A) higher frequency |
B) higher amplitude |
C) lower frequency |
D) weak vocal chords |
A) higher frequency |
1). The loudness of a sound wave is determined by its
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2). Sound travels at maximum speed in
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3). Sounds cannot travel through
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4). The speed of sound will be highest in
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5). Thunder is heard much after a flash of lightning is seen because
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6). Mach number is used in connection with the speed of
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7). Echoes are produced due to
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8). A clearly separate echo of a sound is heard when the minimum distance of the4 reflecting surface from the source of sound is
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9). The walls and ceiling of an auditorium are covered with fibrous material, such as glass fibre, to
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10). Bats can fly in the dark because
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