Reinhardt-Rutland A H, Ehrenstein W H
Psychology Department, University of Ulster at Jordanstown, Newtownabbey, Northern Ireland.
Percept Mot Skills. 1996 Aug;83(1):63-6. doi: 10.2466/pms.1996.83.1.63.
Previous evidence from short monotic stimuli shows that a steady stimulus is perceived as growing louder; to be perceived as steady, the intensity of the stimulus must decrease. In the present study, 10 subjects heard a sequence of diotic tonal stimuli. Each stimulus lasted 1.5 sec. and increased, decreased, or remained steady in intensity; initial intensity was 40 dB SPL and carrier frequency was 1 kHz. Subjects made forced binary responses of "growing louder" or "growing softer" to each stimulus. Confirming the evidence from monotic stimuli, the mean value of changing intensity eliciting equal numbers of both responses was negative. Possible explanations for this growing-louder effect reside in (a) the percussive nature of many natural sounds and (b) selective responding to approaching sound-sources.
先前来自短单耳刺激的证据表明，持续的刺激会被感知为音量增大；要被感知为稳定，刺激的强度必须降低。在本研究中，10名受试者听了一系列双耳音调刺激。每个刺激持续1.5秒，强度增加、降低或保持稳定；初始强度为40 dB SPL，载波频率为1 kHz。受试者对每个刺激做出“音量增大”或“音量减小”的强制二元反应。证实了来自单耳刺激的证据，引发两种反应数量相等的强度变化的平均值为负。这种音量增大效应的可能解释在于：（a）许多自然声音的敲击性质；（b）对接近声源的选择性反应。
