Erdreich J
J Acoust Soc Am. 1980 Aug;68(2):440-5. doi: 10.1121/1.384755.
This paper addresses the question of whether the nonlinear amplitude response of the ear depends only on stimulus level or on both level and frequency. The level of the quadratic distortion product fh + fl was estimated using the tone-on-tone masking paradigm under a 2AFC transformed UP-DOWN procedure. The higher frequency tone (fh) was maintained at 1.2 times the lower (fl = 250, 500, 1000, or 2000 HZ). Changes in the maximum and minimum threshold as maskee phase changes, [the monaural phase effect (MPE) amplitude], changes in the phase of the aural distortion product, and changes in the growth of the combination tone amplitude were examined as functions of primary frequency and level. The results indicate that MPE amplitude is simply a function of S/N ratio between the combination tone and the masking at that frequency. Distortion product phase varies over 360 degrees with respect to the primary tones and is unrelated to primary frequency or intensity. Within listeners the range of distortion product phase is more narrow (70-90 deg) at a single frequency. The absolute level of the summation tone does not correlate well with primary frequency and the growth rate of the combination tone varies with frequency and observers over a range of 1.1-2.3 dB/dB. The results suggest frequency independent nonlinearity when the ratio of primary frequencies is constant.
本文探讨了耳朵的非线性振幅响应是否仅取决于刺激强度，还是同时取决于强度和频率这一问题。使用双刺激间隔掩蔽范式，在2AFC变换的上下程序下，估计二次失真产物fh + fl的强度。较高频率的音调（fh）保持在较低频率（fl = 250、500、1000或2000赫兹）的1.2倍。研究了随着掩蔽音相位变化，最大和最小阈值的变化[单耳相位效应（MPE）振幅]、听觉失真产物的相位变化以及组合音振幅增长的变化，这些都是作为基频和强度的函数进行考察的。结果表明，MPE振幅仅仅是该频率下组合音与掩蔽音之间信噪比的函数。失真产物相位相对于基音在360度范围内变化，且与基频或强度无关。在听众个体中，单一频率下失真产物相位的范围更窄（70 - 90度）。和音的绝对强度与基频的相关性不佳，组合音的增长率在1.1 - 2.3 dB/dB的范围内随频率和观察者而变化。结果表明，当基频之比恒定时，存在频率无关的非线性。
