Showing papers by "Murray B. Sachs published in 1986"

Some Aspects of Rate Coding in the Auditory Nerve

Abstract: A number of schemes for the encoding of complex stimuli in populations of auditory-nerve fibers have been studied in the past decade. These schemes differ in their assumptions about which aspects of auditory nerve fiber spike trains encode signal strength. Rate-place codes represent spectral features, such as the formants of speech, in terms of the distribution of average discharge rate across fiber best frequency (BF) (Kiang and Moxon, 1974; Sachs and Young, 1979; Delgutte and Kiang, 1984). Temporal-place codes make use of the fine temporal details (phase-locking) of the auditory-nerve spike patterns to represent stimulus features (Young and Sachs, 1979; Reale and Geisler, 1980; Delgutte and Kiang, 1984a).

Human tone detection in continous‐ and pulsed‐noise maskers

Abstract: A two‐interval, forced‐choice paradigm was used to measure the critical ratio of human subjects detecting a tone burst in continuous noise and noise gated simultaneously with the tone bursts. Noise spectrum levels of 35, 15, and − 5 dB SPL/Hz were used; tone frequencies were 500, 1000, 2000, 4000, and 8000 Hz. At 4000 and 8000 Hz, critical ratios were significantly larger for the simultaneously gated noise than for continuous noise. There were no significant differences between the critical ratios for continuous and gated noise at frequencies of 500, 1000, and 2000 Hz. These results are consistent with those of Wier et al. [J. Acoust. Soc. Am. 61, 1298–1300 (1977)] and extend those results to higher frequencies where differences between the continuous and simultaneously gated masking cases are greater.