Modulation detection interference with narrow‐band noise interferers
Modulation detection interference with narrow‐band noise interferers
复制标题
窄带噪声干扰的调制检测干扰
DOI：
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复制
发表时间：
2000
期刊：
影响因子：
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通讯作者：
T. Dau
中科院分区：
文献类型：
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作者：
J. Verhey;T. Dau
正弦（目标）载波的幅度调制的检测可能由于具有不同载波频率的调制声音（调制器）的存在而受损，称为调制检测干扰（MDI）。通常，频率较远的正弦幅度调制音调被用作调制器，并且如果调制器和目标调制速率相似，则增加目标调制阈值。在本研究中，窄带噪声被用作干扰器。测量了施加在音调载波上的5、10和50 Hz调制的检测阈值，作为噪声带宽（0-200 Hz）、载波和干扰器之间的频谱距离（0.5-4倍频程）、载波电平（40-80 dB SPL）和载波-干扰器电平差（0-30 dB）的函数。在所有条件下，噪声的固有波动干扰调制检测，在噪声带宽约两倍的调制频率的最大干扰。这种带宽依赖关系对应于...
The detection of amplitude modulation of a sinusoidal (target) carrier can be impaired by the presence of a modulated sound (interferer) with a different carrier frequency, referred to as modulation detection interference (MDI). Typically, sinusoidally amplitude‐modulated tones remote in frequency are used as the interferer, and the target modulation threshold is increased if the interferer‐ and target‐modulation rates are similar. In the present study, narrow‐band noise was used as the interferer. Detection thresholds for modulations of 5, 10, and 50 Hz imposed on tone carriers were measured as a function of noise bandwidth (0–200 Hz), the spectral distance between the carrier and interferer (0.5–4 octaves), the carrier level (40–80 dB SPL), and the carrier‐interferer level difference (0–30 dB). In all conditions, the intrinsic fluctuations of the noise interfered with modulation detection, with maximum interference at noise bandwidths about twice the modulation frequency. This bandwidth dependence corre...