Att6 - Noise Impact Assessment

Christian Youth Council
Environmental Noise Level Impact Assessment for Proposed Extensions to CYC Youth Camp,
48 Kabi Road, Cootharaba                                                                                                                                                   Page 8 of 22




AMBIENT NOISE LEVEL MEASUREMENTS

Table 1 details the results of the ambient noise assessment conducted from monitoring location A on
the subject site adjacent to the western boundary for the daytime, evening and night-time periods –
refer Figure 1 for further detail, Appendix A for details of measurement equipment, equipment settings,
calibration, etc., Appendix B for graphical presentation of key parameters and Appendix C for
atmospheric conditions.

With respect to noise the following should be noted:

    •      daytime:             0700 to 1800 hours;
    •      evening:             1800 to 2200 hours;
    •      night-time:          2200 to 0700 hours;
    •      ‘A’ weighted:        adjustment made by the sound level meter to the measured noise to
                                correspond to the response of the human ear. This adjustment is
                                standardised by international noise standards;
    •      LAeq,T:              the equivalent continuous (or approximately the ‘average’) ‘A’ weighted sound
                                pressure level for the measurement period ‘T’;
    •      LA1,T:               the ‘A’ weighted sound pressure level exceeded for 1% of the measurement
                                period ‘T’;
    •      LA10,T:              the ‘A’ weighted sound pressure level exceeded for 10% of the measurement
                                period ‘T’, which is an approximation of the ‘average of the maximum noise
                                levels’;
    •      LA90,T:              the ‘A’ weighted sound pressure level exceeded for 90% of the measurement
                                period ‘T’, which is an approximation of the ‘average of the minimum noise
                                levels’, which is also known as the ‘background’ noise level;
    •      RBL:                 the Rating Background Level is the 10th percentile of the LA90,T background
                                sound levels for the periods daytime, evening and night-time, and is a single
                                figure for each of these time periods.

                                                                 Table 1
                                       Results of Ambient Noise Assessment, Monitoring Location A
                                                      LAeq,T                            LA1,T                            LA10,T                            LA90,T                 RBL
                                                        Maximum




                                                                                         Maximum




                                                                                                                           Maximum




                                                                                                                                                             Maximum
                                            Minimum




                                                                              Minimum




                                                                                                               Minimum




                                                                                                                                                 Minimum
                                                                   Average




                                                                                                    Average




                                                                                                                                      Average




                                                                                                                                                                        Average


     Day             Date       Time                                                                                                                                               Average




                               Evening     29.1        45.5       36.8       33.9       57.4       46.4       29.5        49.5       39.6       23.6        37.6       32.0       24.2
 Wednesday          06.07.22
                               Night       26.0        41.4       36.0       31.5       49.8       43.4       26.0        43.5       38.3       22.0        37.5       31.8       22.4

                               Day         34.2        56.4       47.0       39.0       68.6       57.3       35.6        59.1       49.8       29.5        45.8       37.8       31.2

 Thursday           07.07.22   Evening     24.4        45.7       35.6       34.1       58.0       46.6       26.4        48.5       38.1       20.4        33.2       28.4       20.6

                               Night       20.9        41.2       32.3       26.3       53.6       43.0       22.0        42.6       34.9       19.4        29.5       23.9       19.8

                               Day         32.6        55.6       46.8       38.9       69.1       58.5       35.4        58.5       48.7       27.1        42.9       36.3       29.6

 Friday             08.07.22   Evening     25.8        41.8       36.1       30.8       50.3       44.6       27.5        45.5       39.4       22.8        36.1       29.2       23.4

                               Night       21.7        44.6       36.2       24.6       52.5       45.0       21.5        45.9       38.4       20.3        35.2       27.4       20.5

                               Day         28.5        47.6       41.0       36.7       61.1       51.1       30.8        47.8       42.0       24.0        40.1       33.9       25.9

 Saturday           09.07.22   Evening     24.9        36.7       31.4       32.4       48.3       40.4       26.9        39.6       33.2       21.0        32.6       24.4       21.1

                               Night       28.7        42.0       35.6       32.9       54.0       43.8       30.8        45.6       38.1       23.5        36.9       31.0       25.8

                               Day         30.7        58.8       45.3       37.8       68.5       56.1       34.1        64.5       49.3       26.0        38.8       33.1       30.2

 Sunday             10.07.22   Evening     28.0        33.8       30.8       32.6       42.3       39.7       28.9        36.4       33.0       25.0        28.9       26.6       25.1

                               Night       24.2        50.2       37.2       27.1       64.9       50.6       24.8        45.4       35.8       22.6        34.6       27.7       23.9




David Moore & Associates Pty Ltd                                                                   Our reference: R22072.docx/D3681/Rev.0/25.08.2022