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This standard specifies requirements for the sound pressure level and durability, as well as the appropriate method of measurement for bells, that are fixed to bicycles and to certain types of bicycles with auxiliary engine. This standard (DIN 33946:2009) has been prepared by German Working Committee NA 112-06-02 AA "Fahrrad-Zubehör" ("Accessories for bicycles") of the Sports Equipment Standards Committee (NASport) at DIN.
This document replaces DIN ISO 7636:1986-02 .