Abstract：
:We report the results of behavioral studies in cats conducted first, to demonstrate the presence of a monaural mechanism for the enhancement of signal to noise; and then to examine the necessity or sufficiency of the acoustic striae for this mechanism. The results show that cats do indeed have a monaural mechanism for enhancing the detection of tones in co-located background noise for noise levels at least as high as 60 dB SPL. The ablation-behavior results show that surgical section of the dorsal (DAS) and most of the intermediate (IAS) striae has no measurable effect on this mechanism. In sharp contrast, even partial section of the trapezoid body results in a profound and permanent deficit and this deficit is not accounted for by hearing loss alone. It is concluded that the ascending and descending fibers in the dorsal and intermediate acoustic striae are neither necessary nor sufficient for enhancing the detection of salient sounds in a noisy environment while the ascending or descending fibers in the ventral acoustic stria are sufficient and probably necessary.
journal_name
Hear Resjournal_title
Hearing researchauthors
Masterton RB,Granger EM,Glendenning KKdoi
10.1016/0378-5955(94)90237-2subject
Has Abstractpub_date
1994-03-01 00:00:00pages
209-22issue
2eissn
0378-5955issn
1878-5891pii
0378-5955(94)90237-2journal_volume
73pub_type
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