The maximum rate of air change is ______

In rigid homogeneous walls, the transmission loss of a one-brick wall is _____

The speed at which the sound wave travels or passed through any medium is termed as the __________

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

The rate of flow through an opening due to the wind blowing on the wall containing it is given by the expression _______

If the direction of the wind is at 45° to one of the faces, negative pressure will be produced on ______

For an echo to be distinguished as separate, it should reach the ear _____ of a second after the direct sound.

The rate of flow of air arising due to the difference in temperature of outside and inside is given by the expression __…