Bonino Angela Yarnell, Leibold Lori J
J Acoust Soc Am. 2008 Nov;124(5):EL321-7. doi: 10.1121/1.2993745.
This study examined the effect of signal-temporal uncertainty on detection of a 120-ms, 1-kHz tone in the presence of a continuous sequence of 120-ms bursts of either a broadband noise or a random-frequency, two-tone complex. Using the method of constant stimuli, signal-temporal uncertainty was defined as the difference in threshold across temporally uncertain and temporally defined listening conditions. Results indicted an average effect of signal-temporal uncertainty of 2 dB for the noise masker compared to 9 dB for the random-frequency, two-tone masker. These results suggest that signal-temporal uncertainty may be more detrimental for conditions in which informational masking dominates performance.
本研究考察了在存在连续序列的120毫秒宽带噪声突发或随机频率双音复合音突发的情况下，信号时间不确定性对120毫秒、1千赫兹纯音检测的影响。使用恒定刺激法，信号时间不确定性被定义为时间不确定和时间确定的聆听条件下阈值的差异。结果表明，对于噪声掩蔽器，信号时间不确定性的平均影响为2分贝，而对于随机频率双音掩蔽器为9分贝。这些结果表明，信号时间不确定性对于信息掩蔽主导性能的情况可能更具损害性。
