STIPA (Speech Transmission Index for Public Address Systems) is a version of the STI using a simplified method and test signal. Within the STIPA signal, each octave band is modulated simultaneously with two modulation frequencies. Building Acoustics (also known as architectural or room acoustics) is the science and engineering of achieving a good sound within a building.
Building acoustics is generally about achieving good speech intelligibility in a theatre, restaurant or railway station, enhancing the quality of music in a concert hall or recording studio, or suppressing noise to make offices and homes more productive and pleasant places to work and live in. A key parameter in building acoustics is reverberation time which is a measurement of the way a space ‘sounds’ and hence gives an indication of the intelligibility of sound in that space. A high reverberation time, for example, can make a room sound muffled, loud and noisy. Rooms designed for speech typically have a low reverberation time whereas a higher reverberation time can add depth, richness and warmth to music. The reverberation time of a room is defined as the time it takes for sound to decay by 60 dB after an abrupt termination.
For STIPA we work with Embedded Acoustics who are the people who invented STIPA in the first place.