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Question & Answer Forum

Next time you have a doubt while studying, you know where to go. By simply posting your questions on Question & Answer Forum, you can have them answered by academic experts. You can also find related videos and explanations for better understanding.

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Syeda answered 1 year(s) ago

What is the difference between echo and reverberation?

1. Echo is a single reflection of a sound wave off a surface. Reverberation is the sound or the pattern created by the superposition of such echoes.

2. An echo can be heard only when the distanc...

Asked by Raaunak

Feb 7

  • 3 Answers
  • 3 Likes
  • 48450 Views
Syeda answered 1 year(s) ago

Formulas of sound chapter......

Answer.

Velocity = Wavelenght × Frequency
Velocity = Frequency × Wavelengh
Velocity = (1/Time) × Wavelengh

For Echo:

2 × Distance / Time = Speed of sound 

...

Asked by BHAGYASHRI

Jan 9

  • 2 Answers
  • 7 Likes
  • 43523 Views
Syeda answered 1 year(s) ago

Explain working of human ear.

Answer.

    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 send it to middle ear. The hammer, anvil a...

Asked by Ritik

Mar 1

  • 3 Answers
  • 4 Likes
  • 39086 Views
Syeda answered 1 year(s) ago

Minimum distance of the obstacle from source of sound for hearing distinct echo

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 t...

Asked by Shriya

Mar 5

  • 4 Answers
  • 2 Likes
  • 25249 Views
Amarnathreddy answered 4 year(s) , 4 month(s) ago

What is the difference between intensity and loudness?

Loudness vs Sound Intensity

  • Sound intensity is a property of the sound source but loudness depends on the sound source, the medium and the receiver, as well.
  • Sound intensity holds
...

Asked by Masih

Jan 16

  • 2 Answers
  • 2 Likes
  • 18573 Views
Janhavi answered 4 year(s) , 3 month(s) ago

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.

Time taken by the stone to reach the water surface  can be calculated using the equation of motion
s = ut + ½ gt 2
Here u = 0, s = 44 m , g = 9.8 m/s 2
 
...

Asked by Rushin

Mar 1

  • 2 Answers
  • 0 Like
  • 14469 Views
Janhavi answered 4 year(s) , 3 month(s) ago

What is SONAR? How does it work?

SONAR  (originally an acronym for SOund Navigation And Ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, communicate with or detect objects on or...

Asked by Adithyan

Mar 6

  • 2 Answers
  • 2 Likes
  • 13827 Views
Gaurav answered 5 year(s) , 3 month(s) ago

state 2 conditions for echo to be heard . bats cannot see still they catch their prey . explain

We can only hear echo of the original sound only in places where the reflecting objects or surfaces  are more than 17m away from the direct sound source.We can also hear  echo on the places where the materials...

Asked by Ravinder

Feb 27

  • 5 Answers
  • 2 Likes
  • 12142 Views
Janhavi answered 4 year(s) , 3 month(s) ago

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).

Time taken by the stone to reach the water surface  can be calculated using the equation of motion
s = ut + ½ gt 2
Here u = 0, s = 44.1 m , g = 9.8 m/s 2
 ...

Asked by Alpha

Feb 17

  • 1 Answer
  • 0 Like
  • 12108 Views
Amarnathreddy answered 4 year(s) , 6 month(s) ago

what is reverberation ?

Many multiple echoes of a sound can be produced are called as reverberations.
 
Reverberation is the phenomenon of overlapping of sound caused by multiple reflections ...

Asked by Neha

Nov 27

  • 1 Answer
  • 2 Likes
  • 9978 Views
Janhavi answered 4 year(s) , 4 month(s) ago

What is the time period of a tuning fork whose frequency is 200 Hz?

Time period = 1/Frequency
T = 1/f
    = 1/(200 Hz) = 0.005 s

Asked by Srishti Pant

Jan 26

  • 1 Answer
  • 1 Like
  • 8068 Views
Janhavi answered 4 year(s) , 9 month(s) ago

Note and Tone

A sound of single frequency is called a tone. A sound that is produced when several frequencies are mixed is called a note. For example a musical note has tones of various frequencies (sounds of different pitch...

Asked by Ipsita

Dec 7

  • 1 Answer
  • 0 Like
  • 7630 Views
Janhavi answered 4 year(s) , 3 month(s) ago

Suppose you and your friend are on the moon .Will you be abe to hear any sound produced by your friend ? How are wavelength and frequency of a sound wave related to its speed ? Which wave property determines a) loudness b) pitch

No, we cannot hear any sound on the Moon because Moon does not have an atmosphere and sound needs a medium for propagation. 

speed of sound = wavelength x frequency
v = nλ
...

Asked by Shreyas

Feb 18

  • 1 Answer
  • 1 Like
  • 6324 Views
Janhavi answered 4 year(s) , 4 month(s) ago

Define echo.

The repetition of the sound, which is reflected from a high building or any such surface is called an echo. An echo can be heard only when the distance between the source of sound and the reflecting body is  at...

Asked by Jeetu

Jan 14

  • 1 Answer
  • 0 Like
  • 6248 Views
Janhavi answered 4 year(s) , 3 month(s) ago

In which medium sound travels fastest: air or hydrogen & why?

The speed of sound depends on the elasticity and density of the medium through which it is traveling. Air and hydrogen have nearly the same elastic properties, but the density of hydrogen is less than that of a...

Asked by Alpha

Feb 15

  • 2 Answers
  • 0 Like
  • 4689 Views
Amarnathreddy answered 5 year(s) , 7 month(s) ago

Difference between Echo and Reverberation

What is the difference between Echo and Reverberation  
Answer: echo is the reflection of sound whereas the reverberation is the multiple reflection of the sound.

Asked by Arkaprabha

Nov 9

  • 1 Answer
  • 0 Like
  • 4338 Views
Janhavi answered 4 year(s) , 3 month(s) ago

The sound of an explosion on the surface of a lake is heard by a man 150m away and by a driver 150m below the point of explosion. Answer th..

(a) The diver under the water will hear the sound of explosion first, as sound travels faster in water than in air.

(b) t = distance/speed = 150 m/(344 m/s) = 0.436 s

t' = 150/15...

Asked by Prashoon

Mar 2

  • 1 Answer
  • 1 Like
  • 4303 Views
Janhavi answered 4 year(s) , 5 month(s) ago

The frequency range of human ear is 20 Hz – 20000 Hz. Express the range in terms of time period.

Time period = 1/frequency

T 1 = 1/f 1 = 1/(20 Hz) = 0.05 s
T 2 = 1/f 2 = 1/(20,000 Hz) = 0.00005 s

The range in terms of t...

Asked by Yukti

Jan 5

  • 1 Answer
  • 0 Like
  • 4244 Views
Purav answered 4 year(s) , 4 month(s) ago

why sound waves are called mechanical waves ?

Sound waves are known as mechanical waves because they require a material medium for their propagation.

Asked by Ravinder

Mar 10

  • 6 Answers
  • 1 Like
  • 3640 Views
Purav answered 4 year(s) , 4 month(s) ago

what is difference between longitudinal wave and transversal wave

In transverse waves, the particles of the wave vibrate in the direction perpendicular to the direction of propagation.

In longitudinal waves, the particles vibrate along the direction of propaga...

Asked by Mithalesh

Feb 23

  • 5 Answers
  • 0 Like
  • 3262 Views
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