The EX378B02 is equipped with a free-field microphone cartridge. It has a frequency range of 3.75 to 20,000 Hz. With the low-end noise-floor measurement capability of 15.5 dBA, it can measure accurately to 137 dB at the top end.
Source URL: PCB Piezotronics introduces Model EX378B02 prepolarized condenser microphone system
Source Website: Factory Automation – Automation.com
