Advertisements
Advertisements
प्रश्न
The human ear can detect continuous sounds in the frequency range from 20 Hz to 20,000 Hz. Assuming that the speed of sound in air is 330 ms1 for all frequencies; calculate the wavelengths corresponding to the given extreme frequencies of the audible range
Advertisements
उत्तर
Audible range of hearing for a normal human ear is 20 Hz to 20,000 Hz.
Speed of sound in air, v = 330 ms-1
Speed, wavelength and frequency are related as
v = nλ
`:. lambda = v/n`
nlower = 20 Hz
nupper = 20,000 Hz
`:. lambda_"lower" = v/(n_"lower")`
`:.lambda_"lower" = 330/20 = 16.5 m`
Similary `lambda_"upper" = v/n_"upper"`
`:. lambda_"upper" = 330/20000` = 0.0165 m = 16.5 mm
APPEARS IN
संबंधित प्रश्न
What is a megaphone ? Name the principle on which a megaphone works.
A cork piece is floating on the surface of the water in a pond. A piece of pebble is dropped into the water. What will be your observation?
Why is an echo not heard when the distance between the source of sound and reflection body is less than 10 m?
A sound wavelength of 0.332 m has a time period of 10−3 s. If the time period is decreased to 10−4 s, calculate the wavelength and frequency of the new wave.
Explain Reflection at curved surfaces.
The direction of the incident sound, the direction of reflected sound, and the normal are in different Planes.
