Sound intensity calibrator
Type 4297
Bruel and Kjaer
Its most important and unique feature is that there is no need to dismantle the sound-intensity probe for calibration.
The calibrator is optimised for use with 2260 E Investigator™ sound intensity system for phase enhancement, but it can also be used with sound intensity analysis systems based on PULSE™.
Type 4297 is a complete sound-intensity calibrator in one compact, portable unit with built-in sound sources. The acoustic feedback system automatically adjusts for variations in atmospheric pressure and fulfils the IEC 61043 standard.
Sound Intensity Calibrator Type 4297 enables instruments which measure sound intensity to be accurately calibrated.
Type 4297 is intended for use with Brüel & Kjær Sound Intensity Probes Types 3583, 3584 and 3595 (or earlier Types 3545 or 3548) with Sound Intensity Microphone Pair Type 4197 (or earlier Type 4181). The microphones must be used with ¼" preamplifiers.
The Sound Intensity Calibrator can be used for calibration of sound-pressure sensitivity. To do this, the microphones are both positioned in the calibration chamber. There is no need to dismantle the probe, and both microphones are exposed to exactly the same sound pressure (amplitude and phase).
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