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A fourth major contender for the sound film market - Warner Brothers' Vitaphone sound-on-disc system which synchronized large-size (16") phonographic records with a film's projector was used on early talkies, such as their' 1927 hit The Jazz Singer (which was marketed as being "all singing" though the talking was sporadic, used in only several ...
Some virtual surround systems work by directing a strong beam of sound to reflect off the walls of a room so that the listener hears the reflection at a higher level than the sound directly from the loudspeaker. One example of this technology is a commercially available Digital Sound Projector by Cambridge Mechatronics (formerly 1 Ltd). It ...
Sound from ultrasound is the name given here to the generation of audible sound from modulated ultrasound without using an active receiver. This happens when the modulated ultrasound passes through a nonlinear medium which acts, intentionally or unintentionally, as a demodulator .
In the 2020s, a home cinema system typically uses a large projected image from a video projector or a large flat-screen high-resolution HDTV system, a movie or other video content on a DVD or high-resolution Blu-ray disc, which is played on a DVD player or Blu-ray player, with the audio augmented with a multi-channel power amplifier and ...
A soundbar, sound bar or media bar is a type of loudspeaker that projects audio from a wide enclosure. It is much wider than it is tall, partly for acoustic reasons, and partly so it can be mounted above or below a display device (e.g. above a computer monitor or under a home theater or television screen).
The most prevalent current method of recording analogue sound on a film print is by stereo variable-area (SVA) recording, a technique first used in the mid-1970s as Dolby Stereo. A two-channel audio signal is recorded as a pair of lines running parallel with the film's direction of travel through the projector's screen.
There were five speakers behind the screen, two on the side and back of the auditorium with a sound engineer directing the sound between the surround speakers according to a script. The projectors and sound system were synchronized by a system using selsyn motors.
A long-range acoustic device (LRAD), acoustic hailing device (AHD) or sound cannon is a specialized loudspeaker that produces sound at high power for communicating at a distance. It has been used as a method of crowd control , which has caused permanent hearing damage , having an extremely high decibel capacity (up to 160 dB measured at one ...
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