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Assignment help 4628

Do the following problems on paper. Scan or photograph your work and submit.

1.     If one loudspeaker produces a sound pressure level of 78 dB at a distance of 3 m, and another produces a level of 82 dB at the same distance, what would be the total sound pressure level from both? Please use the equation for this problem, not the shortcut.

2.     If one trombone produces a sound pressure level of 55 dB at a distance of 5 m, how much sound pressure level would be expected from 76 trombones?

3.     Calculate both the linear (unweighted) and A-weighted total sound pressure levels for the following octave-band data:

31.5 Hz

63 Hz

125 Hz

250 Hz

500 Hz

1 kHz

2 kHz

4 kHz

8 kHz

78 dB

67 dB

65 dB

56 dB

48 dB

40 dB

37 dB

36 dB

25 dB

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