scholarly journals Neural auditory contrast enhancement in humans

2021 ◽  
Vol 118 (29) ◽  
pp. e2024794118
Author(s):  
Anahita H. Mehta ◽  
Lei Feng ◽  
Andrew J. Oxenham
Keyword(s):  
Contrast Enhancement ◽  
Cochlear Implants ◽  
Hearing Aids ◽  
Empirical Support ◽  
Neural Representation ◽  
Target Sound ◽  
State Response ◽  
Auditory Enhancement ◽  
Auditory Steady State Response ◽  
Novel Objects

The perception of sensory events can be enhanced or suppressed by the surrounding spatial and temporal context in ways that facilitate the detection of novel objects and contribute to the perceptual constancy of those objects under variable conditions. In the auditory system, the phenomenon known as auditory enhancement reflects a general principle of contrast enhancement, in which a target sound embedded within a background sound becomes perceptually more salient if the background is presented first by itself. This effect is highly robust, producing an effective enhancement of the target of up to 25 dB (more than two orders of magnitude in intensity), depending on the task. Despite the importance of the effect, neural correlates of auditory contrast enhancement have yet to be identified in humans. Here, we used the auditory steady-state response to probe the neural representation of a target sound under conditions of enhancement. The probe was simultaneously modulated in amplitude with two modulation frequencies to distinguish cortical from subcortical responses. We found robust correlates for neural enhancement in the auditory cortical, but not subcortical, responses. Our findings provide empirical support for a previously unverified theory of auditory enhancement based on neural adaptation of inhibition and point to approaches for improving sensory prostheses for hearing loss, such as hearing aids and cochlear implants.

scholarly journals Neural auditory contrast enhancement in humans

2018 ◽  
Author(s):  
Anahita H. Mehta ◽  
Lei Feng ◽  
Andrew J. Oxenham
Keyword(s):  
Contrast Enhancement ◽  
Hearing Aids ◽  
General Principle ◽  
Empirical Support ◽  
Perceptual Constancy ◽  
Target Sound ◽  
Biologically Relevant ◽  
Auditory Enhancement ◽  
Auditory Steady State Response ◽  
Novel Objects

AbstractThe perception of sensory events can be suppressed or enhanced by the surrounding spatial and temporal context in ways that help in detecting novel objects and establishing perceptual constancy. In the auditory system, the phenomenon known as auditory enhancement reflects a general principle of contrast enhancement, where a target sound embedded within a background sound becomes perceptually more salient if the background is presented first by itself. This effect is highly robust, producing an effective enhancement of the target of between 5 and 25 dB (more than two orders of magnitude in intensity), depending on the task. Despite their ubiquity in vision, neural correlates of auditory contrast enhancement have yet to be identified in humans. Here we used the auditory steady-state response to probe the neural response to a target sound under conditions of enhancement. The probe was simultaneously modulated in amplitude with two modulation frequencies, to distinguish cortical from subcortical contributions to this phenomenon. We found robust auditory cortical, but not subcortical, enhancement that correlates with behavior and is consistent with an early theoretical model that postulates neural adaptation of inhibition. Our findings provide empirical support for a previously unverified theory of auditory enhancement and point to new approaches for improving sensory prostheses for hearing loss, such as hearing aids and cochlear implants.Significance StatementA target sound embedded within a background sound becomes perceptually more salient if the background is presented first by itself. This phenomenon, where the target “pops out”, is known as auditory enhancement. It reflects a general principle of contrast enhancement, and helps in the detection of new acoustic events in the environment and in establishing the perceptual constancy of speech and other biologically relevant sounds under varying acoustic conditions. We use EEG in humans to reveal a cortical correlate of this perceptual phenomenon that provides empirical support for a longstanding but previously unverified theoretical account.

scholarly journals Auditory steady state response in hearing assessment in infants with cytomegalovirus

2013 ◽  
Vol 31 (4) ◽  
pp. 550-553 ◽  
Author(s):  
Daniela Polo C. Silva ◽  
Priscila Suman Lopez ◽  
Jair Cortez Montovani
Keyword(s):  
Hearing Loss ◽  
Steady State ◽  
Hearing Aids ◽  
Otoacoustic Emissions ◽  
Steady State Response ◽  
Case Description ◽  
Congenital Cytomegalovirus ◽  
State Response ◽  
Auditory Steady State Response ◽  
Brainstem Response

OBJECTIVE: To report an infant with congenital cytomegalovirus and progressive sensorineural hearing loss, who was assessed by three methods of hearing evaluation. CASE DESCRIPTION: In the first audiometry, at four months of age, the infant showed abnormal response in Otoacoustic Emissions and normal Auditory Brainstem Response (ABR), with electrophysiological threshold in 30dBnHL, in both ears. With six months of age, he showed bilateral absence of the ABR at 100dBnHL. The behavioral observational audiometry was impaired due to the delay in neuropsychomotor development. At eight months of age, he was submitted to Auditory Steady State Response (ASSR) and the thresholds were 50, 70, absent in 110 and in 100dB, respectively for 500, 1,000, 2,000 and 4,000Hz in the right ear, and 70, 90, 90 and absent in 100dB, respectively for 500, 1,000, 2,000 and 4,000Hz in the left ear. COMMENTS: In the first evaluation, the infant had abnormal Otoacoustic Emission and normal ABR, which became altered at six months of age. The hearing loss severity could be identified only by the ASSR, which allowed the best procedure for hearing aids adaptation. The case description highlights the importance of the hearing status follow-up for children with congenital cytomegalovirus.

scholarly journals The Auditory Enhancement Effect is Not Reflected in the 80-Hz Auditory Steady-State Response

2014 ◽  
Vol 15 (4) ◽  
pp. 621-630 ◽  
Author(s):  
Samuele Carcagno ◽  
Christopher J. Plack ◽  
Arthur Portron ◽  
Catherine Semal ◽  
Laurent Demany
Keyword(s):  
Steady State ◽  
Enhancement Effect ◽  
Steady State Response ◽  
State Response ◽  
Auditory Enhancement ◽  
Auditory Steady State Response

Evaluation of residual hearing in cochlear implants candidates using auditory steady-state response

2015 ◽  
Vol 135 (3) ◽  
pp. 246-253 ◽  
Author(s):  
Henrique Faria Ramos ◽  
Signe Schuster Grasel ◽  
Roberto Miquelino de Oliveira Beck ◽  
Marystella Tomoe Takahashi-Ramos ◽  
Bernardo Faria Ramos ◽  
...  
Keyword(s):  
Steady State ◽  
Cochlear Implants ◽  
Residual Hearing ◽  
Steady State Response ◽  
State Response ◽  
Auditory Steady State Response

scholarly journals Erratum to: The Auditory Enhancement Effect is Not Reflected in the 80-Hz Auditory Steady-State Response

2014 ◽  
Vol 15 (4) ◽  
pp. 631-631
Author(s):  
Samuele Carcagno ◽  
Christopher J. Plack ◽  
Arthur Portron ◽  
Catherine Semal ◽  
Laurent Demany
Keyword(s):  
Steady State ◽  
Enhancement Effect ◽  
Steady State Response ◽  
State Response ◽  
Auditory Enhancement ◽  
Auditory Steady State Response

Foundations of Language Development in Deaf and Hard-of-Hearing Infants

2020 ◽  
pp. 19-32
Author(s):  
Dani Levine ◽  
Daniela Avelar ◽  
Roberta Michnick Golinkoff ◽  
Kathy Hirsh-Pasek ◽  
Derek M. Houston
Keyword(s):  
Language Development ◽  
Language Learning ◽  
Cochlear Implants ◽  
Hearing Aids ◽  
Hard Of Hearing ◽  
Social Processes ◽  
Effective Interventions ◽  
Hearing Devices ◽  
Language Input ◽  
Hearing Children

Copious evidence indicates that, even in the first year of life, children’s language development is beginning and is impacted by a wide array of cognitive and social processes. The extent to which these processes are dependent on early language input is a critical concern for most deaf and hard-of-hearing (DHH) children, who, unlike hearing children, are usually not immersed in a language-rich environment until effective interventions, such as hearing aids or cochlear implants, are implemented. Importantly, some cognitive and social processes are not dependent on the early availability of language input and begin to develop before children are fitted for hearing aids or cochlear implants. Interventions involving parent training may be helpful for enhancing social underpinnings of language and for maximizing DHH children’s language learning once effective hearing devices are in place. Similarly, cognitive training for DHH children may also provide benefit to bolster language development.

scholarly journals Integrated Bimodal Fitting for Unilateral CI Users with Residual Contralateral Hearing

2021 ◽  
Vol 11 (2) ◽  
pp. 200-206
Author(s):  
Gennaro Auletta ◽  
Annamaria Franzè ◽  
Carla Laria ◽  
Carmine Piccolo ◽  
Carmine Papa ◽  
...  
Keyword(s):  
Cochlear Implants ◽  
Hearing Aids ◽  
Speech Intelligibility ◽  
Hearing Aid ◽  
Performance Difference ◽  
Test Conditions ◽  
Significant Difference ◽  
Noisy Conditions ◽  
New Formula ◽  
Better Than

Background: The aim of this study was to compare, in users of bimodal cochlear implants, the performance obtained using their own hearing aids (adjusted with the standard NAL-NL1 fitting formula) with the performance using the Phonak Naìda Link Ultra Power hearing aid adjusted with both NAL-NL1 and a new bimodal system (Adaptive Phonak Digital Bimodal (APDB)) developed by Advanced Bionics and Phonak Corporations. Methods: Eleven bimodal users (Naìda CI Q70 + contralateral hearing aid) were enrolled in our study. The users’ own hearing aids were replaced with the Phonak Naìda Link Ultra Power and fitted following the new formula. Speech intelligibility was assessed in quiet and noisy conditions, and comparisons were made with the results obtained with the users’ previous hearing aids and with the Naída Link hearing aids fitted with the NAL-NL1 generic prescription formula. Results: Using Phonak Naìda Link Ultra Power hearing aids with the Adaptive Phonak Digital Bimodal fitting formula, performance was significantly better than that with the users’ own rehabilitation systems, especially in challenging hearing situations for all analyzed subjects. Conclusions: Speech intelligibility tests in quiet settings did not reveal a significant difference in performance between the new fitting formula and NAL-NL1 fittings (using the Naída Link hearing aids), whereas the performance difference between the two fittings was very significant in noisy test conditions.

The Auditory Steady-State Response: Full-Term and Premature Neonates

2002 ◽  
Vol 13 (05) ◽  
pp. 260-269 ◽  
Author(s):  
Barbara Cone-Wesson ◽  
John Parker ◽  
Nina Swiderski ◽  
Field Rickards
Keyword(s):  
Steady State ◽  
Premature Infants ◽  
Modulation Frequency ◽  
Otoacoustic Emission ◽  
Full Term ◽  
Steady State Response ◽  
Pass Rates ◽  
Term Infants ◽  
State Response ◽  
Auditory Steady State Response

Two studies were aimed at developing the auditory steady-state response (ASSR) for universal newborn hearing screening. First, neonates who had passed auditory brainstem response, transient evoked otoacoustic emission, and distortion-product otoacoustic emission tests were also tested with ASSRs using modulated tones that varied in frequency and level. Pass rates were highest (> 90%) for amplitude-modulated tones presented at levels ≥ 69 dB SPL. The effect of modulation frequency on ASSR for 500- and 2000-Hz tones was evaluated in full-term and premature infants in the second study. Full-term infants had higher pass rates for 2000-Hz tones amplitude modulated at 74 to 106 Hz compared with pass rates for a 500-Hz tone modulated at 58 to 90 Hz. Premature infants had lower pass rates than full-term infants for both carrier frequencies. Systematic investigation of ASSR threshold and the effect of modulation frequency in neonates is needed to adapt the technique for screening.

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