APPENDIX F - Acoustic Report

RENZO TONIN RON RUMBLE                                                                                       1 SEPTEMBER 2017




APPENDIX A                    Glossary of terminology

The following is a brief description of the technical terms used to describe noise to assist in
understanding the technical issues presented.

Adverse weather         Weather effects that enhance noise (that is, wind and temperature inversions) that occur at a site
                        for a significant period of time (that is, wind occurring more than 30% of the time in any
                        assessment period in any season and/or temperature inversions occurring more than 30% of the
                        nights in winter).

Ambient noise           The all-encompassing noise associated within a given environment at a given time, usually
                        composed of sound from all sources near and far.

Assessment period       The period in a day over which assessments are made.


Assessment point        A point at which noise measurements are taken or estimated. A point at which noise
                        measurements are taken or estimated.

Background noise        Background noise is the term used to describe the underlying level of noise present in the ambient
                        noise, measured in the absence of the noise under investigation, when extraneous noise is
                        removed. It is described as the average of the minimum noise levels measured on a sound level
                        meter and is measured statistically as the A-weighted noise level exceeded for ninety percent of a
                        sample period. This is represented as the L90 noise level (see below).

Decibel [dB]            The units that sound is measured in. The following are examples of the decibel readings of every
                        day sounds:
                        0dB   The faintest sound we can hear
                        30dB A quiet library or in a quiet location in the country
                        45dB Typical office space. Ambience in the city at night
                        60dB CBD mall at lunch time
                        70dB The sound of a car passing on the street
                        80dB Loud music played at home
                        90dB The sound of a truck passing on the street
                        100dBThe sound of a rock band
                        115dBLimit of sound permitted in industry
                        120dBDeafening

dB(A)                   A-weighted decibels. The A- weighting noise filter simulates the response of the human ear at
                        relatively low levels, where the ear is not as effective in hearing low frequency sounds as it is in
                        hearing high frequency sounds. That is, low frequency sounds of the same dB level are not heard
                        as loud as high frequency sounds. The sound level meter replicates the human response of the ear
                        by using an electronic filter which is called the “A” filter. A sound level measured with this filter
                        switched on is denoted as dB(A). Practically all noise is measured using the A filter.

dB(C)                   C-weighted decibels. The C-weighting noise filter simulates the response of the human ear at
                        relatively high levels, where the human ear is nearly equally effective at hearing from mid-low
                        frequency (63Hz) to mid-high frequency (4kHz), but is less effective outside these frequencies.

Frequency               Frequency is synonymous to pitch. Sounds have a pitch which is peculiar to the nature of the
                        sound generator. For example, the sound of a tiny bell has a high pitch and the sound of a bass
                        drum has a low pitch. Frequency or pitch can be measured on a scale in units of Hertz or Hz.

Impulsive noise         Having a high peak of short duration or a sequence of such peaks. A sequence of impulses in
                        rapid succession is termed repetitive impulsive noise.

Intermittent noise      The level suddenly drops to that of the background noise several times during the period of
                        observation. The time during which the noise remains at levels different from that of the ambient
                        is one second or more.

LMax                    The maximum sound pressure level measured over a given period.

LMin                    The minimum sound pressure level measured over a given period.




COX ARCHITECTURE                                                         OUTDOOR RESTAURANT DECK (LEVEL 2) - 6 HERON STREET,
QB143-01F02 ACOUSTIC REPORT (2)                                                                              PEREGIAN BEACH
                                                             14                                 PATRON NOISE ASSESSMENT