Abstract: A circumaural headset includes a circumaural assembly having a physiologic sensor integrated within a generally U-shaped cuff having a formable wire frame encapsulated in a molded material and secured by a connector to an earcup of the circumaural assembly. The U-shaped cuff includes formable side portions to grip corresponding sides of a circumaural ear seal with a top portion of the cuff connecting the formable side portions and extending across a face surface of the circumaural ear seal, which is secured directly or indirectly to the earcup. The physiologic sensor is removably physically connected by a strain-relief plug of the connector to a corresponding molded socket within a faceplate of the earcup and electrically connected to one or more processors programmed to process signals from the physiologic sensor and provide an audible alert via at least one of the circumaural assemblies in response to sensor data.

Abstract: A method for quantitatively monitoring gas phase materials in a chemical process is provided and includes, providing a gaseous feed stream containing one or more reactant gases of interest; exposing the gaseous feed stream to coherent radiation from a Raman spectroscopic device; acquiring a Raman spectroscopic signal from each of the gaseous components in the feed stream; analyzing the spectroscopic signal to determine the presence and concentration of each of the gaseous components; and displaying the results of the analysis. In one embodiment, the method is useful for quantitatively monitoring gas phase materials in a process for making high purity silicon.