O'Loughlin B J, Moore B C
J Acoust Soc Am. 1981 Apr;69(4):1119-25. doi: 10.1121/1.385691.
Off-frequency listening--the use of information in different frequency regions to improve performance in masking tasks--has been reported to influence psychoacoustical tuning curves measured in simultaneous masking. The present experiment was designed to establish whether suppression has an effect on off-frequency listening. Psychoacoustical tuning curves were obtained from three observers in both simultaneous and forward masking. A probe level of 10 dB SL and narrowband noise maskers were used. After obtaining the conventional tuning curves, a fixed masker, at either 1.8 or 2.2 kHz and 10 dB below the corresponding tuning-curve threshold, was added to limit off-frequency listening. In both simultaneous and forward masking, the branch of the tuning curve opposite the fixed masker was shifted downwards, but to a greater extent in forward masking. The suppression of the probe in tuning curves measured in simultaneous masking appears to constrain off-frequency listening. In forward-masking tuning curves, off-frequency listening has a greater effect, and may explain to a large extent the very sharp tuning which has been found in some studies.
异频聆听——利用不同频率区域的信息来提高掩蔽任务中的表现——据报道会影响在同时掩蔽中测量的心理声学调谐曲线。本实验旨在确定抑制是否对异频聆听有影响。在同时掩蔽和前掩蔽中从三名观察者那里获得了心理声学调谐曲线。使用了10 dB SL的探测音水平和窄带噪声掩蔽器。在获得常规调谐曲线后，添加一个固定掩蔽器，其频率为1.8 kHz或2.2 kHz，且比相应调谐曲线阈值低10 dB，以限制异频聆听。在同时掩蔽和前掩蔽中，与固定掩蔽器相对的调谐曲线分支都向下移动，但在前掩蔽中移动幅度更大。在同时掩蔽中测量的调谐曲线中探测音的抑制似乎会限制异频聆听。在前掩蔽调谐曲线中，异频聆听的影响更大，并且在很大程度上可能解释了一些研究中发现的非常尖锐的调谐现象。
