The acoustic change complex (ACC) in infants with normal hearing

Vicky Zhang, Teresa Y. C. Ching, Ronny Ibrahim, Fabrice Bardy, Bram Van Dun, Gary Rance, Mridula Sharma, Donella Chisari, Harvey Dillon

    Research output: Contribution to conferenceAbstract


    Aims: To assess auditory speech discrimination in infants by recording the acoustic changecomplex (ACC), a cortical auditory evoked potential (CAEP) that reflects discriminationcapacity.Methods: Participants were 22 infants with normal hearing (NH), aged between 3 and 6months. To assess discrimination, the ACC was recorded in response to three contrastive pairs:a vowel contrast ([U]/ vs [I]), a voicing contrast ([S] vs [Z]), and a spectral-ripple noise (SRN).The SRN is a noise that is amplitude modulated in the frequency domain with or without a 90°phase-shift. The stimuli were presented in the free field at 20 sones. The HEARLab systemwas used for stimuli presentation and data acquisition. The data were post-processed using apurpose-designed Matlab script.Results: The detection rates for the onset cortical response were 100%, 90%, and 100% for [UI], and [S-Z], and SRN respectively. The discrimination rates were 98%, 93%, and 64% for therespective stimulus. Analysis of variance results showed no significant difference in the latencyof the first positive peak (P1) among different stimulus contrasts for both onset and ACCresponses (p > 0.05).Conclusions: The findings suggest that ACCs can be reliably recorded in infants with normalhearing. Future work will investigate the feasibility of measuring ACC in infants with hearingloss.
    Original languageEnglish
    Number of pages1
    Publication statusPublished - 2019
    EventBritish Society of Audiology e-conference (3rd : 2019) - Online
    Duration: 4 Dec 20194 Dec 2019


    ConferenceBritish Society of Audiology e-conference (3rd : 2019)
    Abbreviated titleBSA


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