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Discrimination of rippled sound signals with overlapping additional signals

© 2021 M. S. Tomozova, D. I. Nechaev, O. N. Milekhina, A. Ya. Supin

Institute of Ecology and Evolution RAS 119071 Moscow, Leninsky Prospect, 33, Russia

Received 29 Mar 2021

Discrimination between test and reference rippled sound signals with overlapping additional signals was measured. In the test signal, ripple phase inversed every 400 ms. The reference signal had either a rippled spectrum with the same ripple density as the test or a spectrum with unresolvable ripple pattern. The additional signal had the same spectrum band as the test and reference signals, either flat or rippled 2 to 7 ripples/oct. With a rippled reference signal, the ripple- density resolution was 8.7 ripples/oct in control (no additional signal), 8.5 ripples/oct with a flat additional signal, and 8.6 to 9.2 ripples/oct with a rippled additional signal) of 2 to 7 ripples/oct (all insignificantly differing from control). With a noinrippled reference signal, the ripple density resolution was 51.0 ripple/oct in control, 16.7 ripples/oct with a flat additional signal, and 11.0 to 11.1 ripples/oct with a rippled additional signal 2 to 7 ripples/oct (all significantly differing from control). The conclusion: overlapping additional signals result in specific effects depending on the spectrum pattern of the additional signal, with these effects differing for spectral and temporal mechanisms of frequency analysis.

Key words: hearing, rippled spectra, frequency analysis

DOI: 10.31857/S0235009221030057

Cite: Tomozova M. S., Nechaev D. I., Milekhina O. N., Supin A. Ya. Razlichenie zvukovykh signalov s grebenchatymi spektrami v prisutstvii dopolnitelnykh signalov [Discrimination of rippled sound signals with overlapping additional signals]. Sensornye sistemy [Sensory systems]. 2021. V. 35(3). P. 228–235 (in Russian). doi: 10.31857/S0235009221030057

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