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What is LAeq (T)?

What is LAeq (T)?

LAeq,T is the A-weighted Leq, measured over a specified period of time (T) Most community and industrial noise measurements are A-weighted so the LAeq descriptor is widely used. Early sound level meters had a very limited dynamic range, so if the sound levels fluctuated by more then 20 dB during a measurement, the accuracy was in doubt.

What is a Leq?

The formal definition is “when a noise varies over time, the Leq is the equivalent continuous sound which would contain the same sound energy as the time varying sound”. However, you can think of it as a type of average, where noisy eventshave a significant influence.

What is LAeq in noise analysis?

The results of calculations or measurements Such measurements are designated say 46.3 dBA Leq or 46.3 LAeq. LAeq is the main unit used for assessing Occupational Noise. If we again look at our noise trace, two successive 10 second LAeq’s and the cumulative LAeq can be plotted in yellow, green and blue respectively.

What does LAeq mean in physics?

That is the equivalent value or average of the energy over the entire graph. LAeq is not always a straight line. If the LAeq is recorded over time – i.e. plotted as the equivalent from the beginning of the graph to each of the measurement points – the plot looks like this.

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