正常聽力者與聽力受損者對類母音刺激中頻率變化的行為與皮質反應

// Behavioral and Cortical Responses to Frequency Changes in Vowel-Like Stimuli in Listeners With Normal and Impaired Hearing

研究以聽覺變化複合波(ACC)偵測第二共振峰(F2)變化，作為元音頻譜分辨的客觀指標｜在正常與聽損者以 EEG 記錄發現：F2 步幅愈大 ACC 振幅愈高，聽損者反應減弱且與行為分辨閾值相關｜結果支持以語音刺激的 ACC 客觀評估頻率分辨，具臨床檢測與應用潛力

// The study tests a new method using the auditory change complex (ACC) to detect cortical responses to second-formant (F2) changes as an objective proxy for vowel spectral discrimination. Researchers presented vowel-like stimuli (four sinusoids matching formants of /u/ and /i/) with varying F2 step sizes while recording EEG in normal-hearing and hearing-impaired participants and compared ACCs to behavioral discrimination thresholds. Larger F2 changes produced larger ACC amplitudes, responses were reduced in hearing-impaired listeners, and ACC magnitude correlated with behavioral discrimination. These results support using the ACC with speech-like stimuli to objectively assess frequency discrimination and suggest clinical potential.

Published 2026年9月17日