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Reference.org
Artificial crowd noise
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<p> Artificial crowd noise is pre-recorded audio that simulates the live sounds of <a href="/facts/Audiences/BtMhrVba">spectators</a>, particularly during sporting events. </p><p>Sports teams have used artificial crowd noise to simulate stadium sounds during practices to acclimate themselves to conditions they would face in actual games, and some have accused teams of using artificial crowd noise on top of in-person crowds to distract opposing teams. </p><p>Regular use of such audio grew during the <a href="/facts/COVID-19_pandemic/0xTsh7Ut">COVID-19 pandemic</a>, which required many sporting events to be played with <a href="/facts/Behind_closed_doors_(sport)/HTJCPWdg">no spectators</a> due to restrictions on gatherings or use of facilities. This audio is usually mixed to correspond with in-game events. </p>