# Commission Regulation (EC) No 631/2009 of 22 July 2009 laying down detailed rules for the implementation of Annex I to Regulation (EC) No 78/2009 of the European Parliament and of the Council on the type-approval of motor vehicles with regard to the protection of pedestrians and other vulnerable road users, amending Directive 2007/46/EC and repealing Directives 2003/102/EC and 2005/66/EC, Division 3.7

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

The first natural frequency of the impactor shall be over 5 000 Hz and it is recommended to use damped accelerometers with a damping ratio of approximately 0,7.

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Source: https://www.legislation.gov.uk/eur/2009/631/annex/part/V/division/3/division/3.7 (the official version)
Page: https://openlegislation.uk/eu-regulation-2009-631/annex/part-V/division-3/division-3.7
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.