掩蔽低频复合音的高频复合音线索带释放。

Release from masking of low-frequency complex tones by high-frequency complex tone cue bands.

机构信息

Medizinische Physik, Universität Oldenburg, 26111 Oldenburg, Germany.

出版信息

J Acoust Soc Am. 2012 Dec;132(6):EL450-5. doi: 10.1121/1.4766274.

Abstract

This study investigated the influence of high-frequency cue bands on the detection and discrimination of low-frequency target bands presented in a 3000-Hz low-pass noise masker. Target and cue bands were complex tones with 80-Hz spacing. The cue band consisted of 60 components starting at 4000 Hz; targets consisted of four components starting at different frequencies (500, 700, 1000, 1200, and 1500 Hz). Targets were presented with different durations within the 500-ms masker; target and cue bands had a common on- and offset. Presentation of the high-frequency complex tone significantly enhanced both the discrimination and detection thresholds by 2-3 dB.

摘要

本研究调查了高频线索频段对在 3000Hz 低通噪声掩蔽下呈现的低频目标频段的检测和辨别能力的影响。目标和线索频段均为具有 80Hz 间隔的复音。线索频段由起始频率为 4000Hz 的 60 个分量组成；目标由起始频率不同的四个分量组成（500Hz、700Hz、1000Hz、1200Hz 和 1500Hz）。在 500ms 的掩蔽器中，目标呈现不同的持续时间；目标和线索频段具有共同的开启和关闭时间。高频复音的呈现显著提高了辨别阈和检测阈 2-3dB。