TRS-RenTelco - Bruel & Kjaer 4231 Sound Calibrator for Use with All B&K Sound Level Meters

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Bruel & Kjaer - 4231 Sound Calibrator for Use with All B&K Sound Level Meters

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DESCRIPTION

SPECIFICATIONS

The Sound Level Calibrator Type 4231 is a pocket-sized, battery operated sound source for quick and direct calibration of sound level meters and other sound measuring systems. It fits Bruel & Kjaer 1" and 1/2" microphones and, with adaptors, it can be used for 1/4" microphones as well. The calibration frequency is 1000 Hz (the reference frequency for the standardized international weighting networks), so the same calibration value is obtained for all weighting networks (A, B, C, D and Linear). The calibration pressure of 94 +/- 0.2 dB re 20 uPa is equal to 1 Pa or 1N/m2. The +20 dB level step gives 114 dB SPL which is convenient for calibration in noisy environments.

Specifications

Conforms to IEC 942 Class 1 and BS 7189 Class 1
Robust pocket-size design with highly stable level and frequency
Calibration accuracy +/- 0.2 dB
94 dB or 114 dB SPL for calibration in noisy environments
Extremely small influence of static pressure
Sound pressure independent of microphone equivalent volume

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