Electrophysiological responses of hearing‐impaired subjects to speech stimuli

1981 ◽  
Vol 70 (S1) ◽  
pp. S71-S71
Author(s):  
Samuel B. Polen ◽  
R. Patrick Greenwood ◽  
Carol Yoneda
Keyword(s):  
Hearing Impaired ◽  
Speech Stimuli ◽  
Electrophysiological Responses

Dissimilarity Ratings of English Consonants by Normally-Hearing and Hearing-Impaired Individuals

1979 ◽  
Vol 22 (2) ◽  
pp. 236-246 ◽  
Author(s):  
Jeffrey L. Danhauer ◽  
Ruth M. Lawarre
Keyword(s):  
Normal Hearing ◽  
Hearing Impaired ◽  
Interval Scale ◽  
Individual Group ◽  
Speech Stimuli ◽  
Paired Stimuli ◽  
Loudness Level ◽  
Comfortable Loudness

Perceptual patterns in rating dissimilarities among 24 CVs were investigated for a group of normal-hearing and two groups of hearing-impaired subjects (one group with flat, and one group with sloping, sensorineural losses). Stimuli were presented binaurally at most comfortable loudness level and subjects rated the 576 paired stimuli on a 1–7 equal-appearing interval scale. Ratings were submitted to individual group and combined INDSCAL analyses to describe features used by the subjects in their perception of the speech stimuli. Results revealed features such as sibilant, sonorant, plosive and place. Furthermore, normal and hearing-impaired subjects used similar features, and subjects' weightings of features were relatively independent of their audiometric configurations. Results are compared to those of previous studies.

scholarly journals The Influence of Tone Inventory on ERP without Focal Attention: A Cross-Language Study

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Hong-Ying Zheng ◽  
Gang Peng ◽  
Jian-Yong Chen ◽  
Caicai Zhang ◽  
James W. Minett ◽  
...  
Keyword(s):  
Phonological Processing ◽  
Feature Detection ◽  
Category Effect ◽  
Lexical Tone ◽  
Electrophysiological Response ◽  
Language Background ◽  
Speech Stimuli ◽  
Focal Attention ◽  
Electrophysiological Responses ◽  
Pitch Contours

This study investigates the effect of tone inventories on brain activities underlying pitch without focal attention. We find that the electrophysiological responses to across-category stimuli are larger than those to within-category stimuli when the pitch contours are superimposed on nonspeech stimuli; however, there is no electrophysiological response difference associated with category status in speech stimuli. Moreover, this category effect in nonspeech stimuli is stronger for Cantonese speakers. Results of previous and present studies lead us to conclude that brain activities to the same native lexical tone contrasts are modulated by speakers’ language experiences not only in active phonological processing but also in automatic feature detection without focal attention. In contrast to the condition with focal attention, where phonological processing is stronger for speech stimuli, the feature detection (pitch contours in this study) without focal attention as shaped by language background is superior in relatively regular stimuli, that is, the nonspeech stimuli. The results suggest that Cantonese listeners outperform Mandarin listeners in automatic detection of pitch features because of the denser Cantonese tone system.

Variability of Most Comfortable and Uncomfortable Loudness Levels to Speech Stimuli in the Hearing Impaired

1989 ◽  
Vol 10 (2) ◽  
pp. 94-100 ◽  
Author(s):  
Carol A. Sammeth ◽  
Marina Birman ◽  
Kurt E. Hecox
Keyword(s):  
Hearing Impaired ◽  
Speech Stimuli

Effects of Stimulus Presentation Level on Stop Consonant Identification in Normal-Hearing and Hearing-Impaired Listeners

2002 ◽  
Vol 13 (03) ◽  
pp. 154-159 ◽  
Author(s):  
Patrick N. Plyler ◽  
Mark S. Hedrick
Keyword(s):  
Stop Consonant ◽  
Stimulus Presentation ◽  
Normal Hearing ◽  
Hearing Impaired ◽  
Impaired Hearing ◽  
Boundary Values ◽  
Hearing Sensitivity ◽  
Speech Stimuli ◽  
Presentation Level ◽  
Boundary Shift

The purpose of the present study was to determine whether varying the presentation level of stop consonant stimuli resulted in similar phonetic boundary shifts for listeners with normal and impaired hearing. Sixteen normal-hearing and 16 hearing-impaired listeners categorized synthetic speech stimuli as /b/, /d/, or /g/. The onset frequency of F2 varied from 900 to 2300 Hz (100-Hz steps), and the presentation level varied from 92 to 62 dB SPL (10-dB steps) for each stimulus presentation. Hearing-impaired listeners had significantly more missing boundary values than normal-hearing listeners; however, the correlation between the number of missing boundary values and hearing sensitivity was not significant. Comparison of boundary shift with level demonstrated that hearing-impaired listeners had a smaller boundary shift with increasing level than normal-hearing listeners. The amount of boundary shift was not correlated with audibility. The results of the current study suggest that increasing the presentation level of a signal does not result in performance similar to that of listeners with normal hearing.

Teacher Identification of Elementary School Children with Hearing Loss

1978 ◽  
Vol 9 (1) ◽  
pp. 24-28 ◽  
Author(s):  
Richard H. Nodar
Keyword(s):  
Elementary School ◽  
Hearing Loss ◽  
School Children ◽  
Elementary School Children ◽  
Total Sample ◽  
Hearing Impaired ◽  
Teacher Interviews ◽  
Teacher Screening ◽  
Children With Hearing Loss ◽  
Hearing Problems

The teachers of 2231 elementary school children were asked to identify those with known or suspected hearing problems. Following screening, the data were compared. Teachers identified 5% of the children as hearing-impaired, while screening identified only 3%. There was agreement between the two procedures on 1%. Subsequent to the teacher interviews, rescreening and tympanometry were conducted. These procedures indicated that teacher screening and tympanometry were in agreement on 2% of the total sample or 50% of the hearing-loss group. It was concluded that teachers could supplement audiometry, particularly when otoscopy and typanometry are not available.

Systematic Modification of Parental Input to Train Language Symbols

1981 ◽  
Vol 12 (1) ◽  
pp. 4-12 ◽  
Author(s):  
Barbara Culatta ◽  
Donna Horn
Keyword(s):  
Language Learning ◽  
Meaningful Use ◽  
Hearing Impaired ◽  
Specific Language ◽  
Parental Input ◽  
Language Exposure ◽  
Therapy Sessions ◽  
Impaired Children ◽  
Hearing Impaired Children ◽  
At Home

This study attempted to maximize environmental language learning for four hearing-impaired children. The children's mothers were systematically trained to present specific language symbols to their children at home. An increase in meaningful use of these words was observed during therapy sessions. In addition, as the mothers began to generalize the language exposure strategies, an increase was observed in the children's use of words not specifically identified by the clinician as targets.

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.

Hearing Aid Amplification Reduces Communication Effort of People With Hearing Impairment and Their Conversation Partners

2020 ◽  
Vol 63 (4) ◽  
pp. 1299-1311 ◽  
Author(s):  
Timothy Beechey ◽  
Jörg M. Buchholz ◽  
Gitte Keidser
Keyword(s):  
Hearing Impairment ◽  
Hearing Aid ◽  
Normal Hearing ◽  
Referential Communication ◽  
Hearing Impaired ◽  
Directional Hearing ◽  
Acoustic Environment ◽  
Communication Task ◽  
Acoustic Environments ◽  
The Impact

Objectives This study investigates the hypothesis that hearing aid amplification reduces effort within conversation for both hearing aid wearers and their communication partners. Levels of effort, in the form of speech production modifications, required to maintain successful spoken communication in a range of acoustic environments are compared to earlier reported results measured in unaided conversation conditions. Design Fifteen young adult normal-hearing participants and 15 older adult hearing-impaired participants were tested in pairs. Each pair consisted of one young normal-hearing participant and one older hearing-impaired participant. Hearing-impaired participants received directional hearing aid amplification, according to their audiogram, via a master hearing aid with gain provided according to the NAL-NL2 fitting formula. Pairs of participants were required to take part in naturalistic conversations through the use of a referential communication task. Each pair took part in five conversations, each of 5-min duration. During each conversation, participants were exposed to one of five different realistic acoustic environments presented through highly open headphones. The ordering of acoustic environments across experimental blocks was pseudorandomized. Resulting recordings of conversational speech were analyzed to determine the magnitude of speech modifications, in terms of vocal level and spectrum, produced by normal-hearing talkers as a function of both acoustic environment and the degree of high-frequency average hearing impairment of their conversation partner. Results The magnitude of spectral modifications of speech produced by normal-hearing talkers during conversations with aided hearing-impaired interlocutors was smaller than the speech modifications observed during conversations between the same pairs of participants in the absence of hearing aid amplification. Conclusions The provision of hearing aid amplification reduces the effort required to maintain communication in adverse conditions. This reduction in effort provides benefit to hearing-impaired individuals and also to the conversation partners of hearing-impaired individuals. By considering the impact of amplification on both sides of dyadic conversations, this approach contributes to an increased understanding of the likely impact of hearing impairment on everyday communication.

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