Public Address and Voice alarm systems usually have to comply with performance requirements in terms of various acoustic parameters, including sound pressure level and the Speech Transmission Index. Whether the venue is an airport, a shopping mall, a train station or an office building, each system has its own specific characteristics and challenges. However, the certification requirements are usually quite similar: a wide range of standards imposes requirements based on Speech Transmission Index. The industry standard for measuring the Speech Transmission Index, the STIPA method, was originally developed by the embedded acoustics team. The very same team members who worked on STIPA are responsible for our PA/VA certification working, making them uniquely qualified.