Sound Level Calibrator ND9A ND9B

Sound Level Calibrator ND9A ND9B Applications: For quick and easy calibration of sound level meters and sound measuring systems. Features: * Handy sound source for quick and easy calibration of sound level meters and sound measuring systems. * The Calibrator employs solid state integrated circuitry that provides accurate and stable performance. * Sensitivity calibration of microphones. * Suitable for field and laboratory use. Details: Model ND9A ND9B Standards GB/T15173,ANSI