8. SOUND
INTENSITY PROBE (ANSI S12.12)
The sound
intensity probe essentially consists of a two 12 mm diameter microphone
holder with a center distance of 15 mm. The microphone holder is perfectly
machined to fine tolerances in the local shops. This is a very inexpensive
substitute to the conventional imported probes, which are very costly.
The microphone pair is amplitude and phase calibrated in the plane wave
impedance tube for sound intensity measurements. The sound intensity thus
measured can be used to calculate the radiated sound power as per the
ANSI 12.12 standard
