Where the action is: Weber fractions as a function of sound pressure at low frequencies.
Where the action is: Weber fractions as a function of sound pressure at low frequencies.
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作用位置：韦伯分数作为低频声压的函数。
DOI：
10.1121/1.407370
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
Kelly P. Davidson
中科院分区：
文献类型：
--
作者：
L. M. Ward;Kelly P. Davidson
采用一种两种强制选择的自适应阶梯技术，测量了70、100、200、1000和10,000赫兹的音调脉冲的韦伯声强分数，声压水平的范围从略高于单个听众的绝对阈值到接近他们最高可容忍的SPL，采用了一种由1上3下规则控制的两种强制选择自适应楼梯技术。对四名听力正常、经历不同的听者的结果显示，尽管绝对值存在个体差异，但韦伯分数随着声压高于阈值而下降，并在中间SPLs处渐近。具有负指数的幂函数比对数函数更好地描述单个听众的数据。衡量函数曲率的幂函数指数的绝对值在70赫兹处最大，并随着频率的增加而下降，类似于将响度判断或简单反应时与刺激强度相关的幂函数指数随声音频率的不同而不同。
Weber fractions for sound intensity were measured for 70-, 100-, 200-, 1000-, and 10,000-Hz tone pulses at sound-pressure levels (SPLs) ranging from just above individual listeners' absolute thresholds to near their highest tolerable SPLs, using a two-alternative forced-choice adaptive staircase technique governed by a 1-up, 3-down rule. Results for four listeners with normal hearing and varying experience, despite individual differences in absolute values, showed Weber fractions that declined as sound pressure increased above threshold and asymptoted at intermediate SPLs. A power function with a negative exponent describes the data of the individual listeners better than a logarithmic function does. The absolute value of the exponent of the power function, which measures the curvature of the function, was largest at 70 Hz and declined with increasing frequency, similar to how exponents of power functions relating loudness judgments or simple reaction time to stimulus intensity differ with sound frequency.