Exponential spectro-temporal modulation generation.

Exponential spectro-temporal modulation generation.
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指数谱时间调制产生。

DOI:
10.1121/10.0003604
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发表时间:
2021-03
期刊:
The Journal of the Acoustical Society of America
影响因子:
--
通讯作者:
Gallun FJ
Gallun FJ
中科院分区:
其他
文献类型:
--
作者:
Stavropoulos TA;Isarangura S;Hoover EC;Eddins DA;Seitz AR;Gallun FJ

文献摘要

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传统上,实时生成的频谱-时间调制噪声已执行的线性幅度尺度,部分是由于计算的限制。实验通常需要在对数幅度标度上为正弦的调制,这是由于许多感知和生理测量随着信号幅度的指数变化而线性缩放。本文提出了一种计算指数谱-时间调制的方法,表明它可以解析地表示为线性偏移边带之和,其分量幅度等于第一类修正贝塞尔函数的值。这种方法大大提高了激励生成的效率和精度,有利于实时生成广泛的载波和包络信号。
Traditionally, real-time generation of spectro-temporally modulated noise has been performed on a linear amplitude scale, partially due to computational constraints. Experiments often require modulation that is sinusoidal on a logarithmic amplitude scale as a result of the many perceptual and physiological measures which scale linearly with exponential changes in the signal magnitude. A method is presented for computing exponential spectro-temporal modulation, showing that it can be expressed analytically as a sum over linearly offset sidebands with component amplitudes equal to the values of the modified Bessel function of the first kind. This approach greatly improves the efficiency and precision of stimulus generation over current methods, facilitating real-time generation for a broad range of carrier and envelope signals.
DOI: 10.1103/revmodphys.12.47
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