Advertisements
Advertisements
प्रश्न
What is meant by the ‘loudness’ of a sound? How is it related to the intensity?
Advertisements
उत्तर
Loudness is an aural sensation, i.e., a physiological rather than a physical phenomenon. It increases with intensity but the relation between the two is not linear, i.e., the ear does not recognize a sound, having twice the intensity of another, as twice as loud. In fact loudness (L) of a sound and its intensity (I) are related as L = k log (I/I0). Here I/I0 is the intensity level of the sound or the ratio between its intensity I and the zero of intensity or the threshold intensity I0 and k, a constant of proportionality depending upon the unit chosen.
संबंधित प्रश्न
A tuning fork produces sound of ................... frequency.
Explain the mechanism of the formation of a longitudinal wave when the source vibrates in the air.
Two musical notes of the same pitch and same loudness are played on two different instruments. Their wave patterns are as shown in figure.
How do they differ in
(a) loudness,
(b) pitch and
(c) quality
Figure shows four waves A, B, C, and D
Name the wave which shows
(a) a note from a musical instrument,
(b) a soft note
(c) a shrill note.
Two waves have frequencies 256 Hz and 512 Hz, but same amplitude. Compare their (i) loudness, and (ii) pitch
What determines the pitch of a sound?
The same musical note when played on a piano and when played on a flute sounds different.
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?
The frequency of the stretched string of a fixed length is f when it is plucked in the middle. Where should it be plucked so that string vibrates with frequency (i) 2f, (ii) 3f?
Draw diagrams to show these vibrations and name them.
