Featuring stainless steel grid cap and replaceable water- and dust-resistant cover, ½ in. Model 130A24 is suited for applications where moisture, oil splash, and contamination are present. Free-field, prepolarized microphone and preamplifier system has wide dynamic range from 30 dBA (inherent noise level) to 150 dB. Phase characteristics are tailored for noise source location applications such as holography, beamforming, acoustic cameras, and sound pressure mapping.