Optimized nonlocal active sound control in frequency domain

In the active sound control problem considered in paper, a quite arbitrary closed region is acoustically shielded from ambient noise generated outside via implementation of secondary sources which are situated at perimeter domain to be protected. It presumed that information available for operation only limited by acoustic field can measured on surface around region. The becomes much more complicated if there desired inside this case input determined contributions noise, and controls. supposed total makes statement general realistic. As output, it required attenuate while preserving unaffected. To tackle problem, recently developed algorithm based nonlocal applied. From point view practical realization, number microphones loudspeakers should minimized. We propose first time some ways essentially optimize distribution patterns controls sensors with preservation sound. Numerical experiments carried out attenuation cube study trade-off between level reduction demonstrated efficiently realized reasonable shown, two per wavelength achieved exceeds 10 dB. This result matches optimal local when any absent.