A sound wave is __________________________
A) a variation in air pressure at a point in the range 20 Hz to 20 kHz.
B) an audio signal
C) an electromagnetic wave in the air
D) a vibration of atoms
Correct Answer:
Verified
Q2: Sound pressure drops _ dB each time
Q3: Loud sounds have _.
A) high frequencies
B) low
Q4: One thousand cycles per second is abbreviated
Q5: A high-pitched sound has a _.
A) high
Q6: If you combine two identical waves 180
Q7: A complex wave is made of _.
A)
Q8: Noise (in audio) is _.
A) Undesired sound
B)
Q9: The four parts of an envelope are
Q10: Sounds with short envelopes _.
A) have quick
Q11: The speed of sound is _.
A) about
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