Abel S M, Cheskes M B, Giguere C
Department of Otolaryngology, Mount Sinai Hospital, University of Toronto, Ontario, Canada.
J Otolaryngol. 1989 Aug;18(5):205-9.
The objective of this research was a determination of the role of probe tone parameters in frequency selectivity. Frequency selectivity is the ability of the auditory system to analyze a complex sound into its frequency components, and is typically evaluated by measuring the psychophysical tuning curve. Generally this entails documenting the effect of varying the center frequency of a narrowband noise masker for a given pure tone probe, 10 dB above threshold. In the present study, a new approach was taken. A family of tuning curves were generated for a series of tone probes which differed in frequency, duration and intensity, but which remained constant in energy. The results for three normal-hearing subjects indicated that the critical parameter for the shape of the tuning curve was the energy of the probe. Decreasing the energy below values generally tested resulted in aberrant shapes across subjects, which bore some resemblance to those documented in hearing-impaired listeners. Temporal summation was suggested as the unifying principle.
本研究的目的是确定探测音参数在频率选择性中的作用。频率选择性是听觉系统将复杂声音分解为其频率成分的能力，通常通过测量心理物理调谐曲线来评估。一般来说，这需要记录在给定纯音探测音（高于阈值10 dB）的情况下，改变窄带噪声掩蔽器中心频率的效果。在本研究中，采用了一种新方法。针对一系列频率、持续时间和强度不同但能量保持恒定的音调探测音，生成了一族调谐曲线。三名听力正常受试者的结果表明，调谐曲线形状的关键参数是探测音的能量。将能量降低到通常测试的值以下会导致受试者的曲线形状异常，这与听力受损听众记录的曲线形状有一些相似之处。时间总和被认为是统一的原则。
