28. As you move farther away from a source emitting a pure tone, the frequency o

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28. As you move farther away from a source emitting a pure tone, the frequency of the sound you hear decreases 29. Reverberation can both inhibit conversation and enhance music 30. Reverberation time of a room can be increased by covering the walls with better reflectors of sound 31. In ultrasound the wavelength of the sound is much smaller than in normal sound 32. Two uses of ultrasound are navigation by bats and controlling insects 33. A sound level of 80 dB has twenty times the amplitude of a 60 dB sound 34. A zero decibel sound level has zero amplitude 35. Combining two sounds of equal intensity will give a sound level 3 dB higher than the sound level due to just one of them 36. A sound with ten times the amplitude of another sound is judged to be ten times as loud

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True False False True False True True False True

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