Cinema Sound: Characteristics and 3D Acoustic Measurements

In 2014,an SMPTE report stated that sound consistency between dubbing stages and performance venues was not respected. SMPTE technical commission studied this issue in 3 commercial cinemasand 3 dubbing stages in Hollywood using the impulse response method. This lack in sound consistency isprobablyimputable to the useof a wrong calibration system (RTA + Pink Noise Method) that is time-blind and does not mimicthe perceptual listening of the human being.A campaign of measurements has been conducted in Rome to test the acousticpropertiesof a dubbing stage room and a cinemaperformanceroom.Two measurement systems were implemented: One for the extraction of ISO 3382 parameters (Omni, Binaural, Soundfield) and one for studying the spatial distribution of sound in the room (EigenmikeTM).