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[Relationships between electrophysiological characteristic of speech evoked auditory brainstem response and Mandarin
1Department of Otorhinolaryngology Head and Neck Surgery, Guangdong No.2 Provincial People's Hospital, Guangzhou 510317, China.
Objective:
To investigate the relationships between electrophysiological characteristic of speech evoked auditory brainstem response(s-ABR) and Mandarin phonetically balanced maximum(PBmax) at different hearing impairment, so as to provide more clues for the mechanism of speech cognitive behavior.
Method:
Forty-one ears in 41 normal hearing adults(NH), thirty ears in 30 conductive hearing loss patients(CHL) and twenty-seven ears in 27 sensorineural hearing loss patients(SNHL) were included in present study. The speech discrimination scores were obtained by Mandarin phonemic-balanced monosyllable lists via speech audiometric software. Their s-ABRs were recorded with speech syllables /da/ with the intensity of phonetically balanced maximum(PBmax). The electrophysiological characteristic of s-ABR, as well as the relationships between PBmax and s-ABR parameters including latency in time domain, fundamental frequency(F0) and first formant(F1) in frequency domain were analyzed statistically.
Results:
All subjects completed good speech perception tests and PBmax of CHL and SNHL had no significant difference (P>0.05), but both significantly less than that of NH (P<0.05). While divided the subjects into three groups by 90%
Conclusions:
These electrophysiological characteristics of s-ABR showed closely and stably associated with Mandarin monosyllable discriminative abilities at different hearing impairment. Some electrophysiological characteristics such as amplitudes of F0 and F1, latencies of peak F and A may play more important roles in speech recognition assess, which may be applied combined or separately to further investigation of speech perception and temporal processing abilities.
