Frequency resolving power (FRP) of hearing was measured in normal-hearing listeners. FRP was specified as a maximal
resolvable ripple density (ripples/oct) in rippled spectra. The test signal featured periodical (every 400 ms) reversals
of the ripple phase. The measurements were carried out by comparison of a test and comparison signal. Either a rippled-
spectrum signal with a constant ripple phase (contrary to the test signal with phase reversals) or a flat (non-rippled)
spectrum signal were exploited as a reference signal. Each measurement trial included one test and two reference
signals, randomly ordered. The listener identified the test signal as differing from two others. With the use of a
rippled-spectrum test signal, FRP estimate was 8.9 ± 0.6 cycle/oct. With the use of a flat-spectrum reference signal,
FRP estimate was 26.1 ± 8.8 cycle/oct. Hypothetically, this difference arose due to different contributions of the
spectral and temporal mechanisms of frequency selectivity. The spectral mechanism played a primary role for
discrimination of two rippledspectrum signals, whereas the temporal mechanism primarily contributed to discrimination
between the rippled- and flat-spectrum signals.
Key words:
hearing, rippled spectrum, frequency resolving power
DOI: 10.1134/S0235009219020057
Cite:
Milekhina O. N., Nechaev D. N., Supin A. Ya.
Uchastie spektralnogo i vremennogo mekhanizmov v analize slozhnykh zvukovykh signalov
[Contribution of the spectral and temporal mechanisms to analysis of complex sound signals].
Sensornye sistemy [Sensory systems].
2019.
V. 33(2).
P. 124-134 (in Russian). doi: 10.1134/S0235009219020057
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