Bruel and Kjaer 4231

Bruel and Kjaer 4231

Sound Level Calibrator

The Bruel & Kjaer 4231 is one of our refurbished Sound Level Calibrators.

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Refurbished

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A handy, portable sound source for calibration of sound level meters and other sound measurement equipment. The calibrator is very robust and stable, and conforms to EN/IEC 60942 Class LS and Class 1, and ANSI S1.40-1984.

For maximum confidence in your measurement results you can quickly compensate for local measurement conditions by calibrating before every measurement. Twin sound pressure levels guarantee definitive checks even in noisy environments, and ensure linearity in your microphones.

Bruel & Kjaer 4231 Features:

  • Calibration of sound level meters and other sound measurement equipment
  • Conforms to EN/IEC 60942 (2003) Class LS and Class 1, and ANSI S1.40 – 1984
  • Robust, pocket-sized 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