Reuter Karen, Ordoñez Rodrigo, Hammershoi Dorte
Acoustics, Department of Electronic Systems, Aalborg University, Denmark.
J Acoust Soc Am. 2007 Jul;122(1):378-86. doi: 10.1121/1.2743163.
The effects of overexposure on the properties of distortion product otoacoustic emissions (DPOAEs) are investigated. In total, 39 normal-hearing humans were monaurally exposed to a 1-kHz tone lasting for 3 min at an equivalent threshold sound-pressure level of 105.5 dB. The effects of overexposure were studied in two experiments (1) on the broadband DPOAE and (2) on the DPOAE fine structure, measured using a higher frequency resolution in a narrower frequency range. The obtained DPOAE shifts were compared to temporary threshold shift (TTS) obtained after a similar exposure. Similarities between DPOAE shifts and TTS were found in the affected frequency range and the time course of recovery. The amount of TTS was higher in the early recovery time (1-4-min postexposure), but similar to the DPOAE shift (even in absolute terms) at later recovery times (5-20-min postexposure). The DPOAE fine structure was not systematically changed after the exposure.
研究了过度暴露对畸变产物耳声发射（DPOAE）特性的影响。总共39名听力正常的人单耳暴露于等效阈声压级为105.5 dB的1 kHz纯音下，持续3分钟。在两个实验中研究了过度暴露的影响：（1）对宽带DPOAE的影响；（2）对DPOAE精细结构的影响，在较窄频率范围内使用更高的频率分辨率进行测量。将获得的DPOAE偏移与类似暴露后获得的暂时性阈移（TTS）进行比较。在受影响的频率范围和恢复的时间进程中发现了DPOAE偏移与TTS之间的相似性。TTS的量在恢复早期（暴露后1 - 4分钟）较高，但在恢复后期（暴露后5 - 20分钟）与DPOAE偏移相似（甚至在绝对值上）。暴露后DPOAE精细结构没有系统性变化。
Zotero 插件