Active noise control circuit with multiple filters connected in parallel fashion and associated method

An active noise control (ANC) circuit for generating an anti-noise signal, comprising:

• a plurality of filters, comprising:
• at least one first filter, arranged to generate at least one first filter output,
• wherein each of the at least one first filter comprises:
• at least one non-static filter;
• and
• at least one static filter, wherein the at least one non-static filter and the at least one static filter are connected in a series fashion;
• and
• at least one second filter, arranged to generate at least one second filter output, wherein each of the at least one second filter comprises:
• at least one adaptive filter;
• wherein the anti-noise signal is jointly controlled by the at least one first filter output and the at least one second filter output;
• the at least one first filter and the at least one second filter are connected in a parallel fashion;
• and a filter structure of said each of the at least one first filter is different from a filter structure of said each of the at least one second filter, where said each of the at least one first filter is a weighted static ANC filter with weighted static filter coefficients resulting from applying a weighting factor to fixed filter coefficients, and said each of the at least one second filter is an adaptive ANC filter with adaptively adjusted filter coefficients.