New speech sound source from Brueel & Kjaer

摘要

Brueel & Kjaer has launched a new, battery-powered speech sound source. Used in combination with the DIRAC 6 room acoustics software, the new Echo Speech Source Type 4720 enables users to perform speech intelligibility measurements, which meet standards IEC 60268-16 and ISO 3382-3 (open plan offices). The echo speech source works as a standalone tool with five in-built calibrated signals, which are used by the DIRAC room acoustics software to calculate a range of speech intelligibility parameters, such as STI, STIPA and RASTI based on the impulse response of the room being measured.