Advertisements
Advertisements
Question
Give a scientific reason.
We can hear the movement of a mosquito’s wings but we cannot hear the movement of our hands.
Advertisements
Solution
The frequency of the sound produced by the movement of a mosquito’s wings lies within the human audible range (20 Hz to 20,000 Hz), whereas the sound produced by the movement of our hands has a frequency below 20 Hz, which is inaudible to humans. Therefore, we can hear the movement of a mosquito's wings but not that of our hands.
RELATED QUESTIONS
The pitch of a stringed instrument is increased by .................. tension in string.
Explain the mechanism of the formation of a longitudinal wave when the source vibrates in the air.
Define the following term:
Frequency
Name three characteristics of a musical sound.
If the amplitude of a wave is doubled, what will be the effect on its loudness?
Explain the following and illustrate your answer by drawing appropriate diagram:
Frequency
Explain the following and illustrate your answer by drawing appropriate diagram:
Pitch
Give scientific reason for the following:
Windows sometimes rattle when the low notes of a pipe organ are sounded.
Three musical instruments give out notes at the frequencies listed below. Flute: 400 Hz; Guitar: 200 Hz; Trumpet: 500 Hz. Which one of these has the highest pitch?
Draw a diagram to show the waveforms of a pure note and a musical note, of the same pitch and same loudness.
