Bruel & Kjaer 4220

4220
The 4220 is designed for the calibration of 1'' and 1/2'' diameter microphones. An adaptor is... mehr
Produktinformationen "Bruel & Kjaer 4220"
The 4220 is designed for the calibration of 1'' and 1/2'' diameter microphones. An adaptor is placed over the opening for use with 1/2'' microphones and is removed when 1'' microphones are to be calibrated. The sound pressure level produced by the 4220 is 124 dB . However, when calibrating a microphone which is to be used for free field measurements, a small correction is necessary to compensate for the difference between free field response at 0° incidence and the pressure response. The correction is -0,4 dB for 1'' free field microphones and -0,2 dB for 1/2" free field microphones. This makes the effective calibration levels 123.6 dB and 123,8 dB respectively. No correction is required when calibrating pressure response microphones.
Produktgruppe Audio
  • CCE34F63-0FA1-4E33-832F-EC09A45471D0
 
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