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Geluid van Nederland (Sound of the Netherlands) is a project to collect field recordings of The Netherlands. This project is a partnership between Netherlands Institute for Sound and Vision, De Auditieve Dienst and Kennisland.
All the freely licensed clips are uploaded to Wikimedia Commons. A large part of the collection (2000 files) were donated by Netherlands Institute for Sound and Vision. Around 300 files were crowd sourced.
Questions about this project can be directed to Jesse de Vos.