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Prepolarized microphone cartridge freefield (with built in ICP microphone preamplifier) is similar to an accelerometer. The microphone is powered by a CSI analyzer, and is a free-field microphone designed to measure the sound pressure as it existed before the microphone was introduced into the sound field. At higher frequencies, the presence of the microphone itself in the sound field will change the sound pressure on the diaphragm due to reflections and diffraction. The free-field microphone is designed so that its frequency response characteristics compensate for this effect. When acquiring a measurement, the free-field microphone should always be pointed towards the source. This microphone is an extremely cost-effective method for single- or multi-channel sound pressure measurements. Benefits include: Documentation of sound levels for safety requirements. Location of noise sources Vibro-Acoustical analysis. Technical Specifications: 25 mV/PA 10-15000Hz (+/-2dB) 130dBspl upper limit, optional components: 611 or 625 adapter for attaching the BNC cable to a CSI vibration analyzer, recommend: A0344CA microphone calibrator to compensate for day to day changes in temperature and humidity.
