Binaural perception of the modulation depth of AM signals

Ozimek, Edward; Konieczny, Jerzy; Sone, Toshio

doi:10.1016/j.heares.2007.10.008

Cited by 5 publications

(5 citation statements)

References 38 publications

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“…4, 5) than binaural stimulation. This is consistent with previous EEG work 17,22 , and also the finding that perceived loudness and modulation depth are higher for binaural than monaural presentation [11][12][13][14]28 . However, these auditory effects are dramatically different from the visual domain, where both discrimination performance and perceived contrast are largely independent of the number of eyes stimulated 34 .…”

Section: Discussionsupporting

confidence: 93%

“…A more straightforward approach than the model we test above is to sum amplitude modulation signals linearly across the ears. This approach has been successful in previous studies on the perception of amplitude-modulated tones 28 , and has some plausibility given the high levels of binaural summation found at threshold in our psychophysical results (a summation ratio of 1.67). We attempted to fit a model incorporating linear summation, followed by a (binaural) nonlinear transducer as follows:…”

Section: The Model Shares Features With Previous Binaural Models Presupporting

confidence: 64%

“…The perception of amplitude-modulated stimuli shows similar properties to the perception of pure-tones in terms of binaural processing. For example, binaural sensitivity to amplitude modulation (AM) is better than monaural sensitivity 26,27 , and the perceived modulation depth is approximately the average of the two monaural modulation depths over a wide range 28 . Presenting two different modulation frequencies to the left and right ears can produce the percept of a 'binaural beat' pattern at the difference intermodulation frequency (the highest minus the lowest frequency), suggesting that the two modulation frequencies are combined centrally 29 .…”

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confidence: 99%

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Binaural summation of amplitude modulation involves weak interaural suppression

Baker

Vilidaitė

McClarnon

et al. 2020

Sci Rep

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The brain combines sounds from the two ears, but what is the algorithm used to achieve this summation of signals? Here we combine psychophysical amplitude modulation discrimination and steady-state electroencephalography (EEG) data to investigate the architecture of binaural combination for amplitude-modulated tones. Discrimination thresholds followed a 'dipper' shaped function of pedestal modulation depth, and were consistently lower for binaural than monaural presentation of modulated tones. The EEG responses were greater for binaural than monaural presentation of modulated tones, and when a masker was presented to one ear, it produced only weak suppression of the response to a signal presented to the other ear. Both data sets were well-fit by a computational model originally derived for visual signal combination, but with suppression between the two channels (ears) being much weaker than in binocular vision. We suggest that the distinct ecological constraints on vision and hearing can explain this difference, if it is assumed that the brain avoids over-representing sensory signals originating from a single object. These findings position our understanding of binaural summation in a broader context of work on sensory signal combination in the brain, and delineate the similarities and differences between vision and hearing.

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Section: Discussionsupporting

confidence: 93%

Section: The Model Shares Features With Previous Binaural Models Presupporting

confidence: 64%

mentioning

confidence: 99%

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Binaural summation of amplitude modulation involves weak interaural suppression

Baker

Vilidaitė

McClarnon

et al. 2020

Sci Rep

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“…The binaural tones show how neuronal firing in the auditory nerve maintains the phase information of the received signal (Kasprzak, 2011;Ozimek et al, 2008). The route of the auditory nerve to the brain allows the exchange of information coming from both sides, before the sound reaches the cortex, ensuring conscious listening.…”

Section: Introductionmentioning

confidence: 99%

Effect of Binaural Stimulation on Attention and EEG

Crespo¹,

Recuero²,

Gálvez³

et al. 2013

Archives of Acoustics

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When two pure tones of slightly different frequency are presented separately to each ear, the listener perceives a third single tone with amplitude variations at a frequency that equals the difference between the two tones; this perceptual illusion is known as the binaural auditory beat (BB). There are anecdotal reports that suggest that the binaural beat can entrain EEG activity and may affect the arousal levels, although few studies have been published.There is a need for double-blind, well-designed studies in order to establish a solid foundation for these sounds, as most of the documented benefits come from self-reported cases that could be affected by placebo effect. As BBs are a cheap technology (it even exists a free open source programmable binauralbeat generator on the Internet named Gnaural), any achievement in this area could be of public interest. The aim in our research was to explore the potential of BBs in a particular field: tasks that require focus and concentration. In order to detect changes in the brain waves that could relate to any particular improvement, EEG recordings of a small sample of individuals were also obtained.In this study we compare the effect of different binaural stimulation in 7 EEG frequency ranges. 78 participants were exposed to 20-min binaural beat stimulation. The effects were obtained both qualitative with cognitive test and quantitative with EEG analysis. Results suggest no significant statistical improvement in 20-min stimulation.

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“…Los tonos binaurales surgen como el resultado de la superposición de las descargas neuronales en el nivel apropiado del canal auditivo, que se produce por la llegada de la información de ambos oídos. Los tonos binaurales muestran como las descargas neuronales en el nervio auditivo mantienen la información de la fase de las señales recibidas (Kasprzak, 2011;Ozimek et al, 2008). El camino del nervio auditivo hasta el cerebro permite el intercambio de información procedente de ambos oídos antes de llegar al córtex, asegurando una escucha consciente.…”

Section: Ondas Binauralesunclassified

Bases para un diseño metodológico de estimulación binaural como terapia acústica en neurología

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Binaural perception of the modulation depth of AM signals

Cited by 5 publications

References 38 publications

Binaural summation of amplitude modulation involves weak interaural suppression

Binaural summation of amplitude modulation involves weak interaural suppression

Effect of Binaural Stimulation on Attention and EEG

Bases para un diseño metodológico de estimulación binaural como terapia acústica en neurología

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