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Feb 7, 2015
What is the difference between echo and reverberation?
If we shout or clap, near a tall building or a hill, we will hear the same sound back in a little time. This is called an echo.
A sound created in a big hall will persist by repeat...
BHAGYASHRI KUDARIHAL
Jan 9, 2015
Formulas of sound chapter......
Ritik Ranjan
Mar 1, 2015
Working of human ear.
The pinna collects the sound waves from the surroundings and sends it to ear canal. The ear canal sends the sound waves to the ear drum and s...
Shriya Sanjay Patil
Mar 5, 2014
Prove that for hearing distinct echo, minimum distance of the obstacle from source of sound must be 17.2m at 22 Celsius in air [given speed of sound 344m/s].
Answer:
As the sensation of sound persists in our brain for about 0.1 s, to hear a distinct echo the time interval between the original sound and the reflected one must be at least 0.1s. If we take the speed of sound to be 344 m/s at a given temperature, say at 22 ºC in air, sound must go to the obstacle and reach back the ear of the listener on reflection after 0.1s.
Hence, the total distance covered by the sound from the point of generation to the reflecting surface and back should be at least (344 m/s) ×0.1 s = 34.4 m. Thus, for hearing distinct echoes, the minimum distance of the obstacle from the source of sound must be half of this distance. I.e., 34.4/2 = 17.2 m
[given speed of sound 344m/s]
Answer:
As the sensation of sound persists in our brain for about 0.1 s, to hear a distinct echo the time interval between the original sound and the reflected one must be at least 0.1s. If we take the speed of sound to be 344 m/s at a given temperature, say at 22 ºC in air, sound must go to the obstacle and reach back the ear of the listener on reflection after 0.1s.
Hence, the total distance covered by the sound from the point of generation to the reflecting surface and back should be at least (344 m/s) ×0.1 s = 34.4 m. Thus, for hearing distinct echoes, the minimum distance of the obstacle from the source of sound must be half of this distance. I.e., 34.4/2 = 17.2 m
[given speed of sound 344m/s]
17.2 m at room temperature and normal humidity.
Masih
Jan 16, 2015
What is the difference between intensity and loudness?
Alpha
Feb 17, 2015
A stone is dropped into a well 44.1 m deep. The sound of the splash is heard 3.13 seconds after the stone is dropped. Find the velocity of sound in air. (g = 9.8 m/s²).
Rushin Naik
Mar 1, 2015
A Stone is dropped into a well 44 meter deep and the sound of splash is heard after 3.12 sec. Find the speed of sound in air.
Adithyan Sanal
Mar 6, 2015
What is SONAR? How does it work?
Neha Sony
Nov 27, 2014
what is reverberation ?
Ipsita Saikia
Dec 7, 2010
What is the difference between Note and Tone? Does Note consist of several frequencies? Please explain how.
Raaunak
Feb 7, 2015
What is the difference between echo and reverberation?
If we shout or clap, near a tall building or a hill, we will hear the same sound back in a little time. This is called an echo.
A sound created in a big hall will persist by repeat...
BHAGYASHRI KUDARIHAL
Jan 9, 2015
Formulas of sound chapter......
Ritik Ranjan
Mar 1, 2015
Working of human ear.
The pinna collects the sound waves from the surroundings and sends it to ear canal. The ear canal sends the sound waves to the ear drum and s...
Shriya Sanjay Patil
Mar 5, 2014
Prove that for hearing distinct echo, minimum distance of the obstacle from source of sound must be 17.2m at 22 Celsius in air [given speed of sound 344m/s].
Answer:
As the sensation of sound persists in our brain for about 0.1 s, to hear a distinct echo the time interval between the original sound and the reflected one must be at least 0.1s. If we take the speed of sound to be 344 m/s at a given temperature, say at 22 ºC in air, sound must go to the obstacle and reach back the ear of the listener on reflection after 0.1s.
Hence, the total distance covered by the sound from the point of generation to the reflecting surface and back should be at least (344 m/s) ×0.1 s = 34.4 m. Thus, for hearing distinct echoes, the minimum distance of the obstacle from the source of sound must be half of this distance. I.e., 34.4/2 = 17.2 m
[given speed of sound 344m/s]
Answer:
As the sensation of sound persists in our brain for about 0.1 s, to hear a distinct echo the time interval between the original sound and the reflected one must be at least 0.1s. If we take the speed of sound to be 344 m/s at a given temperature, say at 22 ºC in air, sound must go to the obstacle and reach back the ear of the listener on reflection after 0.1s.
Hence, the total distance covered by the sound from the point of generation to the reflecting surface and back should be at least (344 m/s) ×0.1 s = 34.4 m. Thus, for hearing distinct echoes, the minimum distance of the obstacle from the source of sound must be half of this distance. I.e., 34.4/2 = 17.2 m
[given speed of sound 344m/s]
17.2 m at room temperature and normal humidity.
Masih
Jan 16, 2015
What is the difference between intensity and loudness?
Alpha
Feb 17, 2015
A stone is dropped into a well 44.1 m deep. The sound of the splash is heard 3.13 seconds after the stone is dropped. Find the velocity of sound in air. (g = 9.8 m/s²).
Rushin Naik
Mar 1, 2015
A Stone is dropped into a well 44 meter deep and the sound of splash is heard after 3.12 sec. Find the speed of sound in air.
Adithyan Sanal
Mar 6, 2015
What is SONAR? How does it work?
Neha Sony
Nov 27, 2014
what is reverberation ?
Ipsita Saikia
Dec 7, 2010