MCU21.0193-Att 1 Acoustic Report

 3. Davidson Hair Test Results
 To test the floor samples, a 25kg dumbbell was dropped repeatedly in a manner that would
 be expected during operation. Weight drops were conducted in the centre of the proposed
 gym area on the existing floor on each sample and then measured at the respective sensitive
 receivers.

 The results of the measurements from the Davidson Hair are presented in the table below:

                                   Table 1: Results of Free Weights (Davidson Hair)


                      Receiver         Background          Floor         Test           Lmax    Vibration
 Drop Area                                                                                                    Audibility
                       Room             L90 (dBA)         Sample       Scenario         (dBA)    impact
                                                            SMAI
                                                           Rubber        25kg                                  Clearly
                                                                                         56     Moderate
                                                            Gym        Dumbbell                                Audible
                                                          Flooring
  Centre of
                                                        Single Layer
proposed gym                                                             25kg
                   Davidson Hair             39           Regupol                        46     Moderate       Audible
     floor                                                             Dumbbell
                                                            4080
 (Location 1)
                                                           Double
                                                            Layer        25kg                                   Just
                                                                                         41      Minor
                                                          Regupol      Dumbbell                                Audible
                                                            4080

 Weight drops from the 25kg Dumbbell conducted on proposed flooring and Single Layer
 Regupol 4080 produced significant noise and vibration impacts to the adjacent tenancy,
 primarily through the floor. When testing a double layer of Regupol 4080, noise and vibration
 impacts to the Davidson Hair were substantially reduced.

 Tests conducted on all samples were still audible at the measurement location due to structural
 vibration primarily through the floor.



 3.1      Wall (Airborne Noise) Test Results
 An airborne noise transmission test was conducted through the intertenancy wall. The results
 of the wall testing are presented in Table 2 as follows;

                                    Table 2: Wall Transmission Loss Test Results
        Source                 Receiver                  DnT,w                    Ctr              DnT,w + Ctr
    Lift Strength and
                             Davidson Hair                38                      -2                     36
   Conditioning Noosa

 The result is based on the overall composite sound transmission loss of the wall partition, plus
 potential flanking over the ceiling and via the flooring. The PA system will need to be limited
 to improve the subjective levels within the gym. See Section 5.2 for recommendations.




 Acoustic Works 2/8 Castlemaine St, P.O. Box 1271 Coorparoo DC QLD 4151 Phone (07) 3393 2222                  Page 5