1. Copyright © American Speech-Language-Hearing Association
From: Gap Detection Methods for Assessing Salicylate-Induced Tinnitus and Hyperacusis in Rats
Am J Audiol. 2008;17(2):S185-S192. doi: / (2008/ )
Legend:
Gaps of 50 ms are embedded in a background stimulus before inducing a startle reflex. Continuous background signals tested include broadband noise (BBN) and 1000-Hz bandwidth filtered noise centered at 4, 8, 10, 12, 16, 20, 24, and 32 kHz, calibrated at 60 dB peak SPL. A recent study (Turner et al., 2006 ) suggested that while normal rats detect the silent gap and their startle reflex is inhibited robustly (A), rats with tinnitus have difficulty detecting the gap when the background sound is at or near the frequency of their putative tinnitus (B). Presumably, the internal tinnitus serves to partially fill the silent gap, making the gap less detectable, therefore less able to inhibit the startle reflex.
Date of download: 10/17/2017
Copyright © American Speech-Language-Hearing Association