Effects of perturbation magnitude and voice F0 level on the pitch-shift reflex
Effects of perturbation magnitude and voice F0 level on the pitch-shift reflex
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DOI：
10.1121/1.2800254
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发表时间：
2007-12-01
影响因子：
2.4
通讯作者：
Larson, Charles R.
中科院分区：
文献类型：
--
作者：
Liu, Hanjun;Larson, Charles R.
本研究的目的是调查音调反射对小幅度刺激和语音基频 (F-0) 水平的响应性。讲英语的人在高和低 F-0 级别的元音发声过程中收到音调变化的语音反馈（+/- 10、20、30、40 和 50 音分，持续时间 200 毫秒）。平均音调响应幅度随着音调变化刺激幅度的函数而增加，但当以刺激幅度的百分比表示时，从 +/- 10 美分刺激的 100% 下降到 +/- 50 美分刺激的 37%。与低 F0 水平（13 美分；152 毫秒）相比，高 F0 水平（16 美分；130 毫秒）的响应幅度更大，延迟更短。本研究的数据表明，声音响应幅度等于小扰动幅度，并且高 F0 声音的声音响应幅度更大、更快。这些结果表明，音频-语音系统最适合补偿小音调而不是较大的扰动。数据还表明：音频-语音系统对语音扰动的敏感性可能随 F-0 级别而变化。 (c) 2007 年美国声学学会。
The purpose of the present study was to investigate the responsiveness of the pitch-shift reflex to small magnitude stimuli and voice fundamental frequency (F-0) level. English speakers received pitch-shifted voice feedback (+/- 10, 20, 30, 40, and 50 cents, 200 ms duration) during vowel phonations at a high and a low F-0 level. Mean pitch-shift response magnitude increased as a function,of pitch-shift stimulus magnitude, but when expressed as a percent of stimulus magnitude, declined from 100% with +/- 10 cents to 37% with +/- 50 cents stimuli. Response magnitudes were larger and latencies were shorter with a high F0 level (16 cents; 130 ms) compared to a low F0 level (13 cents; 152 ms). Data from the present study demonstrate that vocal response magnitudes are equal to small perturbation magnitudes, and they are larger and faster with a high F0 voice. These results suggest that the audio-vocal system is optimally suited for compensating for small pitch rather than larger perturbations. Data also suggest the sensitivity of the:audio-vocal system to voice perturbation may vary with F-0 level. (c) 2007 Acoustical Society of America.