William Yost

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In a reverberant environment, sounds reach the ears through several paths. Although the direct sound is followed by multiple reflections, which would be audible in isolation, the first-arriving wavefront dominates many aspects of perception. The "precedence effect" refers to a group of phenomena that are thought to be involved in resolving competition for(More)
  • William Yost
  • The Journal of the Acoustical Society of America
  • 1996
Iterated rippled noise (IRN) stimuli are generated by a cascade of delay (d), gain (g), and add networks. The matched pitch of IRN stimuli was determined as a function of the type of network used to generate IRN stimuli, the delay (d = 2, 4, and 8 ms), the number of iterations (n = 1,2,3,4,6,8) of the delay and add networks, and whether the delayed noise(More)
  • William Yost
  • The Journal of the Acoustical Society of America
  • 1996
Two versions of a cascade add, attenuate, and delay circuit were used to generate iterated rippled noise (IRN) stimuli. IRN stimuli produce a repetition pitch whose pitch strength relative to the noise percept can be varied by changing the type of circuit, the attenuation, or the number of iterations in the circuit. Listeners were asked to use pitch(More)
Two versions of a cascaded add, attenuate, and delay circuit were used to generate iterated rippled noise (IRN) stimuli. IRN stimuli produce a repetition pitch whose strength relative to the noise can be varied by changing the type of circuit, the attenuation, or the number of iterations in the circuit. Listeners were asked to discriminate between various(More)
The psychophysics and neurophysiology of repetition noise (RN) processing was studied in the goldfish. RN is the sum of a noise waveform with its delayed (by T s) repetition, which may be attenuated (by A dB), and inverted relative to the undelayed signal. Such a signal has a periodic spectrum with peaks separated by 1/T Hz, and a prominence in its(More)
Listeners identified spoken words, letters, and numbers and the spatial location of these utterances in three listening conditions as a function of the number of simultaneously presented utterances. The three listening conditions were a normal listening condition, in which the sounds were presented over seven possible loudspeakers to a listener seated in a(More)
A simultaneous masking procedure was used to derive four measures of frequency selectivity in the chinchilla. The first experiment measured critical masking ratios (CRs) at various signal frequencies. Estimates of the chinchillas' critical bandwidths derived from the CRs were much broader than comparable human estimates, indicating that the chinchilla may(More)
Thresholds for detecting sinusoidal amplitude modulation (AM) of a wideband noise carrier were measured as a function of the duration of the modulating signal. The carrier was either; (a) gated with a duration that exceeded the duration of modulation by the combined stimulus rise and fall times; (b) presented with a fixed duration that included a 500-ms(More)
Two experiments using two-tone sinusoidally amplitude-modulated stimuli were conducted to assess cross-channel effects in processing low-frequency amplitude modulation. In experiment I, listeners were asked to discriminate between two sets of two-tone amplitude-modulated complexes. In one set, the modulation phase of the lower frequency carrier tone was(More)