Public address systems in buildings like airports, railway stations, shopping centers or concert halls have to clearly inform persons in danger about escape information and directions in case of an emergency,. The NTi Audio STI-PA analyzers measure the speech intelligibility of emergency systems in accordance with the standard 2003 IEC 60268-16. The STI-PA function measures the speech intelligibility of public announcement systems according the latest revision of IEC 60268-16:2003 standard. The...