50 - 100 dB microphone 47BX

100 - 150 dB150 - 200 dB0 - 5 mV/Pa

Flush mounting in confined spaces Flush mounting in clay models Flush mounting in scale models for wind tunnel tests Ground array measurements General noise measurements Design With a height (to the diaphragm) of only 8 mm, 47BX is suitably designed for flush mounting in plates in ground array applications and other applications with size constraints. The microphone is a prepolarized pressure microphone with a dynamic range from 44 dB to 165 dB and a frequency range from 4 Hz to 70 kHz. The built-in preamplifier is a low noise constant current power (CCP) type, with a built-in TEDS circuit for automatic transducer identification. The set has an integrated 1.5 m cable (GRAS 47BX-CL with customized length optional) with Microdot connector plus an adapter for BNC cable. Flush-mounting is ideal where holes can be made in the structure, such as a clay model, to accommodate the front-vented 47BX. A rear-vented version is also available, the 47BX-S1 The 47BX is based on the IEC 61094 standard for measurement microphones. Calibration When leaving the factory, all GRAS microphones have been calibrated in a controlled laboratory environment using traceable calibration equipment. Depending on the use, measurement environment and internal quality control programs we recommend that the microphone is recalibrated at least once a year.