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After the war, Theodore Case and Earl I. Sponable collaborated with fellow wireless communications pioneer Lee de Forest, inventor of the Audion tube, to apply their optical sound system to motion pictures. De Forest had been granted general patents for a sound-on-film process in 1919, though it was the Case Research Lab's inventions that made ...
Label for 2.0 sound (stereo) In common usage, a "stereo" is a two-channel sound reproduction system, and a "stereo recording" is a two-channel recording. This is cause for much confusion, since five (or more)-channel home theater systems are not popularly described as "stereo", but instead as "surround". [clarification needed (see talk)]
Modern home cinema systems typically augment the audio output from a DVD player or Blu-ray player with a multi-channel power amplifier and anywhere from two speakers and a stereo power amp (for stereo sound) to a 5.1 channel amplifier and five or more surround sound speaker cabinets (with a surround sound system).
The Amazon rainforest, [a] also called Amazon jungle or Amazonia, is a moist broadleaf tropical rainforest in the Amazon biome that covers most of the Amazon basin of South America. This basin encompasses 7,000,000 km 2 (2,700,000 sq mi), [ 2 ] of which 6,000,000 km 2 (2,300,000 sq mi) are covered by the rainforest . [ 3 ]
The format may vary. It might be a video of a teacher speaking to the camera, photographs and text about the topic or some mixture of these. Animated video lessons, in particular, use engaging visuals and simplified explanations to help break down complex topics, making them especially effective in subjects like Science or Math. [1]
President Joe Biden made a historic visit to the Amazon on Sunday and made a call for future generations to protect the wildlife in the region. Biden also pointed out that his successor, president ...
audio systems and dictation machines, mobile devices and phones; household machinery and air conditioners; In particular, the air conditioning business of Sanyo and Fisher brands was unified in 2000 under the Sanyo Electric Air Conditioning Co. Ltd. scheme, [14] to end up eventually in 2011 with the buyout from Panasonic.
President Biden made a historic visit to the Amazon rainforest Sunday to view the Amazon River and the ongoing effects of climate change. With his visit Sunday, Biden became the first sitting ...