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Unformatted text preview: c. 58 dB SPL and 62 dB SPL d. 66 dB SPL and 67 dB SPL e. Four machines each producing 80 dB SPL f. Fifteen machines each producing 70 dB SPL. g. Forty machines each producing 90 dB SPL. 4.11. When four Air Force Thunderbird F-16s take off together in tight formation, the noise for the Air Show spectators is deafening, about 115 dB SPL. If a solo F-16 takes off, what is the predicted noise level for the spectators? 4.12. Within 1 dB, what is the total SPL produced by the sum of the following sound sources? Source 1: 80 dB SPL Source 2: 77 dB SPL Source 3. 77 dB SPL Source 4. 83 dB SPL Hint: See if you can figure it out by just looking at it, then do the calculations....
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- Fall '11