中文摘要：

目的 探讨Blackman包络短音不同时程与ABR波形和潜伏期的关系.方法 采用Blackman包络的短音诱导豚鼠ABR,在0.5 kHz,其刺激时程分别为2、3、4、5 ms，在1、2、4、8 kHz,其刺激时程分别为1、2、3、4、5ms.结果随刺激音时程延长,刺激音频率特异性越好,但ABR波形分化逐渐变差,且波Ⅲ潜伏期随刺激时程的延长而延长.0.5 kHz在4 ms,1、2、4、8 kHz在2 ms或3 ms诱导的ABR波形分化好.结论 用短音诱导频率特异性ABR时,应优化刺激声条件,以取得刺激声的频率特异性和瞬态性的统一.

英文摘要：

Objective To explore the relationship between the duration of tone pip with Blackman envelop and morphology or latency of auditory brainstem responses. Methods ABRs were recorded using 0.5,1,2,4 and 8 kHz tone pips with Blackman envelope at different intervals. Results The longer the duration of stimulus was, the better the frequency specificity of stimulus was. However, the ABR morphology were affected and the lateneies of wave Ⅲwere prolonged. Conclusion When using tone pips to evokes ABR, stimuli should be well considered in order to produce better frequency specificity and transient state.