196 



MICROPHONES 



3.0 



23 



2.0 



Q. 

 •I- 



8'-S 



2 3 4 5 6 76S 



2 3 -456789 



Fig. 9.14. Computed pressure frequency characteristic, at the center, on the front and the 

 back of a circular baffle for normal incidence of the impinging sound wave. 



1.0 



2 3 4 5 6 7 as 



2 3 456769 



Fig. 9.15. Measured pressure frequency characteristic at the center, on the front and the 

 back of a circular baffle for normal incidence of the impinging sound wave. 



