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The Benefit of Binaural Hearing Among Listeners with Sensorineural Hearing Loss

Pastusiak Anna, Niemiec Dawid, Kociński Jędrzej, Warzybok Anna

Archives of Acoustics

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2019

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Vol. 44, No. 4

709--717

EN

The performance of binaural processing may be disturbed in the presence of hearing loss, especially of sensorineural type. To assess the impact of hearing loss on speech perception in noise regarding binaural processing, series of speech recognition measurements in controlled laboratory conditions were carried out. The spatial conditions were simulated using dummy head recordings played back on headphones. The Intelligibility Level Difference (ILD) was determined by measuring the change in the speech reception thresholds (SRT) between two configurations of a masking signal source (N) and a speech source (S), namely the S0N90 condition (where numbers stand for angles in horizontal plane) and the co-located condition (S0N0). To disentangle the head shadow effect (better ear effect) from binaural processing in the brain, the difference between binaural and monaural S0N90 condition (so-called Binaural Intelligibility Level Difference, BILD) value was calculated. Measurements were performed with a control group of normal-hearing listeners and a group of sensorineural hearing-impaired subjects. In all conditions performance of the hearing-impaired listeners was significantly lower than normal-hearing ones, resulting in higher SRT values (3 dB difference in the S0N0 configuration, 7.6 dB in S0N90 and 5 dB in monaural S0N90). The SRT improvement due to the spatial separation of target and masking signal (ILD) was also higher in the control group (8.1 dB) than in hearing-impaired listeners (3.5 dB). Moreover, a significant deterioration of the binaural processing described by BILD was found in people with sensorineural deficits. This parameter for normal-hearing listeners reached a value of 3 to 6 dB (4.6 dB on average) and decreased more than two times in the hearing-impaired group to 1.9 dB on average (with a deviation of 1.4 dB). These findings could not be explained by individual average hearing threshold (standard in audiological diagnostics) only. The outcomes indicate that there is a contribution of suprathershold deficits and it may be useful to consider binaural SRT measurements in noise in addition to the pure tone audiometry resulting in better diagnostics and hearing aid fitting.

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Zastosowania środków teleinformatycznych do diagnostyki zagrożeń hałasowych i chorób słuchu. Część I - Telemedyczne systemy do badania słuchu i szumów usznych

Czyżewski A., Kostek B.

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

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2004

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nr 4

173-180

PL

Opisano wdrożone systemy telemedyczne do masowych badań przesiewowych słuchu i szumów usznych. Wyniki badań, udokumentowane w rozproszonej bazie danych, porównywano z wynikami badań sprawdzających, prowadzonych przy użyciu profesjonalnej aparatury audiometrycznej. Materiał do tego typu porównań, który zgromadzono, jest wynikiem przeprowadzenia badań dużej liczebnie populacji dzieci szkolnych. Dzięki uruchomieniu systemu badań przesiewowych, możliwe stało się kierowanie do punktów specjalistycznej opieki medycznej osób mających różnego rodzaju problemy ze słuchem.

EN

The implemented systems for remote screening testing of hearing and diagnosing of tinnitus patients are described. The results of audiometric tests gathered in a distributed database were compared to those obtained with professional noise measuring devices. The material for comparison was collected as a result of testing large population of schoolchildren. Many thousands of people suffering from various kinds of hearing disorders were discovered and directed to medical care institutions owing to implemented telemedical applications.

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Noise-Induced Hearing Loss and Efficiency of Communication by Means of Speech

Rzymełka S.

Molecular and Quantum Acoustics

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2001

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Vol. 22

213-219

EN

The work presents studied on perception of speech, which is the essence of social efficiency of hearing, depending on degree of noise-induced hearing loss. The applied method consisted in processing verbal tests by a computer system that simulated noise-inducted hearing loss. A group of young people with normal hearing was used in the study and their intelliginility of speech was determined with apprpriately filtered verbal tests. It was found that hearing lodd characteristic of noise-inducted changes consideably impair understanding of speech.