# Commission Directive (EU) 2015/996 of 19 May 2015 establishing common noise assessment methods according to Directive 2002/49/EC of the European Parliament and of the Council (Text with EEA relevance), Division: CASE 1: the data on the number of inhabitants is available

Extent: E+W+S+N.I.

1A The number of inhabitants is known or has been estimated on the basis of dwelling units. In this case the number of inhabitants of a building is the sum of the number of inhabitants of all dwelling units in the building:
Inh building = ∑ i = 1 n Inh dwelling unit i
(2.8.1)
1B The number of inhabitants is known only for entities larger than a building, e.g. sides of city blocks, city blocks, districts or even an entire municipality. In this case the number of inhabitants of a building is estimated based on the volume of the building:
Inh building = V building V total × Inh total
(2.8.2)
The index ‘total’ here refers to the respective entity considered. The volume of the building is the product of its base area and its height:
Vbuilding = BAbuilding × Hbuilding
(2.8.3)
If the height of the building is not known, it shall be estimated based on the number of floors NFbuilding , assuming an average height per floor of 3 m:
Hbuilding = NFbuilding × 3 m
(2.8.4)
If the number of floors is also not known, a default value for the number of floors representative of the district or the borough shall be used.
The total volume of residential buildings in the entity considered Vtotal is calculated as the sum of the volumes of all residential buildings in the entity:
V total = ∑ i = 1 n V building i
(2.8.5)

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Source: https://www.legislation.gov.uk/eudr/2015/996/annex/division/ASSESSMENT/division/2/division/2.8/division/1/division/1 (the official version)
Page: https://openlegislation.uk/eu-directive-2015-996/annex/division-ASSESSMENT/division-2/division-2.8/division-1/division-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.