Calibrators

Piston on a sphere calibrator

pistononaspherelow pistononaspherehigh Click to enlarge

The ‘Piston on a sphere’ calibrator consists on 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.

Datasheets

Publications

Ebook