Abel S M, Alberti P W, Riko K
J Otolaryngol. 1980 Jun;9(3):256-65.
Speech perception was tested in high level noise under controlled laboratory conditions in noise-exposed workmen and normal subjects, with and without a hearing protector. The group was further divided by age and English fluency, the latter group being included because of the high proportion of non-fluent English speakers in the Canadian workforce. In normal-hearing subjects the highest discrimination scores were found without background noise, they were lower with white noise as a masker, and even lower with crowd noise as a masker; wearing of a protector had no effect on intelligibility. The results for non-fluent English speakers were parallel with these results, but the scores were lower in all test conditions. In the presence of a high frequency hearing loss speech discrimination was lower than in the normals in quiet and in noise. The addition of a hearing protector dropped their discrimination score even further. In a flat hearing loss, wearing of a protector also worsened the speech discrimination score. The results are discussed.
在可控的实验室条件下，对接触噪声的工人和正常受试者在高强度噪声环境中进行言语感知测试，测试时佩戴或不佩戴听力保护器。该组受试者进一步按年龄和英语流利程度分组，纳入英语不流利组是因为加拿大劳动力中英语不流利者比例较高。在听力正常的受试者中，无背景噪声时言语辨别得分最高，以白噪声作为掩蔽音时得分较低，以人群噪声作为掩蔽音时得分更低；佩戴保护器对清晰度没有影响。英语不流利者的测试结果与这些结果相似，但在所有测试条件下得分都更低。存在高频听力损失时，安静和噪声环境中的言语辨别能力均低于正常水平。佩戴听力保护器会使他们的辨别得分进一步降低。在平坦型听力损失情况下，佩戴保护器也会使言语辨别得分变差。对结果进行了讨论。
