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The first ones were mechanically based and of very low resolution, sometimes with no sound. Later TV systems were electronic, and usually mentioned by their line number: 375-line (used in Germany, Italy, US), 405-line (used in the UK), 441-line (used in Germany, France, Italy, US) or 567-line (used in the Netherlands). These systems were mostly ...
When operating a device such as a home theater system, computer, television, or CD player, they may wish to have the volume turned down all the way before doing anything that would cause the speakers to emit sound, so that once the command to produce sound is given, the user can raise the volume of the speakers to a comfortable listening level.
Lori has been addicted to sleeping with her blow dryer since she was eight years old. Although she finds the heat and sound comforting, Lori risks the chance of burning her skin severely or worse, starting an electrical fire. Even knowing the risks, she still refuses to sleep one night without her blow dryer on.
The definition of sound, simplified, is a hearable noise. The tree will make a sound, even if nobody heard it, simply because it could have been heard. The answer to this question depends on the definition of sound. We can define sound as our perception of air vibrations. Therefore, sound does not exist if we do not hear it.
Individuals with exploding head syndrome hear or experience loud imagined noises as they are falling asleep or are waking up, have a strong, often frightened emotional reaction to the sound, and do not report significant pain; around 10% of people also experience visual disturbances like perceiving visual static, lightning, or flashes of light.
The Southern Television broadcast interruption was a broadcast signal intrusion that occurred on 26 November 1977 in parts of southern England in the United Kingdom. The audio of a Southern Television broadcast was replaced by a voice claiming to represent the "Ashtar Galactic Command", delivering a message instructing humanity to abandon its weapons so it could participate in a "future ...
Television has also been credited with changing the norms of social propriety, although the direction and value of this change are disputed. Milton Shulman, writing about television in the 1960s, wrote that "TV cartoons showed cows without udders and not even a pause was pregnant," and noted that on-air vulgarity was highly frowned upon ...
A tic is a sudden and repetitive motor movement or vocalization that is not rhythmic and involves discrete muscle groups. [1] [2] [3] Tics are typically brief and may resemble a normal behavioral characteristic or gesture. [4] Tics can be invisible to the observer, such as abdominal tensing or toe crunching.
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