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This paper presents a real-time implementation of a cost-effective adaptive feedback Active Noise Control (FANC) method for attenuating acoustic multi-tone noise and functional Magnetic Resonance Imaging (fMRI) acoustic noise in a fMRI bore test-bed. Periodic property of the signal is used to decompose it into dominant periodic components and residual random components using linear prediction (LP)...
This paper presents an adaptive active noise control (ANC) method to remotely cancel multi-tone noise signals in a room using ultrasonic ‘AudioSpotLight’ (ASL) as the noise canceling loudspeaker. The ASL is a directional parametric array loudspeaker whose 60 kHz carrier frequency is modulated by the anti-noise signal generated by adaptive ANC algorithm. The proposed method uses no secondary path estimate...
This paper presents a cost-effective adaptive feedback Active Noise Control (FANC) method for controlling functional Magnetic Resonance Imaging (fMRI) acoustic noise by decomposing it into dominant periodic components and residual random components. Periodicity of fMRI acoustic noise is exploited by using linear prediction (LP) filtering to achieve signal decomposition. A hybrid combination of adaptive...
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