3DII Blog - Cinema Audio and Video
2:35 AMThis post is for a new trimester, let's make this post simple, I'm sure there are lots of explanation and history about surround sound, but at the end, what's important is to understand the concept.
A lot of people were curious about what's the point one means, it actually has a meaning for it, and it's used in many of Surround Sound standards. One of it the most common Dolby Surround 7.1 is shown below,
The term "7.1 = 7 full bandwidth channels + 1 low-frequency effects channel
Bandwidth channel can be known as the number of positions the speakers were placed at. While the low-frequency effects channel is for audio tracks specifically intended for deep, low-pitched sounds ranging from 3-120 Hz.
Holes on Theater Screens?
A straight reason is that there are speakers behind the screens for the Surround Sound to work, It's both genius and space saving for cinemas to operate speakers this way. A typical cinema screen has about 5,500 perforations per square foot, also there were horn-driven speakers for the loud and clear experience. These holes were each 0.047 inches in diameter, even if you stand in front of the screen, it's barely noticeable.
Holes on Theater Screens?
A straight reason is that there are speakers behind the screens for the Surround Sound to work, It's both genius and space saving for cinemas to operate speakers this way. A typical cinema screen has about 5,500 perforations per square foot, also there were horn-driven speakers for the loud and clear experience. These holes were each 0.047 inches in diameter, even if you stand in front of the screen, it's barely noticeable.
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