A method comprising: digitally acquiring a predetermined noise from a noise source ; generating a synchronization signal; electrically combining the synchronization signal with the acquired predetermined noise; broadcasting the synchronization signal by a first loudspeaker towards a predefined quiet zone , wherein said first loudspeaker is located close to said source, such that the broadcasted synchronization signal and the predetermined noise are acoustically combined; acquiring, using a microphone positioned at the predefined quiet zone: a) the acoustically-combined predetermined noise and broadcasted synchronization signal, and b) surrounding acoustical undefined noise at the predefined quiet zone; separating the broadcasted synchronization signal from the signal acquired by the microphone; separating the synchronization signal from the electrically-combined synchronization signal and predetermined noise; generating an antiphase signal based on: c) the electrically-combined synchronization signal and predetermined noise, d) the acquired acoustically-combined predetermined noise and broadcasted synchronization signal, and e) the separated broadcasted synchronization signal, f) the separated electrically-combined synchronization signal; and acoustically broadcasting the antiphase signal using a second loudspeaker , so as to substantially attenuate the noise as heard at the predefined quiet zone. digitally acquiring a predetermined noise from a noise source ; generating a synchronization signal; electrically combining the synchronization signal with the acquired predetermined noise; broadcasting the synchronization signal by a first loudspeaker towards a predefined quiet zone , wherein said first loudspeaker is located close to said source, such that the broadcasted synchronization signal and the predetermined noise are acoustically combined; acquiring, using a microphone positioned at the predefined quiet zone: a) the acoustically-combined predetermined noise and broadcasted synchronization signal, and b) surrounding acoustical undefined noise at the predefined quiet zone; a) the acoustically-combined predetermined noise and broadcasted synchronization signal, and b) surrounding acoustical undefined noise at the predefined quiet zone; separating the broadcasted synchronization signal from the signal acquired by the microphone; separating the synchronization signal from the electrically-combined synchronization signal and predetermined noise; generating an antiphase signal based on: c) the electrically-combined synchronization signal and predetermined noise, d) the acquired acoustically-combined predetermined noise and broadcasted synchronization signal, and e) the separated broadcasted synchronization signal, f) the separated electrically-combined synchronization signal; and c) the electrically-combined synchronization signal and predetermined noise, d) the acquired acoustically-combined predetermined noise and broadcasted synchronization signal, and e) the separated broadcasted synchronization signal, f) the separated electrically-combined synchronization signal; and acoustically broadcasting the antiphase signal using a second loudspeaker , so as to substantially attenuate the noise as heard at the predefined quiet zone. <EOS>