Perstimulatory reduction in the magnitude of the acoustic reflex, considered abnormal if it is reduced by over 50% of initial amplitude within 10 seconds of stimulus onset是什么意思_Perstimulatory reduction in the magnitude of the acoustic reflex, considered abnormal if it is reduced by over 50% of initial amplitude within 10 seconds of stimulus onset在线翻译_英语_读音_用法_例句