What is ehco?

1. What do you mean by echo?
2. What is echo Short answer?
3. What is echo and examples?
4. What is echo and uses?
5. How does echo occur?
6. What is echo Amazon?
7. What is an echo Class 9 answer?
8. What is echo method in physics?
9. What is an echo Class 9?
10. Why is echo test done?
11. What is the importance of echo?
12. What are the advantages of echo?
13. What is the minimum distance to hear echo?
14. What is the minimum distance needed for an echo?
15. What surfaces produce the best echoes?

What do you mean by echo?

\ ˈe-(ˌ)kō \ plural echoes also echos. Essential Meaning of echo. 1 : a sound that is a copy of another sound and that is produced when sound waves bounce off a surface (such as a wall) We shouted into the canyon and listened to the echo of our voices. the echo of footsteps in the hall faint echoes.

What is echo Short answer?

Echo is the sound heard after reflection from a rigid surface such as a cliff, a hillside, the wall of a building etc.

What is echo and examples?

Echo is defined as a sound repeating by sound wave reflection, having a lasting or far reaching impact, or repeating what someone else has said. An example of echo is the repeating of a sound created by footsteps in an empty marble hallway. ... An example of echo is a teacher agreeing with and repeating what a parent says.

What is echo and uses?

Echoes are used by bats, dolphins and fisherman to detect an object / obstruction. They are also used in SONAR (Sound navigation and ranging) and RADAR(Radio detection and ranging) to detect an obstacle.

How does echo occur?

This phenomenon is called an echo, which has its origins in the Greek ekho, meaning “sound.” An echo happens when a sound wave reflects off a surface, such as the water at the bottom of a well, and the sound is repeated back to you. ... The original sound should be of short duration.

What is echo Amazon?

Amazon Echo is a product line of hands-free speaker and virtual assistant devices that interact with an end user via the Amazon Alexa cloud-based voice service. Echo devices connect to the Alexa service via the internet.

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 echo method in physics?

Echo method:

An echo is the phenomenon of repetition of sound on reflection from an obstacle. Here, a sound wave is sent to the obstacle and we observe the time it takes to return.

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.

Why is echo test done?

Your doctor may suggest an echocardiogram to: Check for problems with the valves or chambers of your heart. Check if heart problems are the cause of symptoms such as shortness of breath or chest pain. Detect congenital heart defects before birth (fetal echocardiogram)

What is the importance of echo?

An echo is a preliminary but yet comprehensive test for the heart. The test is a simple one and non invasive. With the help of the ultrasound machine both the cardiologist and the radiologist is able to see live images of the heart. The images are produced with the help of sound waves.

What are the advantages of echo?

Echoes can be useful or a nuisance. In a concert hall echoes can ruin a performance if the walls and ceiling are not properly designed. If the walls are too hard or too flat they make good reflecting surfaces for the sound waves. Echoes can be used to give vital information.

What is the minimum distance to hear echo?

Hence, to hear a clear echo, the minimum distance between the reflecting surface and the observer is 17 m.

What is the minimum distance needed for an echo?

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 surfaces produce the best echoes?

Hard, smooth surfaces are particularly good at reflecting sound. This is why empty rooms produce lots of echoes. Soft, rough surfaces are good at absorbing sound. This is why rooms with carpets and curtains do not usually produce lots of echoes.