复合护耳器通话及防护效果的研究

Study on Effects of Combined Hearing Protector on Communication Quality and Noise Protection.

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。

To study the communication quality and the protection effects of single protector and the combined ones, sound attenuation experiments and the communication experiments were conducted in 14 male subjects.The results showed that the sound attenuation of combined prtecotors were 13dB or 6dB more than that of single earplug or earmuff respectively,and combined protectors could avoid sound attenuation caused by the harmonics on some frequency bands in single one. After combined usage,the single protector reduced the distrotion which came from the overload of hearing organs and maintained the communication quality. The combined protector is an effective hearing protection device in high noise environment in aerospace field.