Logo NoiseCapture NoiseCapture protocol


In this page you will find informations about the use of the NoiseCapture app.

Install NoiseCapture


NoiseCapture is an Android application. To install it, you have to follow these instructions:

  • Go on the Google Play Store and sign in (an account is needed to have the right to install applications),
  • Use the search engine to find the "NoiseCapture" app,
  • Once you are in the "NoiseCapture" page, click on the "Install" icon.

You can also click
on the following shortcut ...
Get it on Google Play

...or flash the this QR Code.
NoiseCapture QrCode

Alternatively, you can also download NoiseCapture from the free Aptoide store.

How to measure noise?


Below is presented a full description on how to use NoiseCapture, allowing to record noise in a good conditions:

Requirements

To use NoiseCapture, there is only two requirements:

  1. Use a smartphone that is equiped with a GPS. Before starting to record noise, you have to activate the geolocalization (your GPS),
  2. Your smartphone has to have at least Android 4.0.3.

In addition, we encourage (if possible) users to calibrate their smartphones. For more informations, please consult this page.

Starting home page


Once you launched the application, you will arrive on this "home page" (see on the right). In this interface, you have:

  1. dB value: real time noise level (exprimed in dB(A)),
  2. GPS precision: exprimed in meter, this information show you if your smartphone is well geolocalized or not. We assume that the localization is good under 10 meters,
  3. Noise representation (see "Measuring modes" below),
  4. Recording button: press it to start the measure.


NoiseCapture measures


Start measuring


Start measuring


Once you started the recording (you clicked on the dedicated icon), you obtain this interface (on the left), with the following informations:

  1. dB value: real time noise level (exprimed in dB(A)),
  2. Noise statistics: min, moy and max noise dB values,
  3. Measure's duration,
  4. GPS precision, exprimed in meter,
  5. Noise representation (see "Measuring modes" below),
  6. Stop recording button: press it to stop the measure,
  7. Pause recording button: press it to pause the measure.

Measuring modes


During the recording, you have the possibility to change the representation mode. Here, by clicking on the dedicated tabs, you have the choice between:

  1. Spectrum: the noise is represented thanks to frequencies bands,
  2. Spectrogram: the noise is displayed as a graph with two geometric dimensions: the horizontal axis represents time, while the vertical axis is frequency; a third dimension (color) indicating the amplitude in dB(A),
  3. Map : follow in real time on the map where you already made measures and where you should go.


NoiseCapture measures


Describe your measure


Describe your measure


When your measure is finished, you are invited* to describe your track through the following entries:

  1. Free description: Describe your measure thanks to a free text**,
  2. NoiseCapture party code: specify the code of your party (see NoiseCapture party),
  3. Take a photo to illustrate your track**,
  4. Pleasantness indicator: rate your measure,
  5. Measure conditions: click on the appropriate tags,
  6. Main noise sources: click on the appropriate tags (in this example, "Roads" and "Industrial" are selected),
  7. Clear the measure,
  8. Validate the description and your measure.
* If you don't want to add description, just press the "Validate" icon,
** This information is private and is not uploaded on our server.

Results


Once you validated the description part, you can see the resulting measure informations. Here you have:

  1. Noise indicators: min, LA90, LA50, LA10 and max values,
  2. Mean noise level, exprimed in dB(A),
  3. Noise exposure distribution: time repartition of the different dB classes,
  4. Mean noise spectrum chart,
  5. Share the mesure (thanks to e-mail, ...) or your Twitter account,
  6. Go back to "Measure" panel,
  7. If your smartphone has no internet connexion, the measure will not been uploaded to our server. Once you obtain a connexion, press this button to send us your measure,
  8. Show the resulting measure in the map.


Measure results


Visualize maps


Visualize maps


In the map panel, you have:

  1. Zoom tools,
  2. Background layer selector: choose between "OpenStreetMap" layer, or a satellite imagery,
  3. Noise layer selector: check the layer you want to display. You choose to visualize your last measurement, all your past contributions or the community map*,
  4. The map, displaying the choosen layers,
  5. The legend.
* You can also access this community map with a web browser from a computer (recommended solution for better display) with the following web link: http://noise-planet.org/map_noisecapture/index.html.

Manage your measures



In the application menu, you can access to the "History" page. Here you can:

  1. See the list of all your past measures. A color indicator gives you an indication on the mean dB level of the measure. Informations concerning the duration and the date are also displayed,
  2. Visualize a cloud icon that indicates if the measure has been uploaded or not on our server (blue means that it has been uploaded).


Manage results


Recommendations for measures


Guidelines for a relevant measure:

  • Do not hesitate to move (walking) during a same measurement, trying however not to add a noise that would be related to your displacement (the measurement in two-wheels or in car should be avoided).
  • If you are in a rather quiet place, it is recommended to do the measurement without moving, but by regularly changing position (i.e. one separate measure by location).
  • The duration of a measurement is an important point: prefer a measurement over a long duration (several tens of seconds), than several measurements of a short duration.

Practical tips for measurement:

  • The measurement shall be carried out outside buildings,
  • The smartphone should not be in the pocket,
  • The smartphone must be held by hand,
  • The smartphone microphone should not be hidden,
  • Make a noise measurement without making any noise yourself!
  • Do not measure under rainy or windy conditions,
  • It is possible to use an external calibrated microphone with a better quality.

What to do in case of problems?