Alf C. C. Warnock
Inst. for Res. in Construction, Natl. Res. Council of Canada, Montreal Rd., Ottawa K1A 0R6, Canada
A comprehensive project to study all aspects of sound transmission through floors has just been initiated at the National Research Council of Canada. As well as airborne sound transmission, measurements will include: impact sound transmission using a standard tapping machine, a special rubber ball, a walker, and a tire machine meeting the relevant Japanese standard. As well as these measurements on complete floor systems, all material properties will be measured to provide a complete characterization of the floor systems. Vibration measurements to determine modal characteristics and damping will also be made. These measurements will be made in the new floor facility at NRC which has been found to give more reliable results than the old facility, which is no longer in use. Floors in the new facility measure 3.8 x 4.7 m, a more realistic size than the 2.4 x 2.4 m floor in the obsolete facility. An outline of the project will be given. Initial measurements on wood joist floors to look at the effects of methods of attaching the floor and ceiling layers will be presented.