प्रतिध्वनि
In audio signal processing and acoustics, an echo is a reflection of sound that arrives at the listener with a delay after the direct sound. The delay is directly proportional to the distance of the reflecting surface from the source and the listener. Typical examples are the echo produced by the bottom of a well, a building, or the walls of enclosed and empty rooms.
AI overview
An echo is a reflected sound that reaches your ear a noticeable time after the original sound is made, and the length of that delay depends on how far away the surface reflecting the sound is located. Echoes matter because understanding them helps us comprehend how sound behaves in different spaces, from natural settings like wells to buildings and rooms.
AI-generated from the Wikipedia summary — may contain errors.