Abstract: A sample transport, sample introduction, and flame excitation system for spectrometric analysis of high temperature gas streams which eliminates degradation of the sample stream by condensation losses.

Abstract: A personal audio listening system to be worn by an individual listener is disclosed and includes a pair of speakers mounted within a flexible supporting body which surrounds the back and side portions of the listener's neck. The supporting body may include portions which extend generally forward from both sides of the listener's neck and may be joined by a safety releasable fastener to form a closed loop around the listener's neck. The supporting body includes acoustical and safety padding, speaker grills for protecting the speaker cones and the necessary electrical connections for coupling to an audio signal source. The audio signal source may be external to the supporting body or may be enclosed within the supporting body.