Abstract:
OBJECTIVE:To determine whether tympanic membrane (TM) electrodes induce behavioral pure-tone threshold shifts. DESIGN:Pure-tone thresholds (250 to 8000 Hz) were measured twice in test (n = 18) and control (n = 10) groups. TM electrodes were placed between first and second threshold measurements in the test group, whereas the control group did not receive electrodes. Pure-tone threshold shifts were compared between groups. The effect of TM electrode contact location on threshold shifts was evaluated in the test group. RESULTS:TM electrodes significantly increased average low-frequency thresholds, 7.5 dB at 250 Hz and 4.2 dB at 500 Hz, and shifts were as large as 25 dB in individual ears. Also, threshold shifts did not appear to vary at any frequency with TM electrode contact location. CONCLUSIONS:Low-frequency threshold shifts occur when using TM electrodes and insert earphones. These findings are relevant to interpreting electrocochleographic responses to low-frequency stimuli.
journal_name
Ear Hearjournal_title
Ear and hearingauthors
Smith SB,Lichtenhan J,Cone Bdoi
10.1097/AUD.0000000000000275subject
Has Abstractpub_date
2016-07-01 00:00:00pages
e273-5issue
4eissn
0196-0202issn
1538-4667journal_volume
37pub_type
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