Hunter Power Project - Environmental Noise Monitoring

LA1,1minute The A-weighted noise level which is exceeded for 1% of the specified time period of 1 minute. [...] LA50 The A-weighted noise level which is exceeded for 50% of the time, also the median noise level during a measurement period. [...] LA90 The A-weighted noise level exceeded for 90% of the time, also referred to as the “background” noise level and commonly used to derive noise limits. [...] 2.5 Additional requirements Monitoring and reporting have been done in accordance with the NSW EPA ‘Noise Policy for Industry’ (NPfI) issued in October 2017 and the ‘Approved methods for the measurement and analysis of environmental noise in NSW’ (Approved Methods) issued in January 2022. [...] However, no general statement or conclusion can be made about conformance of the sound level meter to the full requirements of IEC 61672- 1:2013 because evidence was not publicly available, from an independent testing organisation responsible for pattern approvals, to demonstrate that the model of sound level meter fully conformed to the requirements in IEC 61672-1:2013 and because the periodic te.