Sound reinforcement system

https://www.wikidata.org/wiki/Q829504

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Computer science 61.9M papers	Engineering 25M papers	Electrical engineering 4.8M papers	Telecommunications 4.5M papers
Electronic engineering 1.7M papers	Computer hardware 534k papers	Speech recognition 486k papers	Digital signal processing 130k papers
Speech coding 25k papers		Audio signal 19.9k papers
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Sound reinforcement system 571 papers
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