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Subjective Listening Tests for Preferred Room Response in Cinemas - Part 2: Preference Test Results

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SMPTE and ISO have specified near identical in-room target response curves for cinemas and dubbing stages. However, to this author's knowledge, to date these standards have never been scientifically tested and validated with modern technology and measurement techniques. For this reason it is still not known if the current SMPTE and ISO in-room target response curves are optimal or if better solutions exist. Using a Binaural Room Scanning system for room capture and simulation, various seating positions in three cinemas were reproduced through headphones for the purpose of conducting controlled listening experiments. This system used a binaural mannequin equipped with a computer-controlled rotating head to accurately capture binaural impulse responses of the sound system and the listening space which are then reproduced via calibrated headphones equipped with a head-tracker. In this way controlled listening evaluations can be made among different cinema audio systems tuned to different in-room target responses. Results from a MUSHRA-style preference test are presented.

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