Sound level charts


The charts show the sound level readings collected by the monitoring stations. Measurements are recorded every five minutes throughout the day. You can select a date range to look at how sound level trends change over time. To read more about what the readings mean click here.





Sound level indicators - what does the chart show?


LEQ is the average level across the 5 minute measurement periods


Sound level indicators - what does the graph show?


LEQ is the average level across the 5 minute measurement periods

L10 is the level exceeded 10% of the time and gives an idea of peak sound level

L95 is the level exceeded 95% of the time and gives an indication of the background sound levels