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.
|Number of pages||1|
|Publication status||Published - 2019|
|Event||British Society of Audiology e-conference (3rd : 2019) - Online|
Duration: 4 Dec 2019 → 4 Dec 2019
|Conference||British Society of Audiology e-conference (3rd : 2019)|
|Period||4/12/19 → 4/12/19|