This document describes the type test assessment method for acoustic signals at passenger external doors applying to rolling stock. The following applies to this standard: this document refers to acoustical passenger information indicating the release, opening and closing of passenger doors; this document is applicable to tonal signals with defined frequency components; this document is not applicable to spoken information. NOTE 1 Acoustic door signals in terms of TSI compliance are defined in EN 16584-2 Design for PRM use . NOTE 2 Acoustic doors signals in terms of door system function are described in EN 14752.