BSWATECH Beijing Reputation MP471S 1/4-inch pressure field microphone pre-polarized microphone-pressure field and diffusion field

product description: MP471S is a 1/4-inch pressure field microphone developed for Reputation. It is suitable for pressure field environments such as in a cavity, near a hard reflective surface, or installed flush with a hard surface. It adopts a pre-polarization method without the need for external polarization voltage. , suitable for ICCP powered MA401 preamplifier (optional TEDS). MP471S uses the side pressure equalization method. The pressure equalization hole located in the protective cover is suitable for measuring noise in a cavity where the static pressure is easy to However, the side pressure equalization method also causes the frequency response of the microphone to Its frequency range is 8 Hz ~ 20 kHz. After relaxing the frequency response limit, the high frequency can be extended to 40 kHz. MP471S uses a high-strength nickel metal diaphragm. By increasing the tension of the diaphragm, it increases the maximum sound pressure level of the microphone, while reducing the sensitivity to about 0.5mV/Pa. It also avoids the ICCP preamplifier from limiting the maximum output voltage of the microphone, and can measure up to 170dB sound pressure level. Each MP471S undergoes high sound pressure testing before leaving the factory to verify that its total distortion is ≤3% when reaching the rated maximum sound pressure level. MP471S can choose a preamplifier with TEDS, which allows data acquisition equipment to directly read microphone information, inc microphone model, serial number, sensitivity, etc. Currently, Reputation's TEDS microphones support the IEEE 1451.4 standard, of which the v0.9 version is used by default to be compatible with more data acquisition equipment. The v1.0 version can also be selected according to user requirements. Every MP471S comes with an independent calibration data chart before leaving the factory, inc information such as sensitivity and frequency response. Features: 1/4 inch pressure field microphone Sensitivity Hz): 0.5 mV/Pa (±3 dB) Frequency range: 8 Hz ~ 20 kHz (±2 dB) 6 Hz ~ 40 kHz (-3 dB / +7 dB) Dynamic range: 56 dBA ~ 170 dB Polarization method: pre-polarization Pressure equalization method: Side pressure equalization Suitable for 1/4-inch ICCP powered preamplifier Optional TEDS (IEEE 1451.4) Application scope: Measurement of high sound pressure such as artillery and automatic weapons, aircraft engines and rocket engine noise High frequency noise measurement