Sound Calibrator - Type 4231

Sound Calibrator Type 4231 is a handy, portable sound source for calibration of sound level meters and other sound measurement equipment. The calibrator is very robust and stable.

A leather protecting case, which does not need to be removed to use the calibrator, is supplied.

Features

• Conforms to EN/IEC60942 (2003) Class LS and Class 1, and ANSI S1.40 – 1984
• Robust pocket-size design with highly stable level and frequency
• Calibration accuracy ±0.2 dB
• 94 dB SPL, or 114 dB SPL for calibration in noisy environments
• Extremely small influence of static pressure and temperature
• Sound pressure independent of microphone equivalent volume
• 1 kHz calibration frequency for correct calibration level independent of weighting networks
• Fits Brüel &Kjær 1″ and 1/2 ″microphones (1/4" and 1/8″microphones with adaptor)
• Switches off automatically when removed from the microphone