Objective evaluation of binaural summation through acoustic reflex measures

Rawool, Vishakha W.; Parrill, Madaline

doi:10.1080/14992027.2018.1435914

Cited by 7 publications

(3 citation statements)

References 40 publications

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“…In studies using click stimulus as activator, the stimulus was presented bilaterally, and middle ear muscle reflexes were examined [23,24]. Compared to clinical acoustic reflex testing, its use is not common in routine evaluation, but this method also suggests that it may be a good tool to evaluate the level of superior olivary complex (SOC) involved in the acoustic reflex arc.…”

Section: Discussionmentioning

confidence: 99%

“…In studies using click stimulus as activator, it was found that the thresholds obtained by simultaneously presenting reflex activating clicks to one ear and the probe tone to the other ear were lower than the thresholds obtained by alternately presenting [23] and the reflex thresholds that increase non-monotonically with frequency have been found to be lower than clinical tympanometry [24].…”

Section: Stimulus Typementioning

confidence: 96%

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The effects of changes in stimulus properties on acoustic stapedius reflex response: a systematic review

Başöz

Oktay

Kuru

et al. 2022

Egypt J Otolaryngol

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Background The acoustic stapedius reflex is formed by the contraction of the stapedius muscle in the middle ear cavity when a loud sound is given to both ears. Changes in properties such as the intensity, frequency, duration, and speed of stimulus affect reflex responses. Methods As a result of the literature review conducted between 2005 and 2020, 2846 articles were reviewed and 30 articles evaluating the effects of stimulus changes on acoustic reflex responses were included in the study. Main text In the studies reviewed, it was observed that lower threshold values were obtained by using noise as a stimulus instead of pure sound. Different results were found regarding the duration and frequency of the stimulus. It has been reported that stimulus frequency does not have a significant effect on acoustic reflex delays and the acoustic stapedius reflex threshold increases in the presence of opposite side noise. Conclusion As a result of the studies reviewed, it was seen that the changes in many properties of the stimulus that activate the middle ear muscles affected the reflex response.

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Section: Discussionmentioning

confidence: 99%

Section: Stimulus Typementioning

confidence: 96%

The effects of changes in stimulus properties on acoustic stapedius reflex response: a systematic review

Başöz

Oktay

Kuru

et al. 2022

Egypt J Otolaryngol

View full text Add to dashboard Cite

show abstract

“…The binaural summation effect might be regarded as a result of the loudness increase from one to two ears for unimodal bilateral and symmetric listening (Christen, 1980;Rawool and Parrill, 2018). It is well known that binaural summation does not occur in all HA users (Arkebauer et al, 1971;Allen et al, 2000).…”

Section: Bilateral Speech Perceptionmentioning

confidence: 99%

Speech Perception in Bilateral Hearing Aid Users With Different Grades of Asymmetric Hearing Loss

Hoppe

Hast

Hocke³

2022

Front. Neurosci.

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Hearing loss is associated with decreased speech perception as well as with changes in the auditory pathway. The effects of those changes on binaural speech perception with hearing aids are not yet fully understood. To provide further evidence on the functional changes of the auditory pathway, several speech perception tests (unilateral and bilateral, aided and unaided, in quiet, and in noise) were conducted in a population of 370 bilateral hearing aid users covering the entire range of the World Health Organization’s most recent classification of hearing loss. To characterize the effects of asymmetric hearing thresholds, a generalized linear model was used for regression analysis. The model revealed a detrimental effect of the poorer ears’ thresholds on both the unaided and the aided unilateral word recognition scores that were attained by the better ear. Moreover, aided binaural word recognition (in quiet and in noise) was affected to a degree that cannot be explained on the sole basis of bilateral summation. Thus, this study provides evidence that there is reorganization and altered functioning of the afferent and efferent auditory pathways due to asymmetric hearing loss. Consequently, more attention should be paid to provision with a hearing aid as early as possible, and separately for each ear.

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Audiology Clinical Practice Patterns in Acoustic Reflex Testing

et al. 2022

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Purpose: Periodic reports of audiology clinical practice patterns, including acoustic reflex threshold (ART) protocols, provide insights into trends and assist in clinical decision making. Therefore, the purpose of this study was to examine audiologists' ART protocols, factors influencing audiologists' decision to test, and considerations for mentoring Doctor of Audiology (AuD) students in ART testing. Method: This study used a paper survey distributed by mail to a random sample of audiologists. Participants were 102 audiologists, representing diversity across age, clinical experience, and work setting. The survey asked participants to provide (a) demographics, (b) ART protocols, (c) rationale for ART testing, and (d) perspectives on mentoring of ART testing. Results: When ART testing is conducted, 100% of respondents conduct ipsilateral ART testing, compared to 75% for contralateral testing. Most use 500-, 1000-, and 2000-Hz stimulus frequencies, and 56% report 4000 Hz. Patient-related factors are the primary reason participants cite for conducting, or not conducting, ART tests. Most supervisor-participants encourage AuD students to conduct ART tests, based on patient-centered and student learning–centered reasons, and use a variety of strategies to guide students when ART findings are unusual. Conclusions: Fewer than half (43%) of participants conduct ART testing for all new patients, suggesting it is ancillary to the standard test battery for most participants. When ART testing is conducted, ipsilateral testing only or a combination of ipsilateral and contralateral testing is used. Ongoing trends in ART testing include continued popularity of 500–2000 Hz and ipsilateral-only or ipsilateral plus contralateral testing. Supplemental Material: https://doi.org/10.23641/asha.21513987

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Objective evaluation of binaural summation through acoustic reflex measures

Abstract: Binaural summation was 4 dB or higher in 88% of the ears and 6 dB or higher in 76% of ears. Stimulation of six out of the total 120 (0.5%) ears resulted in worse thresholds in the simultaneous condition compared with the alternating condition, suggesting binaural interference.

Cited by 7 publications

References 40 publications

The effects of changes in stimulus properties on acoustic stapedius reflex response: a systematic review

The effects of changes in stimulus properties on acoustic stapedius reflex response: a systematic review

Speech Perception in Bilateral Hearing Aid Users With Different Grades of Asymmetric Hearing Loss

Audiology Clinical Practice Patterns in Acoustic Reflex Testing

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