The term ______ is used to indicate a big room or a hall where sound is picked up by a microphone and it includes the ra…

In __________ system, the use is made of doors, windows, ventilators and skylights to make the room properly ventilated.

The width of the seats in an auditorium should be between ______

__________________ are used to collect the valuable chemical or mineral dusts.

In ___________ process, the fresh air is forced in the room and the vitiated air is allowed to leave the room by itself …

In winter, it becomes necessary to supplied slightly _____ air to the inside of the building.

Which of the following relations between loudness and intensity is correct?

Sound travels faster in gases than in solids.