41-55 dB- moderate
56-70 dB- moderately-severe
71-90 dB- severe
91+ dB- profound - ✔✔Goodman degree classification
250 Hz - 20
500 Hz- 15
1000 Hz- 10 - ✔✔Occlusion effect for IML for BC
%
40 dB/60 dB/0 dB - ✔✔Average IA value for headphones, inserts, bone conduction
50% or greater decay in first 5 seconds - ✔✔When is the acoustic reflex decay present?
92-100% - excellent
84-90% - very good
78-82% - good
70-76% - fair
60-68% - poor
<60% - very poor - ✔✔WRS Interpretation
ABG (TE) greater than or equal to 15 dB - ✔✔When do you mask for bone conduction?
ABG greater than 10 dB with elevated air and normal bone conduction - ✔✔Conductive loss
ABG greater than 10 dB with elevated bone conduction and elevated air conduction - ✔✔Mixed loss
abnormally low if less than 0.2 - ✔✔gradient
Acoustic reflexes absent - ✔✔Conductive moderate degree/moderately severe degree
stuvia
