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You hear the echo as if from a longer distance; the sound energy gets dispersed over a larger area. Part of the energy will also be absorbed in the wall or whatever reflects the sound.
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What is an echo also why is it weaker than the original sound?
Sound is a vibration of molecules that can travel through the air. It bounces off solid objects, so that the sound returns to its source in the form of an echo. The echo is weaker than the original sound because the vibration travels in many directions, not just to the object that it bounces off of, so energy is lost that way, and more energy is lost by means of other inefficiencies in the system; even at the moment of reflection, some energy is absorbed into the same object which reflects the sound.
Why is the intensity of an echo less than that of the original sound?
Because the sound must lose energy on its way back from the reflector.
How do bats use the Doppler effect?
A bat can tell how big an insect is based on the intensity of the echo. A smaller object will reflect less of the sound wave, and so will produce a less intense echo.The­ bat can sense in which direction the insect is moving based on the pitch of the echo. If the insect is moving away from the bat, the returning echo will have a lower pitch than the original sound, while the echo from an insect moving toward the bat will have a higher pitch. This difference is due to the Doppler effect
What things have to happen in order for an echo to happen?
For an echo to occur, sound must be reflected off a hard surface. Additionally, the reflected sound must reach the human ear more than 1/15 of a second after the original sound or the reflected sound will not be able to be distinguished from the original. A true echo is only reflected once.
Why does an echo occur?
Sound waves reflect from objects. This is the echo. But a smooth surface and distance is required for this to occur. Sound moves at 343 meters per second in dry air at 20 degrees so if you make a sound and hear an echo 3 seconds afterwards the structure that reflected the sound is 1029 metres away. A distant wall, cliff, etc can act like a mirror to sound. Sound travels much slower than light ( 1715 metres in 5 seconds) so you get the sound wave back after a delay.
What is an echo also why is it weaker than the original sound?
Sound is a vibration of molecules that can travel through the air. It bounces off solid objects, so that the sound returns to its source in the form of an echo. The echo is weaker than the original sound because the vibration travels in many directions, not just to the object that it bounces off of, so energy is lost that way, and more energy is lost by means of other inefficiencies in the system; even at the moment of reflection, some energy is absorbed into the same object which reflects the sound.
Why is the intensity of an echo less than that of the original sound?
Because the sound must lose energy on its way back from the reflector.
Why is an echoe weaker than the original sound?
It becomes weaker after colliding into other objects and dispersing some of its energy in other directions as well as picking up some foreign noise carried with it from the objects it bounces off.
How do bats use the Doppler effect?
A bat can tell how big an insect is based on the intensity of the echo. A smaller object will reflect less of the sound wave, and so will produce a less intense echo.The­ bat can sense in which direction the insect is moving based on the pitch of the echo. If the insect is moving away from the bat, the returning echo will have a lower pitch than the original sound, while the echo from an insect moving toward the bat will have a higher pitch. This difference is due to the Doppler effect
What is the definition of Echo?
There is more than one meaning a reflection of sound. repetition or imitation (of another's opinions) something that can continue after the original cause has disappeared a signal reflected by radar an electronic effect in music
What things have to happen in order for an echo to happen?
For an echo to occur, sound must be reflected off a hard surface. Additionally, the reflected sound must reach the human ear more than 1/15 of a second after the original sound or the reflected sound will not be able to be distinguished from the original. A true echo is only reflected once.
What are the condition required for occurrence an echo?
A true echo is one in which the source of sound is located in close vicinity to the receiver. You will requirea pulse of sound,a reflecting surface which is more than 17.2 metres from the sound source,the reflecting surface must be sufficiently smooth and at right angles to the direction of travel of the sound waves.
Why does an echo occur?
Sound waves reflect from objects. This is the echo. But a smooth surface and distance is required for this to occur. Sound moves at 343 meters per second in dry air at 20 degrees so if you make a sound and hear an echo 3 seconds afterwards the structure that reflected the sound is 1029 metres away. A distant wall, cliff, etc can act like a mirror to sound. Sound travels much slower than light ( 1715 metres in 5 seconds) so you get the sound wave back after a delay.
How is echo useful?
EchoesEchoes are usually used to measure distances for example a "Bat" creates a high velocity sound wave that hits its pray "The Moth" and it comes back with an echo of where abouts it is.Also something called an "Cardioechogram" also, known as a "Cardiogram" is used to measure the heart bps.So Echoes Are An Useful Measuring Device.
How does echo works?
An echo happens when sound waves bounce off an object. That's why if you scream into a hollow cave, there is an echo. Because the sound waves bounce off the walls and back at you
What is a reflecting sound wave called?
A reflected sound wave can be one of two things, an echo or a reverberation. Reverberation happens when sound bounces off surfaces and reaches back to the ear within 0.1 seconds. Echoes happen when sound waves bounce back to the ear after more than 0.1 seconds.
Does Pluto have a stronger or weaker gravity than earth?
Pluto has a weaker gravity than Earth. In fact, Pluto has a weaker gravity than Earth's moon.
