Portland State University. Department of Speech Communication
Thomas G. Dolan
Date of Publication
Master of Science (M.S.) in Speech and Hearing Sciences
Hearing aids, Transients (Electricity), Evoked response audiometry
1 online resource (46 p.)
The purpose of this study was to determine whether the compression circuit of a hearing aid could be activated by a high frequency biasing tone such that its output for a transient stimulus could be made to approximate that of a continuous tone alone. Sufficient compression activation by a transient stimulus would mean that this type of hearing aid could be used in obtaining aided ABR measurements, since transient stimuli are commonly used for this procedure. Four hearing aids were used, and transient or continuous stimuli were introduced either alone or in combination with an 8 or 10 kHz biasing tone. The biasing tone was either held at one constant level or varied in intensity along with the transient or continuous signal.
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Gregory, Carol Ann, "Output of compression hearing aids with transient and continuous input stimuli" (1991). Dissertations and Theses. Paper 4174.