[Tutorial] An Introduction to Using Markers in NoiseTools – Video

The Markers tool within the NoiseTools software is a powerful feature that allows sections of a measurement to be coded, analysed or removed from calculations. This video introduces the concept of markers and shows how to use the basic functions of the marker system.

Note that this video was made using NoiseTools 1.7.2. The latest version of NoiseTools can be从我们的网站下载.

For more information or to view other tutorials, please visit ourYouTube或者Vimeo频道。






The options available to us here are to select different data channels, so can have all the information available to us. And we also have available to us the ability to switch on and off certain view settings.

In this example [00:01:00] what we need to be able to show is user markers. So we’ll disable the other two, if they’re switched on, and click …

In this example we’re going to look at how we can use markers to remove particular noise sources from the overall measurement and then to recalculate our total LAEQ. If you remember, our overall LAEQ for this measurement is 93.4dB, quite high.



Now what we’re going to do is drag over the first spike, right click with our mouse, and select “Mark”. This brings up the “Add Marker” button, and we’re going to call this one, “Generator”.


And we’ll do that for the third noise source here. Again right click, “Mark” [00:02:30] and select “Generator”. Click “Okay”. Now we use our mouse wheel just to zoom out a little bit further. And again we can select some particular noise sources, we’ll zoom in and we’ll determine that this one here is a generator starting and stopping.

So generator again. Smaller one next to it, that’s a generator as well, mark that. Select generator. And we’ll carry on doing this for the noise sources in the measurement, working our way through. [00:03:00] The aim is to be able to mark up particular noise sources.



You can either zoom in or out using your mouse wheel, or you can use the slider bar at the bottom to move across the measurement data. So again, generator. There’s no limit to the number of markers that you can have. Markers can overlap each other. And you can have notes appended to each one.


So there we can see, we’ve highlighted a number of generators and we’ve highlighted the pump. If you hover your mouse over one, so we’ll hover over pump, the grey pop out box shows us that the noise level for that particular noise source and at that particular point.

We’re now going to look at looking the marker’s table. So hover and select “Markers” and the table will appear. Now what we see here is a list of all the generator noise sources and the pump noise source that we’ve already selected.


And at the bottom of the screen we now have a remainder. This is the noise that’s left once all those noise sources have been removed. If we untick some of the markers, [00:05:00] it stays the same.

我们知道,通过消除这些噪音苏rces, our overall LAEQ would go down to 82.9dB. So by removing all those markers, all those marked sections from the noise, this gives you the information to say, “Well, we’d be able to reduce from 93.4dB, if we took all those noise sources out, what would be left?” And the answer is 82.9dB.

Now that we’ve marked up our information, we can right click, and from the pop up that appears [00:05:30] on the screen, we can select, “Export”, “Generate Report”. And the software will create for us a time history measurement report, including all the marked sections.


And if you go to page two, we see the tabular format of the data. So here are all the individual markers, the LAEQ for each marker, the total [00:06:00] energy and LAEQ, one minute 13 seconds for the generator, the information for the pump. So we have one instance of the pump, 40 seconds and that was 99.8dB.



It would then allow you to determine whether you can use noise control measures, whether you’ve got to provide hearing protection, or by changing work need patterns you can reduce someone’s noise exposure.


Thank you.

Clarke Roberts

克拉克(Clarke)是一位高级营销主管,负责通过使用营销组合的各个方面来帮助人们找到Cirrus Research的创新噪声测量解决方案。

He particularly enjoys writing content about product applications, including noise nuisance, occupational noise and environmental noise pollution.

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