0 - 50 dB microphone 47AX

50 - 100 dB100 - 150 dB10 - 15 mV/Pa

With a height (to the diaphragm) of only 8 mm, 47AX 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 22 dB to 146 dB and a frequency range from 3.15 Hz to 20 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 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 47AX. A rear-vented version is also available, the 47AX–S1. It is included with the GRAS 67AX Ground Array Set, which has a 400 mm diameter mounting plate. The 47AX 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. We offer two kinds of calibration as an optional after-sales service: GRAS Traceable Calibration and GRAS Accredited Calibration. GRAS Traceable Calibration is a traceable calibration performed by trained personnel under controlled conditions according to established procedures and standards. This is identical to the rigorous calibration that all GRAS microphones are subjected to as an integral part of our quality assurance.