ITU-R is an international organization responsible for establishing international radio and telecommunications management systems and standards. Its predecessor was the International Telegraph Union, which was founded in Paris on May 17, 1865 and is the world's oldest international organization. Due to the long-term nature of the ITU as an international organization and its special status as a special agency of the United Nations, the standards issued by the ITU have a higher international recognition than most technical specification organizations of the same level. Years ago, the ITU developed a standard speaker placement guide for multi-channel systems.
We can refer to the ITU-R-BS.775 standard. ITU-R recommends placing the speakers with the position of the listener as a dot. Each speaker should surround the listener in a circle, and each speaker has the same distance. Based on the center speaker, the angle between the audience seat and the center channel is 0°, and the left front and right front speakers of the main channel are at an angle of 30° to the center speaker, and the left rear and right rear surround speakers are The center speaker has an angle of ±110~120°.
All speakers are centered on the audience position. Regarding the height of the speaker, the height of the center speaker, the left and right speakers, and the left and right surround speakers are the same. The tweeter on the speaker should be consistent with the listener's ear. That is to say, when we want to calculate the distance from the speaker to the seat, we should measure directly. The tweeter of the speaker and the position of the ear when the audience is sitting.
Although this ITU-R-BS.775 standard is very popular among professional home theater users, there are several other authorities that have developed speaker placements. We may wish to refer to their standards, such as Dolby, DTS, THX and Audyssey, these major institutions have deep definitions in 5.1 surround sound placement, and there are in-depth explanations on the configuration of 7.1, 9.1 and 11.2 surround sound. We may wish to make more reference comparisons to find out which one is right for you. Speaker configuration and placement.
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