MICROPHONE ORIENTATION IN THE SOUND FIELD Anthony J. Schneider, B & K Instruments, Inc., Cleveland, Ohio

Many excellent papers have been published on the fundamentals of practical acoustical measure- ments, None dwell on the very important matter of microphone selection. It is erroneous to believe that all. sound level meters are identical or even equiva- lent on the basis that all are manufactured to a stated standard; their microphones differ. The selec- tion of a microphone and its orientation in the sound field is an important consideration.