Volume 33 #2

Contents

1. Computation of eye optics of the cetacean’s eye
2. Neurophysiological mechanisms of two sequential orientations comparison in working memory
3. Contribution of the marginal peripheral retina to color constancy: Evidence obtained due to contact lens with implanted occluder
4. Contribution of the spectral and temporal mechanisms to analysis of complex sound signals
5. Role of the donor of NO molecules in regulation of primary sensory neuron responses
6. Identity documents forgery detection with mobile devices
7. Transient processes of visual evoked potentials in the tasks of human-computer interfaces
8. Algebraic reconstruction in case of limited GPU memory in the task of computed tomography
9. New criteria for neural network encoder learning in the string segmentation problem

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

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