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Detectability of auditory signals presented without defined observation intervalsAbility to detect tones in noise was measured without defined observation intervals. Latency density functions were estimated for the first response following a signal and, separately, for the first response following randomly distributed instances of background noise. Detection performance was measured by the maximum separation between the cumulative latency density functions for signal-plus-noise and for noise alone. Values of the index of detectability, estimated by this procedure, were approximately those obtained with a 2-dB weaker signal and defined observation intervals. Simulation of defined- and non-defined-interval tasks with an energy detector showed that this device performs very similarly to the human listener in both cases.
Document ID
19760087380
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Watson, C. S.
(Central Institute for the Deaf; Washington University St. Louis, Mo., United States)
Nichols, T. L.
(U.S. Army, Food Sciences Laboratory, Natick Mass., United States)
Date Acquired
August 8, 2013
Publication Date
March 1, 1976
Publication Information
Publication: Acoustical Society of America
Subject Category
Behavioral Sciences
Accession Number
76A26750
Funding Number(s)
CONTRACT_GRANT: NIH-NS-03856
Distribution Limits
Public
Copyright
Other

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