Two identical sound producers will sound twice as loud as just one.
a. True
b. False
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[Ques. 2] A sound with ten times the amplitude of another sound is judged to be ten times as loud.
a. True
b. False
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[Ques. 3] Combining two sounds of equal intensity will give a sound level 3 dB higher than the sound level due to just one of them.
a. True
b. False
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[Ques. 4] A zero decibel sound level has zero amplitude.
a. True
b. False
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[Ques. 5] A sound level of 80 dB has twenty times the amplitude of a 60 dB sound.
a. True
b. False
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[Ques. 6] Two uses of ultrasound are navigation by bats and controlling insects.
a. True
b. False
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[Ques. 7] In ultrasound the wavelength of the sound is much smaller than in normal sound.
a. True
b. False
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[Ques. 8] Reverberation time of a room can be increased by covering the walls with better reflectors of sound.
a. True
b. False
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[Ques. 9] Reverberation can both inhibit conversation and enhance music.
a. True
b. False
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[Ques. 10] As you move farther away from a source emitting a pure tone, the frequency of the sound you hear decreases.
a. True
b. False
Indicate whether the statement is true or false
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