Rostami Soheila, Moossavi Abdollah
Department of Audiology, Faculty of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran.
Department of Otolaryngology, Head and Neck Surgery, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran.
Audiol Res. 2017 Aug 30;7(2):185. doi: 10.4081/audiores.2017.185. eCollection 2017 Jul 18.
Musical training strengthens segregation the target signal from background noise. Musicians have enhanced stream segregation, which can be considered a process similar to comodulation masking release. In the current study, we surveyed psychoacoustical comodulation masking release in musicians and non-musicians. We then recorded the brainstem responses to complex stimuli in comodulated and unmodulated maskers to investigate the effect of musical training on the neural representation of comodulation masking release for the first time. The musicians showed significantly greater amplitudes and earlier brainstem response timing for stimulus in the presence of comodulated maskers than non-musicians. In agreement with the results of psychoacoustical experiment, musicians showed greater comodulation masking release than non-musicians. These results reveal a physiological explanation for behavioral enhancement of comodulation masking release and stream segregation in musicians.
音乐训练增强了从背景噪声中分离目标信号的能力。音乐家具有更强的流分离能力，这一过程可被视为类似于共调制掩蔽释放的过程。在本研究中，我们调查了音乐家和非音乐家的心理声学共调制掩蔽释放情况。然后，我们记录了在有调制和无调制掩蔽器情况下，脑干对复杂刺激的反应，首次研究了音乐训练对共调制掩蔽释放神经表征的影响。与非音乐家相比，音乐家在有调制掩蔽器存在时，对刺激的脑干反应幅度明显更大，且反应时间更早。与心理声学实验结果一致，音乐家比非音乐家表现出更大的共调制掩蔽释放。这些结果揭示了音乐家共调制掩蔽释放和流分离行为增强的生理学解释。
