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 learn more about what the readings mean click here.

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What does the graph show?

Leq is the average level across the 5 minute measurement periods.

What does the chart show?

This chart shows the average sound levels for each hour of the day. If you select more than one day, then all the readings for that timeframe will be averaged.