Binaural beats are a phenomenon that occurs during dichotic stimulation due to binaural integration. It takes the form
of cyclic movement of the sound image in the listener’s acoustic space when the beat frequency range is below 3 Hz. Our
subjects used the inserted earphones to listen to the stimuli that created a sense of sound movement due to changes in
the interaural time difference (ITD). We used three types of dichotic stimuli which simulated smooth azimuthal cyclic
movement and cyclic abrupt shifts. The ITD changes determined central or lateral positions of movement trajectories. The
results confirm that both types of movement created the effect of binaural beats. The range of beats depended on the
spatial position of the trajectory: in the frontal sector of acoustic space, the range of beats was greater than on the
left or right. The perceived trajectories of smooth motion were shorter than the trajectories of abrupt shift. The
influence of spatial position on the perceived trajectory length is interpreted from the standpoint of nonlinear
features of lateralization. It is suggested that the effect of ITD pattern on the perceived trajectory length is
mediated by temporal integration mechanisms of binaural hearing.
Key words:
binaural beat, spatial hearing, binaural integration, interaural time difference
DOI: 10.31857/S0235009224030033
EDN: BSBTFP
Cite:
Shestopalova L. B., Petropavlovskaia E. A., Salikova D. A., Letyagin P. I.
Ovosprinimaemye traektorii tsiklicheskogo dvizheniya zvukovykh obrazov
[Perceived trajectories of cyclic sound movement].
Sensornye sistemy [Sensory systems].
2024.
V. 38(3).
P. 51–62 (in Russian). doi: 10.31857/S0235009224030033
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