Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 9 Answered

HOW CAN WE HEAR THE ECHO IN AN EMPTY SMALL ROOM WHOSE LENGTH IS LESS THAN 17.2 METRES ?
Asked by MANISHA MOHANTY | 11 Jan, 2012, 09:56: PM
answered-by-expert Expert Answer
The affect of a particular sound wave upon the brain endures for more than a tiny fraction of a second; the human brain keeps a sound in memory for up to 0.1 seconds. If a reflected sound wave reaches the ear within 0.1 seconds of the initial sound, then it seems to the person that the sound is prolonged. The reception of multiple reflections off of walls and ceilings within 0.1 seconds of each other causes reverberations - the prolonging of a sound. Since sound waves travel at about 340 m/s at room temperature, it will take approximately 0.1 s for a sound to travel the length of a 17 meter room and back, thus causing a reverberation.
This is why reverberations are common in rooms with dimensions of approximately 17 meters or less.
Answered by | 11 Jan, 2012, 10:06: PM
CBSE 9 - Physics
Asked by manaskumarbiswasbrb | 04 Feb, 2023, 08:35: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
Asked by sm6878261 | 12 Jan, 2023, 07:42: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
Asked by pooja12366764 | 25 Jan, 2022, 10:46: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
Asked by ashishyadav | 22 Mar, 2021, 05:20: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
Asked by Alamglassfebricartion | 16 Mar, 2021, 09:57: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
Asked by satyamthakur7570 | 21 Dec, 2020, 09:04: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
Asked by mursaleenmalik1962 | 14 Dec, 2020, 07:18: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
Asked by dwarakanathan.s | 19 Apr, 2020, 07:02: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
Asked by upmasoodpassi | 05 Apr, 2020, 11:09: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
Get Latest Study Material for Academic year 24-25 Click here
×