Quality control of electro-acoustics on metro lines L9 and L10 in Barcelona
KEACOUSTICS CARRIED OUT THE QUALITY CONTROL OF THE ELECTRO-ACOUSTICS ON METRO LINES L9 AND L10 IN BARCELONA
Keacoustics carried out a set of electro-acoustic measurements at fourteen stations on the L9 metro line and at two stations on the L10 metro line in Barcelona with the aim of meeting the acoustic quality standards. The level of coverage and the degree of speech intelligibility of the entire electro-acoustic chain in each station was validated, from the desk of the station master who is the source of the messages, to the speakers installed in the different areas.
Through different broadband signals played through the electro-acoustic system by a human head simulator, extensive spatial sampling was carried out for all station facilities. Using specialised frequency analysers, octave band sound pressure values and STIPA (Speech Transmission Index Public Address), word intelligibility was measured according to international standard EN 60268- 16: 2011.
Thanks to the commitment of the TÜV Rheinland Group in Spain and UTE Energía L9, the extensive measurement campaign of the complex environment could be managed, ensuring optimal measurement conditions, and guaranteeing efficient delivery to TMB.