Abstract: An improved respirator speech unit for the light-type or other model of respirator. The unit has a speech transmitter disc positioned within a frame. To the speech transmitter disc is secured a rigid valve seat disc. This valve seat disc is secured parallel to and coaxial with the transmitter disc so that, in position, it will be externally positioned in the frame. The valve seat disc is transversely seatable in the frame with its periphery cooperating with seal means in the frame to prevent passage of air between its periphery and the frame. The valve seat disc has a circular aperture for passage of exhaled air from the mask and defines, with the speech transmitter disc in position in the frame, an air passage from within the mask to this aperture.