Communications headsets have been in use for many decades in countless applications. The recent attention of industrial nations to hazardous occupational noise exposure has caused a noticeable increase in the use of noise-attenuating headsets which allow two-way voice communication while providing significant reduction of ambient noise. To use this type of headset in communications systems, applications engineers must have a working knowledge of their real-ear/real-voice electroacoustic properties with respect to attenuation, receiving sensitivity, and microphone output. Typical values of the above parameters are shown, including application of attenuation data to control noise exposure. Typical input/output requirements of intercommunication systems are discussed when using noise-attenuating headsets with noise-canceling boom microphones.
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