Instrumentation and Control News

The Vibration Division of PCB Piezotronics has announced the addition of model 130A40, a quarter-inch pressure-type microphone, to its line of acoustic products. The distinguishing feature of this surface microphone is that it is only 6.9 mm in height. It can be laid flat on its 51-mm-o.d. rubber pad or mounted by adhesive for automotive, aeronautical, and general acoustic, sound pressure level testing. The 130A40 has a sensitivity rating of 45 mV/Pa and a 20-Hz to 15-kHz frequency range (–2/+5dB). The prepolarized design of the new microphone enables savings in power supplies and cables—for polarizing the transducer—and operates from the same power required for ICP accelerometers in the same test with the same signal conditioning. PCB Piezotronics Inc, 3425 Walden Avenue, Depew, NY 14043-2495, http://www.pcb.com