Hi,
I noticed this news article about a plan to find 100 people to do noise measurements in the city of Den Haag, Netherlands: Geluid in de stad meten? Vraag een meetapparaat aan - Den Haag
Did you hear about this? Perhaps this is a nice opportunity to share data for them.
Would sensor.community be interested in cooperation?
I can try to get in touch with the people behind this.
With kind regards,
Bertrik