The repetition of sound caused by its reflection of a hard surface is known as echo. Factors important to get a distinct echo are: The minimum distance between the source and reflector of sound should be 17m. The size of reflector must be large enough as compared to the wavelength of the sound wave .
What is distinct echo?
(i) To hear a distinct echo, the time interval between the original sound and the reflected one must be at least 0.1 s . ... Echo is a repetition of sound due to the reflection of original sound by a broad and hard obstacle.
What is an echo what factors are important to get a distinct echo Brainly?
1) The minimum distance between the source of sound and the reflector in air must be 17m . 2) The size of reflector must be larger enough to the wavelength of sound wave. 3) The intensity of sound should be such that the reflected sound reaching the ear is sufficiently intense to be audible.
What is Echo answer the following?
In linguistics, an echo answer or echo response is a way of answering a polar question without using words for yes and no . The verb used in the question is simply echoed in the answer, negated if the answer has a negative truth-value. For example: “Did you go to the cinema?” (or “Didn’t you go to the cinema?”)
What determines an echo?
An echo is a sound that is repeated because the sound waves are reflected back . Sound waves can bounce off smooth, hard objects in the same way as a rubber ball bounces off the ground. Although the direction of the sound changes, the echo sounds the same as the original sound.
What are the conditions required for the formation of echo?
The necessary conditions for hearing an echo can be, The distance between the sound source and the place where it is reflected from must not be less than 17m and the period between hearing the original sound and its echo should not be less than 0.1 of a second.
Why we Cannot hear the echo produced in classroom?
Echo is a sound produced when the original sound is reflected by walls of a given room. ... So for the case of a classroom, no echo is produced because the learners and the furniture block the sound from reaching the wall hence no bouncing back of sound .
What is the minimum distance for an echo heard?
So, if the obstacle is at least 17 m away, then after 0.1 second, the reflected sound or the echo is clearly detected. Hence, to hear a clear echo, the minimum distance between the reflecting surface and the observer is 17 m.
What is the minimum distance required for a distinct echo in air?
Question: What is the minimum distance required to hear an echo? Answer: The velocity of sound in dry air is approximately 343 m/s at a temperature of 25 °C. Therefore, the reflecting object must be more than 17.2m from the sound source for echo to be perceived by a person located at the source.
What is the minimum distance of reflecting surface to hear distinct echo?
Thus, to hear the echo clearly in the air, the reflecting surface should be at a minimum distance of 16.5m from the source of sound.
What is an echo Class 9 answer?
Phenomenon of hearing back our own sound is called an echo. It is due to successive reflection of sound waves from the surfaces or obstacles of large size. To hear an echo, there must be a time gap of 0.1 second in original sound and the reflected sound.
What is an echo Class 9?
An echo is sound which is repeated . This is because sound is reflected back. Example- If we stand on top of mountain and shout our name. We hear the repetition of our sound.
What is an echo Shaalaa?
The sound heard after reflection from a rigid obstacle (such as cliff, a hillside, a wall of a building, edge of a forest etc.), is called an echo.
What is an echo what can you do to stop the formation of an echo?
- Cover the Floor. Carpets and rugs do more than provide soft padding for your feet. ...
- Cover the Walls and Windows. Wall and window coverings reduce the amount of sound reflecting off window glass and hard wall surfaces. ...
- Fill Rooms with Furnishings. ...
- Install Acoustic Panels.
What’s the difference between reverb and echo?
An echo is a single reflection of a soundwave off a distance surface. Reverberation is the reflection of sound waves created by the superposition of such echoes. ... An echo is usually clear and can be easily distinguished because of the distance and time the sound wave travels.
What two factors can affect the clarity of an echo?
The two components that affect echo are amplitude (that is, loudness of the echo) and delay (that is, the time between the spoken voice and the echoed sound).
