Over 250,000 registrations with Explane

Users of the Explane app have registered over 250,000 cases of aviation noise. This milestone has been reached two weeks ago.

One of the pages of the website with all aviation noise registrations from Explane users.

Although the Covid19-period was a little slower because of the ‘lack’ of aircraft, air traffic has since June 2020 picked up again. Also did the number of registrations.

In August 2020 alone we received almost 30,000 registrations. Most of them come from The Netherlands because we promote the app actively in our home country. Dutch people have made over 240.000 measurements of aviation noise since Explane was released in January 2019.

Picking up in other countries
However we do see a relatively strong growth in other countries. UK users sent in over 15,000 measurements, Australians almost 6,000 registrations, Belgians a thousand, as well did US residents. Read more >

City of Rotterdam embraces Explane app

Rotterdam is the first municipality in the world to support the Explane app for measuring aircraft noise.

Alderman Arno Bonte (GroenLinks) of Rotterdam will actively bring the Explane app to the attention of the Rotterdam population and wants to compare the results with those of the official reporting point of the DCMR environment service (photo: Municipality of Rotterdam).

This confirmed alderman Arno Bonte (GroenLinks) last Wednesday in a committee meeting of the Rotterdam city council.

Mayor Aboutaleb and the aldermen think the Explane app is a welcome addition to the DCMR environmental reporting system.

The alderman finds the app user-friendly and works well. “We will actively offer the app to residents of our city.”

Putting results together
Bonte believes that the app can work well in addition to the usual way of reporting from the environment service via the website or by telephone for years. “Afterwards we simply compare the results.” Read more >

No airplane captured (3)

Sometimes our app Explane says ‘No airplane captured’ after you have tried to measure the sound level of a passing aircraft.

We have asked our developer Roelof Meijer what the reasons can be for this annoying warning. He came up with several checks the app does before registering your measurement.

  • If there is no data available from the transponder of the plane (latitude, longitude, altitude) or if a plane is not equipped with a transponder (mostly older aircraft).
  • If the data available from the transponder is older than 15 seconds, the location data of the airplane is too old to be useful.
  • If the download of the transponder data takes more than 4 seconds. For example if you have a bad internet connection.
  • Read more >

    Average deviation Explane app only 2 decibels

    Just before the summer holidays we organized a calibration day with a large number of volunteers to find out to what extent the measurements with the free Explane app correspond to the real noise level. On average, Explane appears to deviate only 2 dB from a calibrated dB meter.

    Photo by Aaron Barnaby via Unsplash

    Explane.org and SchipholWatch are very happy with these results, especially since the measurements with Explane now appear to be more reliable than the calculations by the Dutch Ministry of Infrastructure & Water Management and those of Amsterdam Schiphol Airport.

    ‘6 dB is within expected margins’
    As a reminder: the measurements of a test flight mid-last year (‘experience flight’) were sometimes as much as 6 dB higher than the previously calculated values. The minister, Cora van Nieuwenhuizen, called this deviation “well within the expected margins”. Read more >