Advertisements
Advertisements
Question
A man playing a flute is able to produce notes of different frequencies. If he closes the holes near his mouth, will the pitch of the note produced, increase or decrease? Give a reason.
Advertisements
Solution 1
When the holes near the month are closed, the effective length of air column increases so the pitch of sound decreases as the frequency of note produced is inversly proportional to the length of air column.
Solution 2
When a man playing a flute closes the holes near his mouth, the length of the vibrating air column inside the flute increases. This longer air column lowers the frequency of the sound waves, which in turn lowers the pitch of the note produced. So, when he closes the holes near his mouth, the pitch of the note will decrease. This is because pitch is directly related to the frequency of the sound waves: lower frequency results in a lower pitch, and higher frequency results in a higher pitch.
APPEARS IN
RELATED QUESTIONS
The lower the frequency of vibration, the higher is the pitch.
Name the factor that determines Quality of the note
State two conditions for an echo to take place
The time period of a wave is 2 s. Its frequency is ..........
How does the wave pattern of a loud note differ from a soft note? Draw a diagram.
State three factors on which loundess of sound heard by a listener depends.
Name musical instrument, one in each case, which produces its notes by using the following. In each case state the method used to produce notes of different pitches and loudness.
(a) A vibrating string.
(b) A vibrating column air.
(c) Vibration of any other body.
Name the subjective property of light related to its wavelength.
Name the factors which determine the quality of a note.
What is meant by the ‘loudness’ of a sound? How is it related to the intensity?
