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为了研究单一护耳器和复合护耳器通话及防护效果，对１４名男性被试者，分别进行了声衰减性能和通话效果实验。结果表明，单一护耳器经复合使用后，其声衰减值比单一的耳塞、耳罩分别高出１３和６ｄＢ，并且还可克服单一护耳器在某些频率上出现的谐振点所造成声衰减性能降低的缺陷。单一护耳器经复合使用后，克服了听觉器官过载造成的畸变，基本上保持了原有的通话质量，复合护耳器是航空航天噪声环境中的有效耳防护设备。
In order to study the effect of single ear protector and compound ear protectors on hearing and protection, 14 male subjects were tested for sound attenuation performance and communication effect respectively. The results show that the single ear protector, when used in combination, has a sound attenuation value that is 13 and 6 dB higher than a single ear and ear muff, respectively, and can overcome the sound attenuation performance caused by the resonance point of a single ear protector at certain frequencies Decreased defects. After being used in combination, the single ear protector overcomes the distortion caused by overload of auditory organs and basically maintains the original call quality. The composite ear protector is an effective ear protector in the aerospace noise environment.