ASL Safety & Security have provided IP-networked Public Address (PA) systems at over 50 stations on London Overground Rail Operation Limited’s network.

Many of the locations are using ASL’s pioneering dynamic ambient noise sensing system (DANS) to overcome background sounds and reduce noise pollution. All London Overground stations are secure station accredited by the Department of Transport and this CIS project serves to enhance the already-high customer service standards.The project includes monitored PA equipment at 44 stations. ASL have also provided Public Address and Voice Alarm (PA/VA) systems for installation at ten stations on the East London Line, with this equipment also including ASL’s Voice Over Internet Protocol (VoIP) LLPA equipment. A dozen sites have upgraded or maintained to BS5839:8 voice alarm specification, with the client opting for ASL’s ruggedised radio microphones which have been developed for ergonomic and audio performance after use on London Underground.London Underground stations including North Wembley, Queens Park, West Brompton and Harlesden are also benefiting from dynamic ambient noise sensing which improves audibility of train platform announcements by using signal processing to distinguish between ambient noise and the announcement, optimising volume levels in real time. Other equipment being used includes ASL’s Intellevac VAR router range and Adaptive Class D amplifiers which are among the most power-efficient in the industry.

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