噪声暴露的栗鼠中的远程掩蔽

Remote masking in noise-exposed chinchillas.

作者信息

Quaranta A, McFadden S L, Henderson D, Sallustio V

机构信息

ENT Department, University of Bari, Italy.

出版信息

Acta Otolaryngol. 1997 Mar;117(2):226-8. doi: 10.3109/00016489709117776.

DOI:10.3109/00016489709117776

PMID:9105455

Abstract

Remote masking (RM), the phenomenon whereby an intense high-frequency masker elevates thresholds for low-frequency signals, has been shown to be sensitive to various types of hearing loss in humans and to temporary threshold shifts in chinchillas. In this experiment, RM was evaluated in chinchillas with permanent threshold shift (PTS). Thresholds for 0.5 and 1 kHz tones were measured in quiet and in the presence of an 88 dB SPL narrow band noise centered at 3 kHz in the animals exposed for 30 h to impact noise at 125 dB SPL as intensity. The results show that RM values are significantly lower in chinchillas with PTS than in normal hearing chinchillas.

摘要

远程掩蔽（RM）是指高强度高频掩蔽声提高低频信号阈值的现象，已被证明对人类的各种听力损失以及龙猫的暂时性阈移敏感。在本实验中，对患有永久性阈移（PTS）的龙猫进行了RM评估。在以125 dB SPL的强度暴露于冲击噪声30小时的动物中，测量了0.5 kHz和1 kHz纯音在安静环境下以及存在以3 kHz为中心、声压级为88 dB SPL的窄带噪声时的阈值。结果表明，患有PTS的龙猫的RM值显著低于正常听力的龙猫。