Psychophysical evidence for auditory compression at low characteristic frequencies.
Psychophysical evidence for auditory compression at low characteristic frequencies.
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低特征频率下听觉压缩的心理物理学证据。
DOI：
10.1121/1.1538247
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
Vit Drga
中科院分区：
文献类型：
--
作者：
C. Plack;Vit Drga
心理物理学对压迫的估计通常假设基底膜对远低于特征频率(CF)的频率的反应是线性的。这里描述了两种估计压缩的技术，它们在低CFS时不依赖于这一假设。在实验1中，对于250、500和4000赫兹的纯音信号，测量了开频率和离频纯音掩蔽的前向掩蔽增长。250和500赫兹的开、离频掩蔽功能与4000赫兹的开频率掩蔽功能一样浅。在实验2中，屏蔽固定低电平信号所需的前向屏蔽电平作为屏蔽-信号间隔的函数被测量。对于同频屏蔽器，这些函数的斜率在250和4000赫兹的信号频率之间没有差别。在250赫兹时，150赫兹掩蔽者的斜率几乎和频率掩蔽者一样陡峭，而在4000赫兹时，2400赫兹掩蔽者的斜率比频率掩蔽者的要浅得多。结果表明，在低CFS时，人类听觉系统存在相当大的压缩，约为0.2-0.3分贝/分贝。此外，结果表明，在较低的CFS下，相对于CF，CFS压缩并不随刺激频率而变化很大。
Psychophysical estimates of compression often assume that the basilar-membrane response to frequencies well below characteristic frequency (CF) is linear. Two techniques for estimating compression are described here that do not depend on this assumption at low CFs. In experiment 1, growth of forward masking was measured for both on- and off-frequency pure-tone maskers for pure-tone signals at 250, 500, and 4000 Hz. The on- and off-frequency masking functions at 250 and 500 Hz were just as shallow as the on-frequency masking function at 4000 Hz. In experiment 2, the forward masker level required to mask a fixed low-level signal was measured as a function of the masker-signal interval. The slopes of these functions did not differ between signal frequencies of 250 and 4000 Hz for the on-frequency maskers. At 250 Hz, the slope for the 150-Hz masker was almost as steep as that for the on-frequency masker, whereas at 4000 Hz the slope for the 2400-Hz masker was much shallower than that for the on-frequency masker. The results suggest that there is substantial compression, of around 0.2-0.3 dB/dB, at low CFs in the human auditory system. Furthermore, the results suggest that at low CFs compression does not vary greatly with stimulation frequency relative to CF.
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影响因子：
2.4
作者：
Ruggero, MA;Rich, NC;Robles, L
通讯作者：
Robles, L
影响因子：
2.4
作者：
Buus, S;Müsch, H;Florentine, M
通讯作者：
Florentine, M
基底膜非线性对正常和受损听力中掩蔽周期模式形状的影响。
DOI：
10.1121/1.1356702
发表时间：
2001
期刊：
The Journal of the Acoustical Society of America
影响因子：
--
作者：
Wojtczak,M;Schroder,AC;Kong,YY;Nelson,DA
通讯作者：
Nelson,DA
影响因子：
2.4
作者：
Moore, BCJ;Vickers, DA;Oxenham, AJ
通讯作者：
Oxenham, AJ
影响因子：
2.4
作者：
Rhode, WS;Recio, A
通讯作者：
Recio, A