Impact noise reduction
Footsteps, slammed doors, and mechanical equipment can all cause their own brand of unwanted noise. Even when airborne sounds are controlled, there
still can be severe impact noise problems. Impact sound insulation is tested per ASTM E492, Laboratory Measurement of impact sound transmission using a tapping machine. Impact transmission is not significantly
affected by the weight of the floor. To control impact sounds, a structural concrete floor in combination with a carpet & pad greatly reduces the amount of impact noise (measured as IIC). Figure 5 below
shows the sound control potential of the hollow core slab used in conjunction with a carpet and pad system.