Question

Double doors and windows having separate frames and enclosing soundabsorbing materials are used to reduce

Answer 1

Explanation:

Double door and windows having separate frames and enclosing soundabsorbing materials are used to reduce echo.

echo is the vibration of sound that is produced repeatedly from one sound.

vote thanks and rate 5 .

mark it as brainliest.

Answer 2

I hope it's helpful for you..