Question

When a sound is reflected from a distant object, an echo is produced. Let the distance between the reflecting surface and the source of sound production remains the same. Do you hear echo sounds on a hotter day?

Answer 1

Echo:

Because sound perception lasts only $0.1\mathrm{seconds}$ in memory, there would be a little temporal gap between the perception of the original sound and the perception of the reflected sound. As a result, we refer to a reflected sound wave's experience as an echo.

1. The speed of sound increases as the temperature rises.
2. As a result, the velocity of sound in the air increases as the temperature rises.
3. As a result, the temporal difference between the incident and reflected waves shrinks.
4. To hear an echo, a human ear now requires a minimum delay of$\frac{1}{10}\mathrm{th}$ a second.
5. On a hotter day, an echo can be heard if the time interval is greater than $0.1\mathrm{second}$. Due to the faster velocity of sound on a hotter day, the time gap between the incidence of original and reflected sound is less than 0.1s.
6. As a result, the chances of hearing an echo are low.