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Subhas Chandra Bose (/ ʃ ʊ b ˈ h ɑː s ˈ tʃ ʌ n d r ə ˈ b oʊ s / ⓘ shuub-HAHSS CHUN-drə BOHSS; [12] 23 January 1897 – 18 August 1945) was an Indian nationalist whose defiance of British authority in India made him a hero among many Indians, but his wartime alliances with Nazi Germany and Imperial Japan left a legacy vexed by authoritarianism, anti-Semitism, and military failure.
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The invention of radio is a complex and disputed topic that involves many individuals and experiments. This article provides an overview of the history and development of radio technology, from the early discoveries of electromagnetic waves to the modern applications of radio communication. Learn more about the pioneers, controversies and innovations that shaped the radio industry.
Active noise-cancelling headphones use a microphone, amplifier, and speaker to pick up, amplify, and play ambient noise in phase-reversed form; this to some extent cancels out unwanted noise from the environment without affecting the desired sound source, which is not picked up and reversed by the microphone. They require a power source ...
Noise reduction is the process of removing noise from a signal. Noise reduction techniques exist for audio and images. Noise reduction algorithms may distort the signal to some degree. Noise rejection is the ability of a circuit to isolate an undesired signal component from the desired signal component, as with common-mode rejection ratio.
This can potentially lead to increased sound exposure as it reduces the signal-to-noise ratio for the mix and causes the musician to increase the levels from the IEM. Active ambient IEMs use external microphones to reproduce the ambient sound in the mix that mimics the frequency response of the open ear and may sound more natural to the performer.
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