7.1 headphones how do they work

Although that system was impressive, the concept proved too complex and expensive for most theaters. Consequently, film surround sound died out completely by the s. Starting with the release of Dolby Stereo in , and no doubt helped massively by the success of Star Wars , Dolby drove the mass adoption of surround sound in theaters throughout the s and s.

Over that period it iterated from the 4-channel Dolby SR, to the 6. Upping the ante once more, the Dolby Atmos immersive sound system was unveiled in , which added height information via ceiling-mounted speakers. After some attempts to push 4-channel quadraphonic sound equipment into the home market in the s, surround sound really arrived in living rooms in with the introduction of 3-channel Dolby Surround. This was upgraded in , with Dolby Pro Logic for a total of four audio channels.

Photo by Chauhan Moniz. Home surround sound went digital in Just like the full theater version, home Dolby Digital is a 5. The competing DTS system launched as a home version a year later. Dolby Atmos home theaters are compatible with conventional 5. For example, a 7. Photo by Blaz Erzetic. We only have two ears, but we can differentiate between sounds coming from in front and from behind, as well as left from right, above, and below without even moving our heads.

Ever wondered how we do this? Our head-related transfer function HRTF refers to the effect our shoulders, head, and outer ears have on sound waves coming from different sources before they encounter our eardrums. Those physical interactions impact the levels, timing, and phase relationships of the different frequency content of the sounds we hear.

As part of our hearing system, our brains have learned to decode all those changes to decipher where the sound likely originated in the space around us. If you placed tiny microphones inside your ears and captured the signals, they would include the effect of your HRTF. You would have a binaural recording that works perfectly for you when played back over headphones. In fact, even with a generic HRTF created using a dummy head or person-shaped object, the effect can still be quite impressive.

A person-shaped object. Not creepy at all. Photo by Viktor Talashuk. By o btaining and reproducing these signals in a controlled way over headphones, you can reproduce an auditory ev ent in space and experience it in an extremely lifelike way. So 2-channel recording can capture surround sound. Also, many newer headsets come equipped with wireless surround sound.

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