To hear a distinct echo, the time interval between the original sound and reflected sound must be at least ______.
0.1 seconds
Understanding Echo Time Interval
An echo is perceived when a reflected sound wave reaches the listener at a noticeably later time than the original sound. The human ear requires a minimum time gap to distinguish between the original sound and the reflected sound.
This minimum time interval is necessary for the auditory system to process the two sounds distinctly.
Minimum Time for Distinct Echo
Experimental evidence and psychoacoustic studies show that the time interval between the direct sound and the reflected sound must be at least 0.1 seconds for a distinct echo to be heard.
- If the time interval is less than 0.1 seconds, the reflected sound is perceived as a prolongation or reverberation of the original sound, not a separate echo.
- Therefore, a time interval of 0.1 seconds or more is required for the perception of a distinct echo.
Important Questions from Physics
Two balls, A and B, are thrown simultaneously, a vertically upward with a speed of 20 m/s from the ground and B vertically downward from a height of 40 m with the same speed and along the same line of motion. At what points do the two balls collide by taking acceleration due to gravity as 9.8 m/s 2?
On the basis of which principle does soap clean surfaces?
Which one of the following devices is used to measure atmospheric pressure?
Which one of the following energy is stored in the links between the atoms?
Who among the following has explained the phenomenon of photoelectric effect?
