听觉反射测量中的一种伪迹：一些进一步的观察

An artifact in acoustic reflex measurement: some further observations.

作者信息

Niswander P S, Ruth R A

出版信息

J Am Audiol Soc. 1976 Mar-Apr;1(5):209-14.

Abstract

This study was designed to clarify characteristics of an artifact that has been reported to be a potential source of misleading information when determing acoustic reflex thresholds elicited by low-frequency tones. The study was conducted in two parts. Experiment 1 was concerned with an investigation of acoustic interactions in a sealed cavity between the probe tone from a commercial electroacoustic impedance bridge and interfering tones of various frequencies. Experiment 2 consisted of measurements of sound pressure levels in the sealed external ear canal of the probe ear when the contralateral ear was stimulated by air-conducted pure tones. The results indicated that acoustic reflex thresholds in 250-Hz tones probably cannot be determined for most persons unless special measures are taken to prevent the artifact. The artifact should not occur when the eliciting stimulus is 500 Hz, however.

摘要

本研究旨在阐明一种伪迹的特征，据报道，在确定由低频音诱发的声反射阈值时，该伪迹可能是误导信息的潜在来源。该研究分两部分进行。实验1关注的是商用耳声阻抗桥的探测音与各种频率的干扰音在密封腔体内的声学相互作用的研究。实验2包括当对侧耳受到气导纯音刺激时，对探测耳密封外耳道内声压级的测量。结果表明，对于大多数人来说，除非采取特殊措施来防止这种伪迹，否则可能无法确定250赫兹音调的声反射阈值。然而，当诱发刺激为500赫兹时，该伪迹不应出现。