scholarly journals Publisher Correction: Compression and amplification algorithms in hearing aids impair the selectivity of neural responses to speech

2022 ◽  
Author(s):  
Alex G. Armstrong ◽  
Chi Chung Lam ◽  
Shievanie Sabesan ◽  
Nicholas A. Lesica
Keyword(s):  
Hearing Aids ◽  
Neural Responses

scholarly journals Compression and amplification algorithms in hearing aids impair the selectivity of neural responses to speech

2021 ◽  
Author(s):  
Alex G. Armstrong ◽  
Chi Chung Lam ◽  
Shievanie Sabesan ◽  
Nicholas A. Lesica
Keyword(s):  
Hearing Aids ◽  
Neural Responses

scholarly journals The hearing aid dilemma: amplification, compression, and distortion of the neural code

2020 ◽  
Author(s):  
Alex Armstrong ◽  
Chi Chung Lam ◽  
Shievanie Sabesan ◽  
Nicholas A. Lesica
Keyword(s):  
Hearing Loss ◽  
Hearing Aids ◽  
Large Scale ◽  
Hearing Aid ◽  
Neural Code ◽  
Neural Responses ◽  
Processing Strategies ◽  
Sensitivity And Selectivity ◽  
Human Hearing ◽  
New Processing

AbstractHearing aids are the only available treatment for mild-to-moderate sensorineural hearing loss, but often fail to improve perception in difficult listening conditions. To identify the reasons for this failure, we studied the underlying neural code using large-scale single-neuron recordings in gerbils, a common animal model of human hearing. We found that a hearing aid restored the sensitivity of neural responses, but failed to restore their selectivity. The low selectivity of aided responses was not a direct effect of hearing loss per se, but rather a consequence of the strategies used by hearing aids to restore sensitivity: compression, which decreases the spectral and temporal contrast of incoming sounds, and amplification, which produces high intensities that distort the neural code even with normal hearing. To improve future hearing aids, new processing strategies that avoid this tradeoff between neural sensitivity and selectivity must be developed.

scholarly journals Neural Coding of Syllable-Final Fricatives with and without Hearing Aid Amplification

2020 ◽  
Vol 31 (08) ◽  
pp. 566-577
Author(s):  
Sharon E. Miller ◽  
Yang Zhang
Keyword(s):  
Hearing Aids ◽  
Repeated Measures ◽  
Neural Coding ◽  
Hearing Aid ◽  
Event Related Potentials ◽  
Neural Responses ◽  
Clinical Tool ◽  
Auditory Event ◽  
Related Potentials ◽  
Auditory Event Related Potentials

Abstract Background Cortical auditory event-related potentials are a potentially useful clinical tool to objectively assess speech outcomes with rehabilitative devices. Whether hearing aids reliably encode the spectrotemporal characteristics of fricative stimuli in different phonological contexts and whether these differences result in distinct neural responses with and without hearing aid amplification remain unclear. Purpose To determine whether the neural coding of the voiceless fricatives /s/ and /ʃ/ in the syllable-final context reliably differed without hearing aid amplification and whether hearing aid amplification altered neural coding of the fricative contrast. Research Design A repeated-measures, within subject design was used to compare the neural coding of a fricative contrast with and without hearing aid amplification. Study Sample Ten adult listeners with normal hearing participated in the study. Data Collection and Analysis Cortical auditory event-related potentials were elicited to an /ɑs/–/ɑʃ/ vowel-fricative contrast in unaided and aided listening conditions. Neural responses to the speech contrast were recorded at 64-electrode sites. Peak latencies and amplitudes of the cortical response waveforms to the fricatives were analyzed using repeated-measures analysis of variance. Results The P2' component of the acoustic change complex significantly differed from the syllable-final fricative contrast with and without hearing aid amplification. Hearing aid amplification differentially altered the neural coding of the contrast across frontal, temporal, and parietal electrode regions. Conclusions Hearing aid amplification altered the neural coding of syllable-final fricatives. However, the contrast remained acoustically distinct in the aided and unaided conditions, and cortical responses to the fricative significantly differed with and without the hearing aid.

scholarly journals Single-channel in-Ear-EEG detects the focus of auditory attention to concurrent tone streams and mixed speech

2016 ◽  
Author(s):  
Lorenz Fiedler ◽  
Malte Wöstmann ◽  
Carina Graversen ◽  
Alex Brandmeyer ◽  
Thomas Lunner ◽  
...  
Keyword(s):  
Hearing Aids ◽  
Short Distance ◽  
Single Channel ◽  
Hearing Aid ◽  
Attentional Focus ◽  
Auditory Attention ◽  
Neural Responses ◽  
Cocktail Party ◽  
Ear Canal ◽  
Scalp Eeg

AbstractObjectiveConventional, multi-channel scalp electroencephalography (EEG) allows the identification of the attended speaker in concurrent-listening (“cocktail party”) scenarios. This implies that EEG might provide valuable information to complement hearing aids with some form of EEG and to install a level of neuro-feedback.ApproachTo investigate whether a listener’s attentional focus can be detected from single-channel hearing-aid-compatible EEG configurations, we recorded EEG from three electrodes inside the ear canal (“in-Ear-EEG”) and additionally from 64 electrodes on the scalp. In two different, concurrent listening tasks, participants (n = 7) were fitted with individualized in-Ear-EEG pieces and were either asked to attend to one of two dichotically-presented, concurrent tone streams or to one of two diotically-presented, concurrent audiobooks. A forward encoding model was trained to predict the EEG response at single EEG channels.Main resultsEach individual participants’ attentional focus could be detected from single-channel EEG response recorded from short-distance configurations consisting only of a single in-Ear-EEG electrode and an adjacent scalp-EEG electrode. The differences in neural responses to attended and ignored stimuli were consistent in morphology (i.e., polarity and latency of components) across subjects.SignificanceIn sum, our findings show that the EEG response from a single-channel, hearing-aid-compatible configuration provides valuable information to identify a listener’s focus of attention.

Teachers' Stereotypes of Children Who Wear Hearing Aids

1981 ◽  
Vol 12 (3) ◽  
pp. 139-144 ◽  
Author(s):  
Cletus G. Fisher ◽  
Kenneth Brooks
Keyword(s):  
Elementary School ◽  
School Child ◽  
Hearing Aids ◽  
Hearing Aid ◽  
Social Implications ◽  
Elementary School Child ◽  
Classroom Teachers ◽  
Frequency Of Occurrence ◽  
Service Training

Classroom teachers were asked to list the traits they felt were characteristic of the elementary school child who wears a hearing aid. These listings were evaluated according to the desirability of the traits and were studied regarding frequency of occurrence, desirability, and educational, emotional, and social implications. The results of the groupings are discussed in terms of pre-service and in-service training.

The Hearing Aid Effect in African American and Caucasian Males as Perceived by Female Judges of the Same Race

1999 ◽  
Vol 30 (2) ◽  
pp. 165-172 ◽  
Author(s):  
Mary Davis ◽  
Rhonda Jackson ◽  
Tina Smith ◽  
William Cooper
Keyword(s):  
African American ◽  
Hearing Aids ◽  
Undergraduate Education ◽  
Hearing Aid ◽  
Semantic Differential ◽  
Semantic Differential Scale ◽  
Education Majors ◽  
Female Undergraduate ◽  
Lay Persons ◽  
Males And Females

Prior studies have proven the existence of the "hearing aid effect" when photographs of Caucasian males and females wearing a body aid, a post-auricular aid (behind-the-ear), or no hearing aid were judged by lay persons and professionals. This study was performed to determine if African American and Caucasian males, judged by female members of their own race, were likely to be judged in a similar manner on the basis of appearance, personality, assertiveness, and achievement. Sixty female undergraduate education majors (30 African American; 30 Caucasian) used a semantic differential scale to rate slides of preteen African American and Caucasian males, with and without hearing aids. The results of this study showed that female African American and Caucasian judges rated males of their respective races differently. The hearing aid effect was predominant among the Caucasian judges across the dimensions of appearance, personality, assertiveness, and achievement. In contrast, the African American judges only exhibited a hearing aid effect on the appearance dimension.

A Support Program

1994 ◽  
Vol 25 (2) ◽  
pp. 112-114 ◽  
Author(s):  
Henna Grunblatt ◽  
Lisa Daar
Keyword(s):  
Hearing Aids ◽  
School Counselor ◽  
Support Program ◽  
Educational Audiology ◽  
Part Program ◽  
One To One

A program for providing information to children who are deaf about their deafness and addressing common concerns about deafness is detailed. Developed by a school audiologist and the school counselor, this two-part program is geared for children from 3 years to 15 years of age. The first part is an educational audiology program consisting of varied informational classes conducted by the audiologist. Five topics are addressed in this part of the program, including basic audiology, hearing aids, FM systems, audiograms, and student concerns. The second part of the program consists of individualized counseling. This involves both one-to-one counseling sessions between a student and the school counselor, as well as conjoint sessions conducted—with the student’s permission—by both the audiologist and the school counselor.

Equivalent Noise Dose Obtained Through Hearing Aids in the Classrooms of Hearing-Impaired Children

1990 ◽  
Vol 21 (3) ◽  
pp. 147-150
Author(s):  
Ronald A. Wilde
Keyword(s):  
Hearing Aids ◽  
High Gain ◽  
Hearing Impaired ◽  
Deaf Children ◽  
Impaired Children ◽  
Very High ◽  
Hearing Impaired Children

A commercial noise dose meter was used to estimate the equivalent noise dose received through high-gain hearing aids worn in a school for deaf children. There were no significant differences among nominal SSPL settings and all SSPL settings produced very high equivalent noise doses, although these are within the parameters of previous projections.

Students as Active Participants in Hearing Aid Maintenance

1992 ◽  
Vol 23 (3) ◽  
pp. 208-213 ◽  
Author(s):  
Marsha Lipscomb ◽  
Peggy Von Almen ◽  
James C. Blair
Keyword(s):  
Inner City ◽  
Hearing Aids ◽  
School System ◽  
Regular Education ◽  
Hearing Aid ◽  
Hearing Impairments ◽  
City School

Twenty students between the ages of 6 and 19 years who were receiving services for students with hearing impairments in a metropolitan, inner-city school system were trained to monitor their own hearing aids. This study investigated the effect of this training on the percentage of students who wore functional hearing aids. Ten of the students received fewer than 3 hours of instruction per day in the regular education setting and generally had hearing losses in the severe to profound range. The remaining 10 students received greater than 3 hours of instruction per day in the regular education setting and had hearing losses in the moderate to severe range. The findings indicated improved hearing aid function when students were actively involved in hearing aid maintenance programs. Recommendations are made concerning hearing aid maintenance in the schools.

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