ABSOLUTE CALIBRATION OF CONDENSER TRANSMITTERS 107 



nearly at a 45-degree or 60-degree angle rather than normally. In a 

 29-foot X 29-foot X 13-foot room having a reverberation time of 1 



180 



SOURCE 32.0CM. 

 FROM DIAPHRAGM CENTER 



Fig. 11 — Azimuth response of No. 394-type condenser transmitter. 



