FIELD: acoustics.
SUBSTANCE: system for damping spectrum of acoustic noise includes series-arranged on wall of channel acoustic radiator, resonance Helmholtz cell with resonance frequency equal to that of acoustic radiator, and a sensor of acoustic pressure at output of channel connected to acoustic radiator by feedback. Acoustic radiator used is an active mono-frequency piezoelectric radiator with a fixed radiation frequency, and acoustic pressure sensor is designed to control amplitude of radiation of piezoelectric radiator for different noise spectra.
EFFECT: disclosed is a system for damping spectrum of acoustic noise.
4 cl, 4 dwg
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