The 4220 is vibration and sound equipment from Bruel & Kjaer.
Additional Features:
Well defined sound source
High calibration level: 124 dB SPL at microphone diaphragm
Accurate calibration within +/- 0,2 dB
Transistorized frequency control
Individually calibrated
Battery Operated
Fits 1", 1/2", 1/4" and 1/8" microphones
The Bruel & Kjaer 4220 is a Pistonphone that is a compact battery operated precision sound source. It is designed to enable quick and accurate overall calibration of sound measuring equipment. It provides a sound pressure level of 124 dB at a frequency of 250 Hz.
The 4220 is vibration and sound equipment from Bruel & Kjaer.
Additional Features:
- Well defined sound source
- High calibration level: 124 dB SPL at microphone diaphragm
- Accurate calibration within +/- 0,2 dB
- Transistorized frequency control
- Individually calibrated
- Battery Operated
- Fits 1", 1/2", 1/4" and 1/8" microphones
The Bruel & Kjaer 4220 is a Pistonphone that is a compact battery operated precision sound source. It is designed to enable quick and accurate overall calibration of sound measuring equipment. It provides a sound pressure level of 124 dB at a frequency of 250 Hz.
