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Sound Waves | Reflection | Echo | Uses Of Echo | Part 2
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Physics (Grade 10) : High School Learning
Sound Waves | Reflection | Echo | Uses Of Echo | Part 2
~Reflection of sound waves
~Examples of reflection of sound waves, i.e an ECHO ;Conditions of echo;How it can be used to find the velocity; Real life examples
Echoing of sound which is based on reflection of sound and how it is used to measure the distance between object.
~Concept:
Similar to the reflection of light sound also shows properties of reflection following every part and the only constraint is that the thing through which the sound is reflected should be sufficiently larger than the wavelength of the sound (different from what the light waves require).
Reflection of sound is known as an Echo (a sound heard after the “reflection” of sound from a certain surface from a distant” optical” after the actual sound has stopped).
Note: -Echo is a result of reflection
-Caused by an original sound but
Human ear can distinguish sounds only if has more than a time gap of 0.1 seconds of time gap between the original and the reflected sound and the consequence of this is that the surface from which the reflection takes place needs to be at some distance so that it can get 0.1 seconds time to produce an echo. (Diagram cum numerical, explained).
~Condition for an echo to be heard:
1.Minimum distance criteria should be fulfilled ( d should be greater than 17 meter)
2.The obstacle should be larger than the wavelength of the sound
3.The intensity of the sound should be high enough or sufficient for the sound to have a proper amplitude.
~Usage of Concept of sound to determine the speed of echo.
~Practical uses of Echo (Note: ultrasonic sound can be used as it can travel large distances as it gets least absorbed by the surface).
All Rights Reserved
Sound Waves | Reflection | Echo | Uses Of Echo | Part 2
~Reflection of sound waves
~Examples of reflection of sound waves, i.e an ECHO ;Conditions of echo;How it can be used to find the velocity; Real life examples
Echoing of sound which is based on reflection of sound and how it is used to measure the distance between object.
~Concept:
Similar to the reflection of light sound also shows properties of reflection following every part and the only constraint is that the thing through which the sound is reflected should be sufficiently larger than the wavelength of the sound (different from what the light waves require).
Reflection of sound is known as an Echo (a sound heard after the “reflection” of sound from a certain surface from a distant” optical” after the actual sound has stopped).
Note: -Echo is a result of reflection
-Caused by an original sound but
Human ear can distinguish sounds only if has more than a time gap of 0.1 seconds of time gap between the original and the reflected sound and the consequence of this is that the surface from which the reflection takes place needs to be at some distance so that it can get 0.1 seconds time to produce an echo. (Diagram cum numerical, explained).
~Condition for an echo to be heard:
1.Minimum distance criteria should be fulfilled ( d should be greater than 17 meter)
2.The obstacle should be larger than the wavelength of the sound
3.The intensity of the sound should be high enough or sufficient for the sound to have a proper amplitude.
~Usage of Concept of sound to determine the speed of echo.
~Practical uses of Echo (Note: ultrasonic sound can be used as it can travel large distances as it gets least absorbed by the surface).
All Rights Reserved
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