Abstract
A device for transmitting sound from a speaker in a first area, such as a sterile or clean field, to a second area such as a nonsterile or nonclean field. The device includes a sound conduit having an inlet and an outlet and being of sufficient length to permit placement of the inlet in the first area and placement of the outlet in the second area, means, such as a filter mask, for securing the inlet in an operative position relative to the speaker's mouth, and a coupler connected to the outlet. A microphone and means for adjusting the sound pressure transmitted through the conduit are preferably also provided.
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