In the acoustical design of a studio, the ratio of height, breadth and length of the studio should be _____

Felt and mineral wool are examples of _______

Rock wool comes under which of the following classifications of absorbents?

_________ is the number of cycles made by a sounding body per unit time.

The recommended volume for a public lecture hall is _______

Relative humidity of saturated air is _______

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

For lecture halls, large volumes are beneficial for weak sounds.