Especially at a young age, shouting at the view as you go to an open and high area It has undoubtedly been one of your biggest hobbies. However, you may not experience the same excitement when you get home.

Agree What is the logic behind this?

An echo is a sound that returns to the source, like a boomerang.

To clearly perceive the reflected sound, be sufficiently large and return with some delay must. Delay is directly proportional to the distance of the reflective surface from the source of the sound and the listener.

Our ears are actually kind of, These are hearing aids that are worn on both sides of our heads. After a sound is emitted and the delay is less than a tenth of a second, the human ear cannot distinguish the perceived sound from the original.

Let’s assume that the speed of sound in air is about 340 m/s.

The total distance that sound travels in this narrow interval of 0.1 second is 34 meters. This, the reflected sound can be distinguished from the incoming sound and therefore perceived as an echo means that the obstacle must be at least 17 meters away.

If the echo returns within 1 second, the obstacle is 170 meters away. Likewise, echo When he returns 2 seconds later, he is 340 meters away.

Also echo, reflection should not be confused with . The main difference between echo and reverberation is that an echo is a wave that is received and reflected within one-tenth of a second.

This means that the obstacles are placed at very short distances, especially less than 17 meters.

In other words, the reason why echoes can be heard in the mountains but not in the rooms is: Receives reflected sounds in less than 0.1 second or the reflective surfaces are less than 17 meters away.

On the other hand, although you can hear echoes in an empty apartment, it is not possible to hear them in a house full of furniture. The reason you can’t hear echoes in a furnished house is because Furniture absorbs sound to reflect it.

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