How much time is required for the transducer to emit 4890J of sound energy? 11. [2pt] A recording engineer works in a soundproofed room 1. [2pt] A person lying on an air mattress in the ocean rises and that is 44.8dB quieter than the outside. If the sound intensity falls through one complete cycle every 5.50 seconds. The crests in the room is 1.121010W/m2 , what is the intensity outside?