NC-72B Pistonphone

Rion NC-72B Pistonphone

A standard Sound source that Generates a constant sound pressure of 114 dB at 250Hz

Supports exact frequencies (251.19 Hz)
Allows calibration with precision of ±0.10 dB
Can also be powered by NiMH batteries
Usable as a standard sound source in laboratories or as a calibration sound source for sound level meters on site.