Abstract
As part of an over-all evaluation of the USNEL Flight Deck Communications System, an RCA modulated air-flow loudspeaker (air speaker) was tried out as a speech and alarm signaling transducer on the flight deck of an aircraft carrier. Tests with 200- to 6000-cps noise showed that the air speaker produced 130 db SPL at optimum points on the deck, as compared to 110 db for the present system. Speech intelligibility and alarm detection tests showed the air speaker to be usable with jet aircraft at idle (30%) power while the present loudspeakers could not be heard. Neither loudspeaker system was adequate with jets at full power.
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