The development of auditory functions

Jutras, Benoît; Lagacé, Josée; Koravand, Amineh

doi:10.1016/b978-0-444-64150-2.00014-9

Cited by 5 publications

(2 citation statements)

References 106 publications

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“…The outer hair cells are connected to the normal functioning of the cochlear amplifier, and OAEs are by-products of those mechanisms. They can change depending on the type of stimulus and the sex of the person [ 12 ]. Abnormal OAEs can be a sign of hearing loss due to damaged structures in the inner ear or various pathologies of the middle ear, such as perforation of the eardrum, otitis media, and the presence of impacted cerumen [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Wideband Tympanometry and Pressurized Otoacoustic Emissions in Children with Surgical Excision of Palatine and/or Pharyngeal Tonsils

Sanches,

Sanfins,

Skarzynski

et al. 2024

Brain Sciences

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Palatine and pharyngeal tonsil hypertrophy may lead to dysfunction of the auditory tube due to a propensity for infection, potentially giving rise to otitis media. This is a quantitative and longitudinal study, developed from 2019 to 2021, at the State University of Campinas (UNICAMP). The studied sample comprised 15 participants aged 5 to 12 years (mean 7.9 years), 12 male and 3 female, arranged into two groups: children diagnosed with pharyngeal and/or palatine tonsil hypertrophy who were candidates for surgery (G1), and children who were later evaluated after surgery (G2). As part of the test, an otoscopy and measurements of logoaudiometry, pure-tone threshold audiometry, wideband tympanometry (ambient and peak pressure), and otoacoustic emissions (TEOAEs and DPOAEs, both at ambient and peak pressure) were all performed. There were statistically significant differences between phases in pure-tone audiometry, in terms of 226 Hz tympanometry, wideband tympanometry in peak pressure conditions, in the amplitude measurement TEOAEs in both pressure conditions, in DPOAEs in ambient pressure conditions, and in the signal/noise measurement in both pressures in DPOAEs. Overall, it was found that hearing tests were different for subjects with palatine and pharyngeal tonsil hypertrophy compared to the post-surgical group.

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Section: Introductionmentioning

confidence: 99%

Wideband Tympanometry and Pressurized Otoacoustic Emissions in Children with Surgical Excision of Palatine and/or Pharyngeal Tonsils

Sanches,

Sanfins,

Skarzynski

et al. 2024

Brain Sciences

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“…Many experiments have been conducted to study the influence of the direction information of speech and white noise (especially at frequencies below 1 kHz) on speech intelligibility [ 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 ]. Briefly, the impact of the source direction on the perception of speech in the human binaural auditory system can be classified into two scenarios: in phase and out of phase; while the perception of noise can be divided into three scenarios: in phase, random phase, and out of phase, where in phase means that in every frequency the binaural (two-channel) signals have the same phase and out of phase means that in every frequency the phase difference between the binaural signals is exactly

.…”

Section: Introductionmentioning

confidence: 99%

Binaural Heterophasic Superdirective Beamforming

Wang

Chen

Benesty

et al. 2020

Sensors

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The superdirective beamformer, while attractive for processing broadband acoustic signals, often suffers from the problem of white noise amplification. So, its application requires well-designed acoustic arrays with sensors of extremely low self-noise level, which is difficult if not impossible to attain. In this paper, a new binaural superdirective beamformer is proposed, which is divided into two sub-beamformers. Based on studies and facts in psychoacoustics, these two filters are designed in such a way that they are orthogonal to each other to make the white noise components in the binaural beamforming outputs incoherent while maximizing the output interaural coherence of the diffuse noise, which is important for the brain to localize the sound source of interest. As a result, the signal of interest in the binaural superdirective beamformer’s outputs is in phase but the white noise components in the outputs are random phase, so the human auditory system can better separate the acoustic signal of interest from white noise by listening to the outputs of the proposed approach. Experimental results show that the derived binaural superdirective beamformer is superior to its conventional monaural counterpart.

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