7. Which of the following is TRUE about low frequency sound?



a.low pitch and long-wavelength

b.low pitch and short-wavelength

c.high pitch and long-wavelength

d.high pitch and short-wavelength


8. A person produces two sound waves with a flute, one immediately after the other. Both sound waves have the same pitch, but the second one is louder. Which of the following properties is greater for the second sound wave?



amplitude

frequency

quality

speed

9. We can easily distinguish between the sounds of the different singers even without having seen them. This is all due to the different quality or timber of their sounds. On what factor does the quality of sound depend?



waveform

wavelength

wave amplitude

wave frequency



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