Acoustics specification for rail vehicles normally stipulate only a maximum value for the Permissible noise level under the various conditions of operation. For a number of projects, The reverberation time in the passenger compartment is additionally specified. In the case of Certain projects, also specifications relating to the intelligibility of speech form loudspeakers can be found. Nowadays, compartment coaches are built practically only for night trains. Hence, the challenge consists in incorporating The acoustic quality of such compartment coaches into modern passenger stock as far as possible. This article describes the Possibilities available for the development of models for the acoustic conditions in modern passenger stock.
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