Bruel & Kjaer Instruments, Inc., 63 Passaic Ave., Summit, NJ 07901
Even meeting spaces that have been designed to have excellent acoustics and low background noise can exhibit noise problems when audio-visual equipment is introduced into the room. Several common A-V equipment types were evaluated with the goal of assessing sound power, tonal content, and directivity. Results of the measurements, and predicted NC and speech interference levels are presented. Concepts for design of quiet equipment are discussed.