Loudness of tone pulses in a free field.
Loudness of tone pulses in a free field.
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自由场中音调脉冲的响度。
DOI：
10.1121/1.385915
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发表时间：
1981
期刊：
影响因子：
--
通讯作者：
T. Poulsen
中科院分区：
文献类型：
--
作者：
T. Poulsen
已经进行了音调脉冲的时间响度总和的调查。调查包括具有1：2的持续时间比的音调脉冲对之间的相等响度确定，以及相同音调脉冲的阈值确定。脉冲持续时间范围为5至640 ms。频率为500、1000和4000 Hz。所有脉冲均通过1/3倍频程滤波器进行整形。对于25名听力正常的观察者，在观察者的阈值以及35和55 dB SPL下进行调查。将实验数据拟合为单个指数函数，在阈值附近和阈值处产生约200 ms的时间常数（tau），而在远高于阈值的水平处tau约为100 ms。然而，在这个单时间常数模型和最短持续时间的脉冲所获得的实验数据之间存在着分歧。为了说明这一点，提出了一个模型，包括两个指数函数的组合。这产生了5至10 ms的短时间常数与上述较长常数相结合。
Investigations of temporal loudness summation of tone pulses have been performed. The investigations comprised equal loudness determinations between pairs of tone pulses with a duration ratio of 1:2, and threshold determinations of the same tone pulses. Pulse duration ranged from 5 to 640 ms. The frequencies were 500, 1000, and 4000 Hz. All pulses were shaped by means of 1/3 octave filters. For 25 normal hearing observers the investigations were performed at the observer's threshold, and at 35 and 55 dB SPL. Fitting of the experimental data to a single exponential function yields a time constant (tau) of about 200 ms near and at the threshold, whereas tau is about 100 ms at levels well above threshold. Discrepancies exist, nevertheless, between this single-time-constant model and the experimental data obtained for the pulses of shortest duration. To account for this, a model is proposed comprising a combination of two exponential functions. This yields a short time constant of 5 to 10 ms combined with the longer constant mentioned above.