A computer-implemented method comprising: - obtaining or holding available a plurality of noise capture reports captured on a site, wherein said site is at least partially inside a building or a complex of buildings, wherein each noise capture report of said plurality of noise capture reports includes (i) respective position data representing a respective estimate of a respective capture position, (ii) respective noise data representing one or more respective noise characteristics captured at said respective capture position on said site, and (iii) respective time stamp data representing a respective capture time of said respective one or more noise characteristics at said respective capture position; - processing noise data represented by one or more of said plurality of noise capture reports, said one or more noise capture reports including respective position data representing a respective estimate of a respective capture position having a respective distance from an area or location on said site, wherein said respective distance is less than a predetermined distance threshold; - determining, as a result of the processing, a respective noise context of said respective area or location, wherein the respective noise context represents one or more noise characteristics which are expected to be typical for the respective area or location; - using said respective noise context to verify or update a map for said site by associating said respective noise context with a respective representation of said respective area or location included in the map, and/or by associating said respective noise context with a respective grid point of a grid system of the map, wherein said respective grid point corresponds to said respective area or location; - using said respective noise context to determine an intended use and/or a frequency of use of said respective area or location; and - verifying or updating the map for said site at least partially based on the intended use and/or the frequency of use determined for said respective area or location. - obtaining or holding available a plurality of noise capture reports captured on a site, wherein said site is at least partially inside a building or a complex of buildings, wherein each noise capture report of said plurality of noise capture reports includes (i) respective position data representing a respective estimate of a respective capture position, (ii) respective noise data representing one or more respective noise characteristics captured at said respective capture position on said site, and (iii) respective time stamp data representing a respective capture time of said respective one or more noise characteristics at said respective capture position; - processing noise data represented by one or more of said plurality of noise capture reports, said one or more noise capture reports including respective position data representing a respective estimate of a respective capture position having a respective distance from an area or location on said site, wherein said respective distance is less than a predetermined distance threshold; - determining, as a result of the processing, a respective noise context of said respective area or location, wherein the respective noise context represents one or more noise characteristics which are expected to be typical for the respective area or location; - using said respective noise context to verify or update a map for said site by associating said respective noise context with a respective representation of said respective area or location included in the map, and/or by associating said respective noise context with a respective grid point of a grid system of the map, wherein said respective grid point corresponds to said respective area or location; - using said respective noise context to determine an intended use and/or a frequency of use of said respective area or location; and - verifying or updating the map for said site at least partially based on the intended use and/or the frequency of use determined for said respective area or location.