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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.

2

British sign language recognition in the wild based on multi-class SVM

Olszewska Joanna I., Quinn M.

Annals of Computer Science and Information Systems

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2019

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Vol. 18

81--86

EN

Developing assistive, cost-effective, non-invasive technologies to aid communication of people with hearing impairments is of prime importance in our society, in order to widen accessibility and inclusiveness. For this purpose, we have developed an intelligent vision system embedded on a smartphone and deployed in the wild. In particular, it integrates both computer vision methods involving Histogram of Oriented Gradients (HOG) and machine learning techniques such as multiclass Support Vector Machine (SVM) to detect and recognize British Visual Language (BSL) signs automatically. Our system was successfully tested on a real-world dataset containing 13,066 samples and shown an accuracy of over 99% with an average processing time of 170ms, thus appropriate for real-time visual signing.

3

Non-visual perception of landscape – use of hearing and other senses in the perception of selected spaces in the city of Poznań

Szczepańska Magdalena, Wilkaniec Agnieszka, Łabędzka Daria, Micińska Joanna

Teka Komisji Architektury, Urbanistyki i Studiów Krajobrazowych

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2013

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T. 9, nr 2

68--79

EN

Perception of landscape is associated with the perception of space first of all by the sense of sight. Visual perception is supplemented by sensations collected by the other senses. The aim of the conducted investigations was to identify landscapes in the city of Poznań perceived both positively and negatively, using the senses of hearing, smell and touch. The questionnaire method was applied in this study. It was determined that for most respondents a decisive role in the per-ception of landscape, apart from sight, was played by the sense of smell and hearing.

PL

Postrzeganie krajobrazu związane jest przede wszystkim z percepcją przestrzeni zmysłem wzroku. Percepcja wizualna wspomagana jest poprzez inne zmysły. Celem badań była identyfikacja krajobrazu miasta Poznań, postrzeganego zarówno pozytywnie, jak i negatywnie przy użyciu słuchu, węchu i dotyku. W tym celu przygotowano kwestionariusz. Dla największej liczby respondentów decydującą rolę w percepcji krajobrazu, oprócz wzroku, stanowił zmysł słuchu i węchu.

4

Obiektywna ocena traktu słuchowego oparta na analizie falkowej potencjałów wywołanych i sieci wektorów nośnych

Suchocki M., Dobrowolski A.P.

Przegląd Elektrotechniczny

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2013

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R. 89, nr 9

160-165

PL

W artykule opisano problematykę związaną z elektroencefalograficznym badaniem słuchu. Ze względu na to, że obecne metody opierają się głównie na interpretacji przebiegów czasowych elektroencefalogramów i wymagają od badającego neurologa dużego doświadczenia, podjęto się zadania, które ma na celu eliminację subiektywnej oceny wyników oraz zautomatyzowanie badania. Autorzy korzystając z metod CPS wyodrębnili cechy dystynktywne potencjałów wywołanych dobrze różnicujące przypadki prawidłowe od patologicznych.

EN

The paper describes the problems associated with electroencephalographic examination hearing. Due to the fact that the current methods are mainly based on the interpretation of the timing electroencephalograms and require a large experience of examining neurologist, it was a task that aims to eliminate the subjective evaluation of results, and test automation. The authors use the CPS methods have identified distinctive features of evoked potentials well differentiating normal form pathological cases.

5

Noise-Induced Hearing Loss in Professional Orchestral Musicians

Pawlaczyk-Łuszczyńska M., Zamojska M., Dudarewicz A., Zaborowski K.

Archives of Acoustics

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2013

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Vol. 38, No. 2

223--234

EN

The overall purpose of this study was to assess hearing status in professional orchestral musicians. Standard pure-tone audiometry (PTA) and transient-evoked otoacoustic emissions (TEOAEs) were per- formed in 126 orchestral musicians. Occupational and non-occupational risk factors for noise-induced hearing loss (NIHL) were identified in questionnaire inquiry. Data on sound pressure levels produced by various groups of instruments were also collected and analyzed. Measured hearing threshold levels (HTLs) were compared with the theoretical predictions calculated according to ISO 1999 (1990). Musicians were exposed to excessive sound at weekly noise exposure levels of for 81-100 dB (mean: 86.6±4.0 dB) for 5-48 years (mean: 24.0±10.7 years). Most of them (95%) had hearing corresponds to grade 0 of hearing impairment (mean hearing threshold level at 500, 1000, 2000 and 4000 Hz lower than 25 dB). However, high frequency notched audiograms typical for noise-induced hearing loss were found in 35% of cases. Simultaneously, about 35% of audiograms showed typical for NIHL high frequency notches (mainly occurring at 6000 Hz). When analyzing the impact of age, gender and noise exposure on hearing test results both PTA and TEOAE consistently showed better hearing in females vs. males, younger vs. older musicians. But higher exposure to orchestral noise was not associated with poorer hearing tests results. The musician’s audiometric hearing threshold levels were poorer than equivalent non-noise-exposed population and better (at 3000 and 4000 Hz) than expected for noise-exposed population according to ISO 1999 (1990). Thus, music impairs hearing of orchestral musicians, but less than expected from noise exposure.

6

Model sterowania w przemysłowym systemie aktywnej redukcji hałasu

Pawełczyk M., Latos M., Bartoszek S.

Modelowanie Inżynierskie

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2012

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T. 13, nr 44

229-236

PL

Przedstawiono praktyczne sposoby ochrony narządu słuchu pracowników na stanowiskach pracy poprzez zastosowanie rozwiązań personalnych i globalnych. Prezentując rozwiązanie personalne, bazujące na zastosowaniu aktywnej wkładki dousznej, pokazano proces projektowania układu sterowania w strukturze kompensacji o stałych parametrach, jak również wyniki badań eksperymentalnych . Omówiono rozwój metod ochrony przed hałasem rozwijanych w ITG KOMAG poprzez propozycje rozwiązań globalnych na wybranych stanowiskach pracy.

EN

Technical approaches to hearing protection in the workplace using personal and global solutions have been discussed. In the personal solution, based on active earplugs, the process of designing a feedforward, fixed parameter control system, as well as real-world experimental results have been presented. Active noise reduction methods under development by ITG KOMAG have been considered as a part of proposing global solutions in the selected workplaces.

7

Aparaty słuchowe a implanty słuchu. Stan obecny i perspektywy rozwoju

Pietralik I., Łagan S.

Aktualne Problemy Biomechaniki

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2011

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z. 5

127--132

PL

Słuch jest zmysłem pozwalającym na odbieranie fal dźwiękowych. Narządem słuchowym są uszy. Coraz częściej człowiek spotyka się z ubytkiem słuchu. Historia zastosowania pierwszych urządzeń wspomagających słyszenie sięga aż starożytności. Zaczęto używać metalowe tuby. Wynalezienie mikrofonu, wzmacniaczy i tranzystorów spowodowało szybki postęp w rozwoju i miniaturyzacji aparatów słuchowych. Dzisiejsze aparaty słuchowe są dostosowywane do każdego pacjenta indywidualnie. Możemy wyróżnić aparaty słuchowe zauszne typu BTE i typu RITE, a także aparaty wewnątrzuszne ITE i wewnątrzkanałowe CIC.

EN

This paper presents a literature review based on the generation of hearing aids, with particular emphasis on the anatomical structures of the ear and hearing loss affecting the structure and type of prostheses. An important aspect is the analysis of future solutions, taking into account the advantages and disadvantages of current hearing aids and their uses.

8

Development of cartilage conduction hearing aid

Hosoi Y., Yanai S., Nishimura T., Sakaguchi T., Iwakura T., Yoshino K.

Archives of Materials Science and Engineering

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2010

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Vol. 42, nr 2

104-110

EN

Purpose: The potential demand for hearing aids is increasing in accordance with aging of populations in many developed countries. Because certain patients cannot use air conduction hearing aids, they usually use bone conduction hearing aids. However, bone does not transmit sound as efficiently as air, and bone conduction hearing aids require surgery (bone anchored hearing aid) or great pressure to the skull. The first purpose of this study is to examine the efficacy of a new sound conduction pathway via the cartilage. The second purpose is to develop a hearing aid with a cartilage conduction transducer for patients who cannot use regular air conduction hearing aids. Design/methodology/approach: We examined the hearing ability of a patient with atresia of both external auditory meatuses via three kinds of conduction pathways (air, bone, and cartilage). After the best position for the cartilage conduction transducer was found, audiometric evaluation was performed for his left ear with an insertion earphone (air conduction), a bone conduction transducer, and a cartilage conduction transducer. Then we made a new hearing aid using cartilage conduction and got subjective data from the patients. Findings: The tragal cartilage was the best position for the cartilage conduction transducer. The patient’s mean hearing levels were 58.3 dBHL, 6.7 dBHL, and 3.3 dBHL for air conduction, bone conduction, and cartilage conduction respectively. The hearing ability of the patients obtained from the cartilage conduction hearing aid was comparable to those from the bone conduction hearing aid. Practical implications: Hearing levels using cartilage conduction are very similar to those via bone conduction. Cartilage conduction hearing aids may overcome the practical disadvantages of bone conduction hearing aids such as pain and the need for surgery. Originality/value: We have clarified the efficacy of the cartilage conduction pathway and developed a prototype ‘cartilage conduction hearing aid’, which is the first hearing aid to use sound transmission via cartilage.

9

Evaluation of the Increased Accident Risk From Workplace Noise

Toppila E., Pyykko I., Paakkonen R.

International Journal of Occupational Safety and Ergonomics

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2009

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Vol. 15, No. 2

155--162

EN

Directive 2003/10/EC sets the requirement for evaluating the effect of noise on accident risk. Accident risk is elevated for workers with a hearing handicap because of their reduced speech intelligibility and reduced capability to perceive the direction of incoming sound. An audiogram is not a good method for the evaluation of these functions. To reduce accident risk, organisational and personal solutions are needed. For both methods, efficiency must be evaluated through proper risk assessment. Because practical guidelines are not available, this paper presents principles for accident risk evaluation techniques.

10

Central Auditory Damage Induced by Solvent Exposure

Fuente A., McPherson B.

International Journal of Occupational Safety and Ergonomics

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2007

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Vol. 13, No. 4

391--397

EN

Different studies have demonstrated that solvents may induce auditory damage. It has been suggested that part of this damage may be localised in central auditory pathways. The present study aimed to investigate possible auditory processing disorders related to solvent exposure. Thirty solvent-exposed workers and 30 gender-, age- and educational level-matched control subjects were selected to participate in the study. To select participants, a questionnaire, otoscopy, pure-tone audiometry and tympanometry were carried out. Filtered speech (FS), random gap detection (RGD) and hearing-in-noise tests (HINT) were conducted in the selected participants. Both groups of workers presented as a mean normal hearing thresholds. However, significant differences between groups were observed for RGD, FS and HINT. It is concluded that a possible auditory processing disorder may be related to solvent exposure.