1. What would be the ASPL of a sound if you moved from a distance of 5 meters to a point that is 0.3 meters from the source? 2. An SPL = 82 dB is measured at a distance of 2.5 meters from a sound source. What would the SPL be if it were measured 15 meters from the source? 3. An SPL=61 dB is measured at a distance of 50 meters from a sound source. What would the SPL be if it were measured 2 meters from the source?
4. An SPL = 100 dB is measured at a distance of 8 cm from a sound source. What would the SPL be if it were measured at each of the distances (from the source) given in the table below? Show your work for one of the distances. Distance (cm) 1.0 1.5 2.0 3.0 4.0 6.0 8.0 16.0 30.0 32.0 64.0 100.0 dB 100 5. a. Three independent sound sources are located at exactly 2 cm from a sound level meter. By them- selves, the sources produce SPL's of 82 dB, 85 dB, and 79 dB. What SPL would be measured when all three sources are "on" at the same time? b. Assuming that the three sources remain "on," what SPL would be measured at a distance of 60 cm away from them. (You can start with your answer to part (a).)
6. a. Ten chirping birds sitting next to each other on a fence each produce an SPL of 72 dB measured at a distance of 5 meters. What is their combined SPL? b. What would be the combined SPL of the ten birds (above) if the measurement location was 16 meters from the source?