Mo Lingyan, Zhang Fan, Han Demin, Zhang Luo
Department of Otolaryngology Head and Neck Surgery, Beijing TongRen Hospital, Capital Medical University, Beijing, PR China.
ORL J Otorhinolaryngol Relat Spec. 2011;73(5):253-9. doi: 10.1159/000330040. Epub 2011 Aug 11.
To investigate interactions (if any) in the bone-conduction auditory steady-state response (BC ASSR) between multiple brief tones presented simultaneously.
500-, 1,000-, 2,000-, and 4,000-Hz brief tones, repeated at a rate of 77-101 Hz, were presented using a B-71 vibrator. BC ASSR thresholds and amplitudes at 50 dB nHL were measured in two conditions where the stimulus was either presented alone or together with other stimuli.
Significantly larger amplitudes in the single-stimulus condition were found at 50 dB nHL. However, there was no significant threshold difference between single- and multiple-stimulus conditions. The BC ASSR thresholds (means ± SD) at 500, 1,000, 2,000, and 4,000 Hz were 96.7 ± 9.7, 75.3 ± 11.5, 65.6 ± 7.4, and 57.8 ± 7.2 dB re 1 μN ppe, respectively.
Interactions occurred in the multiple-stimulus condition at high presentation levels, but not at threshold levels. The results of the present study imply that BC ASSR thresholds to multiple brief-tone stimuli can be assessed at the same time, at least in normal-hearing adults.
研究同时呈现多个短音时骨导听觉稳态反应（BC ASSR）中的相互作用（若存在）。
使用B - 71振动器呈现500Hz、1000Hz、2000Hz和4000Hz的短音，重复频率为77 - 101Hz。在刺激单独呈现或与其他刺激一起呈现的两种条件下，测量50dB nHL时的BC ASSR阈值和幅值。
在50dB nHL时，单刺激条件下的幅值显著更大。然而，单刺激和多刺激条件下的阈值没有显著差异。500Hz、1000Hz、2000Hz和4000Hz时的BC ASSR阈值（均值±标准差）分别为96.7±9.7、75.3±11.5、65.6±7.4和57.8±7.2dB re 1μN ppe。
在高呈现水平的多刺激条件下发生了相互作用，但在阈值水平未发生。本研究结果表明，至少在听力正常的成年人中，可以同时评估多个短音刺激的BC ASSR阈值。
