Free Field, 0.5-in. Microphone is Externally Polarized

September 6th, 2005

The Model 377B41 is an externally-polarized, 0.5-in., free field microphone with a sensitivity of 50 mV/Pa. It has wide dynamic range (15 to 146 dB (A) re 20µPa) and a frequency range from 3.15 Hz to 20,000 Hz (+/- 2 dB). This traditional type condenser microphone has a +150 °C (+302 °F) operating temperature range, and when combined with the PCB® Model 426A30 preamplifier operates from a 200 V power supply for externally polarized microphones. This traditional-style microphone preamplifier terminates in a 7-pin LEMO style connector.

In addition to the traditional 200V models, a full line of modern, pre-polarized, condenser microphones and preamplifiers is also available. Powered by a 2 to 20 mA signal conditioner and standard coaxial cables, these modern designs allow for significant savings in power supply and cabling cost, greater ease-of-use and operate from the same power as is required for ICP accelerometers. This provides the advantage of using microphones with ICP accelerometers in the same test, with the same signal conditioning equipment, minimizing set-up time.

For additional information on this accelerometer, contact the Vibration Division of PCB Piezotronics, Inc. toll-free at (888) 684-0013 (in the U.S. and Canada); E-mail: vibration@pcb.com; or fax at (716) 685-3886. The website is at www.pcb.com.

Entry Filed under: Environmental/Durability Test