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Glossary of Practice Qs

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Created by sabn1987

Describe (in words and/or graphs) the transfer of sound pressure from free field to the i) cochlea, ii) ear canal (at TM) without the pinna and concha, and iii) concha and ear canal combined.
1
Describe (in words and/or graphs) the function of the middle-ear system (include its sound transfer characteristics).
2
Describe (words and/or graphs) the BM motion to tones of i) high frequency (eg 4000 Hz), and ii) low frequency (eg 250 Hz). Discuss this in term of i) BM displacement amplitude, ii) phase/time, and iii) underlying physics/physiology.
3
The motion of the BM is not always linear. Describe (in words and/or graphs) input-output functions for a tone at the CF of a particular BM location vs. that for a tone lower than the CF. What are the consequences of the non-linearity? What happens to the
4
Provide behavioural and physiologic evidence obtained from living humans that the cubic distortion product exists in normal hearing.
6.
Draw and label the 3 "cochlear" potentials which might be seen in response to a 1000-Hz tone of 10-ms duration. What are the effects of stimulus intensity on the amplitude on one of these potentials?
7.
Describe how neural (eg for a single 8th nerve) tuning curves are obtained. Draw tuning curves (label x & y axes) for a high frequency fibre (eg 10000 Hz) vs a lower frequency fibre (eg 1500 Hz).
8
Describe the afferent and efferent neural connections between the central nervous system and the cochlea.
11
Describe how i) stimulus intensity, and ii) stimulus frequency are coded within the auditory system (or at least within the cochlea and 8th nerve.)
12
What are auditory evoked potentials? Outline the auditory evoked potentials originating from the 8th nerve, the brainstem, and the auditory cortex that may be recorded non-invasively from humans. Describe the current clinical use of one of these.
13
Describe the effects of stimulus exposure factors on temporary and/or permanent threshold shifts (TTS/PTS). Specifically, outline the effects of i) stimulus level, ii) duration of exposure, iii) stimulus fq spectrum, and iv) temporal pattern of exposure s
14

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