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1992
Unwanted sound can be cancelled by adding to it sound of identical strength and opposite phase. This type of sound reduction is also called Anti-Noise or Active Noise Control and was patented by the German physicist Paul Lueg back in 1933. Although some researchers tried to make anti-noise systems work in practice, results were poor due to lack of ...
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Unwanted sound can be cancelled by adding to it sound of identical strength and opposite phase. This type of sound reduction is also called Anti-Noise or Active Noise Control and was patented by the German physicist Paul Lueg back in 1933. Although some researchers tried to make anti-noise systems work in practice, results were poor due to lack of ...
openaire +1 more source