Calibrators

Calibrators

 

Piston on a Sphere Calibrator

The ‘Piston on a sphere’ calibrator consists of a sound source with a known acoustic impedance in front of the loudspeaker. The impedance is modeled as a ‘piston on a sphere’ and the loudspeaker acts as a piston. The set up is used to calibrate all probe types in the full acoustic bandwidth. A reference pressure microphone can be mounted airtight -due to rubber rings at the holes- to calibrate at lower frequencies. It is also possible to mount the reference pressure microphone in front of the loudspeaker to calibrate at higher frequencies. The low frequency method covers a bandwidth of 10Hz – 400Hz and the high frequency method 300Hz - 20kHz...Download brochure

Standing Wave Tube Calibrator

The standing wave tube is used to calibrate Microflown probes using the sound field just before the end of the tube. The method is usable in a 20Hz-3.5kHz bandwidth. The relationship of the particle velocity and the reference sound pressure at the end of the tube relates to simple sine function. The phase shift between them equals plus or minus 90 degrees ...Request information

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