In:
The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 97, No. 5_Supplement ( 1995-05-01), p. 3329-3329
Abstract:
Temporal gap detection (TGD) thresholds were measured between sinusoids that varied in frequency from 2000 to 3100 Hz for combinations of 2, 3, or 4 markers (e.g., combinations of one or two pre-gap markers with one or two post-gap markers). Sinusoidal frequencies F1 and F4 were used as pre-gap markers, while F2 and F3 served as post-gap markers. TGD thresholds were measured from three normal-hearing adults who tracked 70.7% correct detection thresholds adaptively across blocks of 50 2AFC trials. For symmetric marker conditions, where a pair or pairs of pre- and post-gap markers are equivalent in frequency on both sides of the silent gap (e.g., F1=F2 or F1=F2 and F3=F4), TGD thresholds are small (i.e., & lt;10 ms). However, for asymmetric marker conditions, where only three markers are presented on a trial (e.g., F1=F2, F2≠F3, no F4), performance is highly variable. TGD thresholds for asymmetric marker conditions may be very large (e.g., 20–80 ms), and tend to increase as the frequency separation is increased between markers F3 or F4 and markers F1=F2. These patterns of TGD results are inconsistent with a masking process and probably reflect mechanisms that are important in grouping of auditory images. [Research supported by NIH and The Center for Language and Present address: AT & T Bell Laboratories, 200 Laurel Ave., Middletown, NJ 07748.
Type of Medium:
Online Resource
ISSN:
0001-4966
,
1520-8524
Language:
English
Publisher:
Acoustical Society of America (ASA)
Publication Date:
1995
detail.hit.zdb_id:
1461063-2
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