Would it be feasible to quiet an outdoor deck by using noise-cancelling headphone circuitry but outputting the result through loudspeakers? - Quora
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Jbl Trip Wireless Bluetooth Speaker Mini Car Portable Speakers Travel Driving Music Speaker Sound Noise Cancelling Outdoor - Speakers - AliExpress
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Amazon.com: Polk Audio Atrium 4 Outdoor Speakers with Powerful Bass (Pair, White), All-Weather Durability, Broad Sound Coverage, Speed-Lock Mounting System : Electronics
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