REAL EAR ATTENUATION AT THRESHOLD FOR 3 AUDIOMETRIC HEADPHONE DEVICES - IMPLICATIONS FOR MAXIMUM PERMISSIBLE AMBIENT NOISE-LEVEL STANDARDS
REAL EAR ATTENUATION AT THRESHOLD FOR 3 AUDIOMETRIC HEADPHONE DEVICES - IMPLICATIONS FOR MAXIMUM PERMISSIBLE AMBIENT NOISE-LEVEL STANDARDS
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DOI：
10.1097/00003446-199202000-00004
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发表时间：
1992-02-01
期刊：
影响因子：
3.7
通讯作者：
THEMANN, CL
中科院分区：
文献类型：
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作者：
FRANKS, JR;ENGEL, DP;THEMANN, CL
使用ANSI S12.6-1984协议在具有TDH-50 P耳机和Model 51缓冲垫、Amplivox Audiocups耳机外壳和Peltor AudioMate耳机外壳的标准Telephonics耳机上进行衰减测量。 每个外壳都装有Telephonics TDH-50 P耳机和Model 51缓冲垫。 将获得的平均衰减值与先前报道的值进行比较，并分析差异的原因。 根据每个耳机设备的衰减值，估计了符合ANSI S3.1-1977和职业安全与健康管理局（1983）最大允许环境噪声水平标准的背景噪声中的纯音阈值偏移，并考虑了这些当前标准对准确纯音阈值评估的适用性。 结果表明，单独使用51型缓冲垫不足以衰减ANSI S3.1-1977所允许的环境噪声级，即使使用不含噪声的耳机外壳，也不能将职业安全与健康管理局（1983）所允许的背景噪声级降低到足以使测试降至0 dB HL的程度。
Attenation measurements were made using the ANSI S12.6-1984 protocol on a standard Telephonics headset with TDH-50P earphones and Model 51 cushions, Amplivox Audiocups headphone enclosures, and Peltor AudioMate headphone enclosures. Each of the enclosures housed Telephonics TDH-50P earphones with Model 51 cushions. The mean attenuation values obtained were compared with those previously reported, and reasons for discrepancies were analyzed. Pure-tone threshold shifts in background noise complying with ANSI S3.1-1977 and Occupational Safety and Health Administration (1983) maximum permissible ambient noise level standards were estimated on the basis of the attenuation values for each headphone device, and the adequacy of these current standards for accurate pure-tone threshold assessment was considered. The results indicated that Model 51 cushions alone are insufficient to attenuate the ambient noise levels permitted under ANSI S3.1-1977, and even the utilizaion of noise-eexcluding headphone enclosures does not reduce the background noise levels permitted under the Occupational Safety and Health Administration (1983) to a sufficient degree to permitt testing down to 0 dB HL.