The Effects of Aging on Speech Perception in Noise: Comparison between Normal-Hearing and Cochlear-Implant Listeners

Jin, Su-Hyun; Liu, Chang; Sladen, Douglas P.

doi:10.3766/jaaa.25.7.4

Cited by 30 publications

(24 citation statements)

References 33 publications

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“…Respective speech recognition of the CI ear is poorer compared to the NH ear, which is in accordance with previous reports on CI recipients [Zeng, 2004;Jin et al, 2014]. Interestingly, the monotic speech recognition is differently influenced by the segmentation rate in the NH and CI ears listening conditions, respectively.…”

Section: Discussionsupporting

confidence: 81%

Binaural Integration of Periodically Alternating Speech following Cochlear Implantation in Subjects with Profound Sensorineural Unilateral Hearing Loss

Wesarg

Richter

Hessel³

et al. 2015

Audiol Neurotol

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In cochlear implant (CI) recipients with unilateral hearing loss (UHL) and normal hearing (NH) in the contralateral ear, the central auditory system receives signals of different auditory modalities, i.e. electrically via the CI ear as well as acoustically via the NH ear. The present study investigates binaural integration of bimodal stimulation in the central auditory system of 10 CI subjects with UHL by applying a modified version of the Rapidly Alternating Speech Perception (RASP) test to characterise speech recognition ability under monotic and dichotic listening arrangements. Subsequently, the results for each monotic and dichotic test condition were compared to quantify the binaural benefit from CI usage. The study results demonstrate significantly improved speech recognition under dichotic compared to monotic listening conditions, providing evidence that there is binaural integration of acoustically and electrically transmitted speech segments in the central nervous system at brainstem and cortical levels. In contrast to more commonly used tests of binaural integration, such as localisation, the RASP test provides the clinical option to investigate binaural integration involving structures at the cortical level.

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Section: Discussionsupporting

confidence: 81%

Binaural Integration of Periodically Alternating Speech following Cochlear Implantation in Subjects with Profound Sensorineural Unilateral Hearing Loss

Wesarg

Richter

Hessel³

et al. 2015

Audiol Neurotol

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“…The performance of older adults under different noise conditions was previously studied [31,32], and our finding of WN being the most difficult condition comply with them [1,33]. The increase in noise level caused a decrease in speech perception, depending on age group, noise, and context conditions (table 1).…”

Section: Discussionmentioning

confidence: 74%

The Effect of Age and Type of Noise on Speech Perception under Conditions of Changing Context and Noise Levels

Taitelbaum-Swead

Fostick²

2016

Folia Phoniatr Logop

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Objective: Everyday life includes fluctuating noise levels, resulting in continuously changing speech intelligibility. The study aims were: (1) to quantify the amount of decrease in age-related speech perception, as a result of increasing noise level, and (2) to test the effect of age on context usage at the word level (smaller amount of contextual cues). Patients and Methods: A total of 24 young adults (age 20-30 years) and 20 older adults (age 60-75 years) were tested. Meaningful and nonsense one-syllable consonant-vowel-consonant words were presented with the background noise types of speech noise (SpN), babble noise (BN), and white noise (WN), with a signal-to-noise ratio (SNR) of 0 and -5 dB. Results: Older adults had lower accuracy in SNR = 0, with WN being the most difficult condition for all participants. Measuring the change in speech perception when SNR decreased showed a reduction of 18.6-61.5% in intelligibility, with age effect only for BN. Both young and older adults used less phonemic context with WN, as compared to other conditions. Conclusion: Older adults are more affected by an increasing noise level of fluctuating informational noise as compared to steady-state noise. They also use less contextual cues when perceiving monosyllabic words. Further studies should take into consideration that when presenting the stimulus differently (change in noise level, less contextual cues), other perceptual and cognitive processes are involved.

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“…There are many factors that are known to affect performance when hearing through a cochlear implant, for example age correlates both with acoustical hearing abilities as well as with central processing abilities (Gates and Mills 2005; Humes et al 2012; Jin et al 2014; Park et al 2015). Although there was significant overlap between the ages of the participants in the implanted and normal-hearing cohorts ( Table 1 ), their mean ages were different (Mann-Whitney U-test, p<0.01).…”

Section: Resultsmentioning

confidence: 99%

Cortical Activation Patterns Correlate with Speech Understanding After Cochlear Implantation

et al. 2016

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Objectives Cochlear implants are a standard therapy for deafness, yet the ability of implanted patients to understand speech varies widely. To better understand this variability in outcomes, we used functional near-infrared spectroscopy (fNIRS) to image activity within regions of the auditory cortex and compare the results to behavioral measures of speech perception. Design We studied 32 deaf adults hearing through cochlear implants and 35 normal-hearing controls. We used fNIRS to measure responses within the lateral temporal lobe and the superior temporal gyrus to speech stimuli of varying intelligibility. The speech stimuli included normal speech, channelized speech (vocoded into 20 frequency bands), and scrambled speech (the 20 frequency bands were shuffled in random order). We also used environmental sounds as a control stimulus. Behavioral measures consisted of the Speech Reception Threshold, CNC words, and AzBio Sentence tests measured in quiet. Results Both control and implanted participants with good speech perception exhibited greater cortical activations to natural speech than to unintelligible speech. In contrast, implanted participants with poor speech perception had large, indistinguishable cortical activations to all stimuli. The ratio of cortical activation to normal speech to that of scrambled speech directly correlated with the CNC Words and AzBio Sentences scores. This pattern of cortical activation was not correlated with auditory threshold, age, side of implantation, or time after implantation. Turning off the implant reduced cortical activations in all implanted participants. Conclusions Together, these data indicate that the responses we measured within the lateral temporal lobe and the superior temporal gyrus correlate with behavioral measures of speech perception, demonstrating a neural basis for the variability in speech understanding outcomes after cochlear implantation.

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The Effects of Aging on Speech Perception in Noise: Comparison between Normal-Hearing and Cochlear-Implant Listeners

Cited by 30 publications

References 33 publications

Binaural Integration of Periodically Alternating Speech following Cochlear Implantation in Subjects with Profound Sensorineural Unilateral Hearing Loss

Binaural Integration of Periodically Alternating Speech following Cochlear Implantation in Subjects with Profound Sensorineural Unilateral Hearing Loss

The Effect of Age and Type of Noise on Speech Perception under Conditions of Changing Context and Noise Levels

Cortical Activation Patterns Correlate with Speech Understanding After Cochlear Implantation

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