Question

The echo is softer (less loud) than the original sound due to the decease in ______ of the wave.

Options

• amplitude

• frequency

Answer 1

The echo is softer (less loud) than the original sound due to the decease in amplitude of the wave.

Explanation:

The loudness of a sound wave is determined by its amplitude. An echo is the reflection of sound. During reflection, some of the sound energy is absorbed by the reflecting surface, and the energy also spreads out over a larger area. This results in the reflected wave having a smaller amplitude than the original wave. Therefore, the echo is softer due to the decrease in amplitude.