Forrest M R
Scand Audiol Suppl. 1982;16:7-12.
In the Army, as in civil industry, there are many noise sources where the noise can not be reduced to safe levels except by use of hearing protectors, such as ear plugs, ear muffs or noise-excluding helmets. This paper shows how the effectiveness of hearing protectors can be determined for both continuous and impulse (gunfire) noise. It is shown that the results are in most cases in agreement with results for the real-ear attenuation at threshold method; the reasons for the exceptions are discussed. Hearing protection is often unpopular with users; reasons for this include discomfort, difficulty in speech communication, and incompatibility with other headgear. The degree of protection in practical usage is often much less than that measured in the laboratory. Possible solutions to these problems are described.
在军队中，如同在民用工业里一样，存在许多噪声源，若不使用听力保护器，如耳塞、耳罩或隔音头盔，噪声就无法降低到安全水平。本文展示了如何针对连续噪声和脉冲（枪声）噪声确定听力保护器的有效性。结果表明，在大多数情况下，所得结果与阈值处真耳衰减法的结果一致；文中讨论了出现例外情况的原因。听力保护装置往往不受使用者欢迎；其原因包括佩戴不适、言语交流困难以及与其他头饰不兼容。在实际使用中，保护程度往往远低于在实验室测量的程度。文中描述了针对这些问题可能的解决办法。
