Abstracts of Technical Articles by Bell System Authors (01 July 1948)

J. R. E., February 1948. I. R. E., February 1948. Proc. I. R. E., February 1948. Proc. I. R.E., March 1948. 589 590 HELL SYSTEM TECHNICAL JOURNAL method for predicting the loudness established by loudspeakers in enclosures. A loudness-efficiency rating for loudspeakers is suggested, and its application to sound-system engineering problems is described. .1 Sheet of Air Bubbles as an Acoustic Screen for Underwater Noise} DONALD P . LOYE* a n d W M . FRED ARXDT.