Dolan T G, Maurer J F, Dickinson L G
Portland State University, Oregon 97207.
Am Ind Hyg Assoc J. 1993 Feb;54(2):45-50. doi: 10.1080/15298669391354315.
A new procedure for determining the attenuation of earplugs with a standard audiometric headset was evaluated. The procedure utilized a device that supports a conventional supraaural earphone cushion (MX-41/AR) such that it does not contact the pinna or the earplug during threshold measurement. The attenuation provided by a foam earplug was estimated on a group of normal-hearing subjects using this method. The resulting attenuation values were compared to data obtained using sound field (ANSI S12.6-1984) methods, and to values obtained by simply placing the earphone on the pinna. Results suggest that the test re-test reliabilities of both the earphone-support method and the earphone-only method were comparable to that of the sound field procedure. Also, of the four test frequencies employed (1, 2, 3 and 4 kHz), the closet correspondence between attenuation estimates obtained using the ANSI procedures and estimates obtained with the support device occurred at 1 and 2 kHz.
评估了一种使用标准听力计头戴式耳机测定耳塞衰减的新方法。该方法使用一种装置来支撑传统的 supraaural 耳机垫（MX - 41/AR），使其在阈值测量期间不接触耳廓或耳塞。使用该方法对一组听力正常的受试者估计了泡沫耳塞提供的衰减。将所得的衰减值与使用声场（ANSI S12.6 - 1984）方法获得的数据以及仅将耳机放置在耳廓上获得的值进行比较。结果表明，耳机支撑法和仅使用耳机法的测试 - 重测可靠性与声场程序相当。此外，在所采用的四个测试频率（1、2、3 和 4 kHz）中，使用 ANSI 程序获得的衰减估计值与使用支撑装置获得的估计值之间最接近的对应关系出现在 1 和 2 kHz 处。
