Some Implications of Binaural Signal Selection for Hearing Aid Evaluation

1964 ◽  
Vol 7 (3) ◽  
pp. 279-289
Author(s):  
Allan J. Heffler ◽  
Martin C. Schultz
Keyword(s):  
Hearing Loss ◽  
Hearing Aids ◽  
Binaural Hearing ◽  
Normal Hearing ◽  
The Other ◽  
Auditory Training ◽  
Signal Selection ◽  
Long Duration ◽  
Selection For ◽  
Binaural Hearing Aids

Clinical techniques for evaluating binaural hearing aids have been inconclusive. This paper offers some explanations of shortcomings in present approaches, concentrating upon several characteristics to be included in an adequate clinical procedure. These are the presence of competing sound; S/N ratios permitting measurable increases in discrimination from advantageous listening conditions; elimination of localization and sidedness effects; and the requirement of long duration signals with credit for partial responses. The study was an approach on normal-hearing individuals under several S/N ratios, with occlusion of one ear as an experimental variable. Listening was accomplished under homophasic and antiphasic conditions for each combination of the other conditions. Results demonstrated significant differences among the listening conditions and the results have been rationalized in schema for testing binaural hearing aids under various hearing-loss circumstances. Applications to auditory training are discussed.

scholarly journals Rhythmic Training Improves Temporal Anticipation and Adaptation Abilities in Children With Hearing Loss During Verbal Interaction

2019 ◽  
Vol 62 (9) ◽  
pp. 3234-3247 ◽  
Author(s):  
Céline Hidalgo ◽  
Jacques Pesnot-Lerousseau ◽  
Patrick Marquis ◽  
Stéphane Roman ◽  
Daniele Schön
Keyword(s):  
Hearing Loss ◽  
Hearing Aids ◽  
Speech Rate ◽  
Normal Hearing ◽  
Event Related Potential ◽  
Auditory Training ◽  
Temporal Adaptation ◽  
Accurate Performance ◽  
Speech Interaction ◽  
Children With Hearing Loss

Purpose In this study, we investigate temporal adaptation capacities of children with normal hearing and children with cochlear implants and/or hearing aids during verbal exchange. We also address the question of the efficiency of a rhythmic training on temporal adaptation during speech interaction in children with hearing loss. Method We recorded electroencephalogram data in children while they named pictures delivered on a screen, in alternation with a virtual partner. We manipulated the virtual partner's speech rate (fast vs. slow) and the regularity of alternation (regular vs. irregular). The group of children with normal hearing was tested once, and the group of children with hearing loss was tested twice: once after 30 min of auditory training and once after 30 min of rhythmic training. Results Both groups of children adjusted their speech rate to that of the virtual partner and were sensitive to the regularity of alternation with a less accurate performance following irregular turns. Moreover, irregular turns elicited a negative event-related potential in both groups, showing a detection of temporal deviancy. Notably, the amplitude of this negative component positively correlated with accuracy in the alternation task. In children with hearing loss, the effect was more pronounced and long-lasting following rhythmic training compared with auditory training. Conclusion These results are discussed in terms of temporal adaptation abilities in speech interaction and suggest the use of rhythmic training to improve these skills of children with hearing loss.

scholarly journals Audiological Manifestations in Kabuki (Niikawa-Kuroki) Syndrome

2011 ◽  
Vol 26 (1) ◽  
pp. 21-26
Author(s):  
Celina Ann M. Tobias ◽  
Teresa Luisa Gloria-Cruz ◽  
Charlotte M. Chiong
Keyword(s):  
Hearing Loss ◽  
Hearing Aids ◽  
Binaural Hearing ◽  
University Hospital ◽  
Kabuki Syndrome ◽  
Ear Diseases ◽  
Rare Malformation ◽  
The Right ◽  
Speech And Language Development ◽  
Binaural Hearing Aids

Objective: To describe the audiological profile, clinical features and briefly summarize the speech and language development of a child with Kabuki syndrome (KS). KS is a rare malformation syndrome that usually presents with mental retardation and multiple congenital anomalies including ear diseases and hearing loss.   Methods: Design: Case report Setting: Tertiary Public University Hospital Subject: One patient   Results: A five-year-old female diagnosed with KS at age three presented with moderate to severe conductive hearing loss in the right ear with a drop at the high frequencies and moderate to severe conductive sloping hearing loss in the left ear. She also had fluctuating tympanometric findings. She was fit with binaural hearing aids.   Conclusion: Ear diseases and hearing loss should immediately be considered in patients diagnosed with KS. A comprehensive audiological and otolaryngological evaluation should also be performed when presented with a KS case.   Keywords: Kabuki syndrome, Niikawa-Kuroki syndrome, hearing loss, multiple anomalies

Assessment of expressive vocabulary outcomes in hearing-impaired children with hearing aids: do bilaterally hearing-impaired children catch up?

2006 ◽  
Vol 120 (8) ◽  
pp. 619-626 ◽  
Author(s):  
C Kiese-Himmel ◽  
M Reeh
Keyword(s):  
Hearing Loss ◽  
Hearing Aids ◽  
Repeated Measures ◽  
Binaural Hearing ◽  
Normal Hearing ◽  
Hearing Impaired ◽  
Expressive Vocabulary ◽  
Clinical Tool ◽  
Impaired Children ◽  
Hearing Impaired Children

Objective: To evaluate expressive vocabulary growth in hearing-impaired preschool children wearing hearing aids.Design: Prospective analysis of the outcomes of children included in the 1994 German ‘Goettinger Hoer-Sprachregister’ (GHR) series, using a repeated-measures paradigm in six- to nine-month intervals (t1–t3).Subjects: Twenty-seven children (aged 2.0–4.4 years) with bilateral sensorineural hearing loss (with averages at frequencies of 0.5, 1, 2 and 4 kHz of >20 to >90 dB in the better ear) from the 1994 GHR series. The children were diagnosed at a mean age of 31.4 months (standard deviation (SD) 10.6 months) and fitted with a binaural hearing aid at a mean age of 32.3 months (SD 10.5 months). Nonverbal intelligence was average (five missing data entries). Standardized, age-appropriate picture naming tests (the ‘Sprachentwicklungstest für 2-jährige Kinder’, the Kaufman Assessment Battery for Children subtest vocabulary, and the ‘Aktiver Wortschatztest für drei- bis sechsjährige Kinder’) were carried out at three time points and results compared with data from children with normal hearing. The test raw scores were converted to T scores (mean = 50; SD = 10).Results: On average, the children scored far below the normative population at t1 (mean = 28.9; SD = 11.3) and slowly improved as they got older (at t3, mean = 34.1; SD = 16.1; p = 0.010). Children with mild or moderate hearing loss improved most notably (mean difference t1–t3; p = 0.001), except for one child of deaf parents. Two of the five mildly hearing-impaired children and two of the eleven moderately hearing-impaired children caught up with their normal hearing peers with regards to expressive vocabulary. Such expressive vocabulary achievements were not seen in any children with >70 dB hearing loss or in six of the eleven children (55 per cent) with a 40–70 dB hearing loss, despite receiving adequate personal amplification.Conclusion: Testing expressive vocabulary size is a useful clinical tool in assessing linguistic lexical outcome.

scholarly journals Sound Localization and Lateralization by Bilateral Bone Conduction Devices, Middle Ear Implants, and Cartilage Conduction Hearing Aids

2021 ◽  
Vol 11 (4) ◽  
pp. 508-523
Author(s):  
Kimio Shiraishi
Keyword(s):  
Hearing Loss ◽  
Middle Ear ◽  
Sound Localization ◽  
Hearing Aids ◽  
Bone Conduction ◽  
Binaural Hearing ◽  
Normal Hearing ◽  
Aural Atresia ◽  
Middle Ear Implants ◽  
And Cartilage

Sound localization in daily life is one of the important functions of binaural hearing. Bilateral bone conduction devices (BCDs), middle ear implants, and cartilage conduction hearing aids have been often applied for patients with conductive hearing loss (CHL) or mixed hearing loss, for example, resulting from bilateral microtia and aural atresia. In this review, factors affecting the accuracy of sound localization with bilateral BCDs, middle ear implants, and cartilage conduction hearing aids were classified into four categories: (1) types of device, (2) experimental conditions, (3) participants, and (4) pathways from the stimulus sound to both cochleae. Recent studies within the past 10 years on sound localization and lateralization by BCDs, middle ear implants, and cartilage conduction hearing aids were discussed. Most studies showed benefits for sound localization or lateralization with bilateral devices. However, the judgment accuracy was generally lower than that for normal hearing, and the localization errors tended to be larger than for normal hearing. Moreover, it should be noted that the degree of accuracy in sound localization by bilateral BCDs varied considerably among patients. Further research on sound localization is necessary to analyze the complicated mechanism of bone conduction, including suprathreshold air conduction with bilateral devices.

A Questionnaire Survey of Current Rehabilitation Practices for Adults With Normal Hearing Sensitivity Who Experience Auditory Difficulties

2020 ◽  
Vol 29 (4) ◽  
pp. 738-761
Author(s):  
Tess K. Koerner ◽  
Melissa A. Papesh ◽  
Frederick J. Gallun
Keyword(s):  
Hearing Aids ◽  
Questionnaire Survey ◽  
Patient Population ◽  
Clinical Care ◽  
Normal Hearing ◽  
Auditory Training ◽  
Training Methods ◽  
Hearing Sensitivity ◽  
Considerable Benefit ◽  
High Level

Purpose A questionnaire survey was conducted to collect information from clinical audiologists about rehabilitation options for adult patients who report significant auditory difficulties despite having normal or near-normal hearing sensitivity. This work aimed to provide more information about what audiologists are currently doing in the clinic to manage auditory difficulties in this patient population and their views on the efficacy of recommended rehabilitation methods. Method A questionnaire survey containing multiple-choice and open-ended questions was developed and disseminated online. Invitations to participate were delivered via e-mail listservs and through business cards provided at annual audiology conferences. All responses were anonymous at the time of data collection. Results Responses were collected from 209 participants. The majority of participants reported seeing at least one normal-hearing patient per month who reported significant communication difficulties. However, few respondents indicated that their location had specific protocols for the treatment of these patients. Counseling was reported as the most frequent rehabilitation method, but results revealed that audiologists across various work settings are also successfully starting to fit patients with mild-gain hearing aids. Responses indicated that patient compliance with computer-based auditory training methods was regarded as low, with patients generally preferring device-based rehabilitation options. Conclusions Results from this questionnaire survey strongly suggest that audiologists frequently see normal-hearing patients who report auditory difficulties, but that few clinicians are equipped with established protocols for diagnosis and management. While many feel that mild-gain hearing aids provide considerable benefit for these patients, very little research has been conducted to date to support the use of hearing aids or other rehabilitation options for this unique patient population. This study reveals the critical need for additional research to establish evidence-based practice guidelines that will empower clinicians to provide a high level of clinical care and effective rehabilitation strategies to these patients.

Measurements of Loudness Growth in 1/2-Octave Bands for Children and Adults With Normal Hearing

1999 ◽  
Vol 8 (1) ◽  
pp. 40-46 ◽  
Author(s):  
Melisa R. Ellis ◽  
Michael K. Wynne
Keyword(s):  
Hearing Loss ◽  
Hearing Aids ◽  
Hearing Aid ◽  
Age Groups ◽  
Lower Boundary ◽  
Normal Hearing ◽  
Boundary Values ◽  
Simple Modification ◽  
Point Data ◽  
Loudness Growth

The loudness growth in 1/2-octave bands (LGOB) procedure has been shown previously to provide valid estimates of loudness growth for adults with normal hearing and those with hearing loss (Allen, Hall, & Jeng, 1990), and it has been widely incorporated into fitting strategies for adult hearing aid users by a hearing aid manufacturer. Here, we applied a simple modification of LGOB to children and adults with normal hearing and then compared the loudness growth functions (as obtained from end-point data) between the two age groups. In addition, reliability data obtained within a single session and between test sessions were compared between the two groups. Large differences were observed in the means between the two groups for the lower boundary values, the upper boundary values, and the range between boundaries both within and across all frequencies. The data obtained from children also had greater variance than the adult data. In addition, there was more variability in the data across test sessions for children. Many test-retest differences for children exceeded 10 dB. Adult test-retest differences were generally less than 10 dB. Although the LGOB with the modifications used in this study may be used to measure loudness growth in children, its poor reliability with this age group may limit its clinical use for children with hearing loss. Additional work is needed to explore whether loudness growth measures can be adapted successfully to children and whether these measures contribute worthwhile information for fitting hearing aids to children.

scholarly journals Perception of Auditory Distance in Normal-Hearing and Moderate-to-Profound Hearing-Impaired Listeners

2019 ◽  
Vol 23 ◽  
pp. 233121651988761 ◽  
Author(s):  
Gilles Courtois ◽  
Vincent Grimaldi ◽  
Hervé Lissek ◽  
Philippe Estoppey ◽  
Eleftheria Georganti
Keyword(s):  
Hearing Loss ◽  
Hearing Aids ◽  
Normal Hearing ◽  
Hearing Impaired ◽  
Spatial Cues ◽  
Linear Amplification ◽  
Profound Hearing Loss ◽  
Wireless Microphone ◽  
Auditory Distance ◽  
Non Linear

The auditory system allows the estimation of the distance to sound-emitting objects using multiple spatial cues. In virtual acoustics over headphones, a prerequisite to render auditory distance impression is sound externalization, which denotes the perception of synthesized stimuli outside of the head. Prior studies have found that listeners with mild-to-moderate hearing loss are able to perceive auditory distance and are sensitive to externalization. However, this ability may be degraded by certain factors, such as non-linear amplification in hearing aids or the use of a remote wireless microphone. In this study, 10 normal-hearing and 20 moderate-to-profound hearing-impaired listeners were instructed to estimate the distance of stimuli processed with different methods yielding various perceived auditory distances in the vicinity of the listeners. Two different configurations of non-linear amplification were implemented, and a novel feature aiming to restore a sense of distance in wireless microphone systems was tested. The results showed that the hearing-impaired listeners, even those with a profound hearing loss, were able to discriminate nearby and far sounds that were equalized in level. Their perception of auditory distance was however more contracted than in normal-hearing listeners. Non-linear amplification was found to distort the original spatial cues, but no adverse effect on the ratings of auditory distance was evident. Finally, it was shown that the novel feature was successful in allowing the hearing-impaired participants to perceive externalized sounds with wireless microphone systems.

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