Abstract: A Horn Performance Stand has a tripod (1) on which is mounted a support block (3) on which is mounted a foam tubing cylinder (6). The foam cylinder is cut to accept and support a brass musical instrument to minimize pressure on the lips while performing.

Abstract: A digital stethoscope has an earpiece microphone (4) connected acoustically with flexible tubing to a Precordial Hockey-Puck sensor (1) and connected electronically to a Pro-audio Computer (8) with real-time software to display, control monitoring and record vital signs of a patient undergoing medical procedures. The patient is acoustically isolated from the computer. The user interface can select or de-select optional functional real-time code blocks.

Abstract: A Printed Circuit Assembly has a multiplicity of connectors with each connector containing insulating matrices with each matrix containing a multiplicity of conducting or non-conducting standoffs with each standoff contacting one or more printed circuit boards. The standoffs permit controlled-impedance electrical connections, thermal management and mechanical rigidity of the overall assembly making the assembly suitable for use in any environment including the most harsh extremes.