Patent ID: 8744093
Filing Date: 2014-06-03
Classification: G10K

Abstract:
1. An active vibration noise control apparatus comprising: a first canceling signal producing device for producing a first reference signal of a frequency relating to a first noise event, and producing a first canceling signal based on first simulated transfer characteristics, which simulate first transfer characteristics in which the first canceling signal output by itself passes through a sound field and is returned to itself as an error signal, wherein the first canceling signal producing device includes a first reference signal generator, a first adaptive filter, a filter coefficient updater, a phase shifter and a gain setting unit; and a second canceling signal producing device for producing a second reference signal of a frequency relating to a second noise event, and producing a second canceling signal based on second simulated transfer characteristics, which simulate second transfer characteristics in which the second canceling signal output by itself passes through the sound field and is returned to itself as an error signal, wherein the second canceling signal producing device includes a frequency detector, a second reference signal generator, a second adaptive filter, a reference signal generator and a filter coefficient updater, wherein the second canceling signal producing device adjusts the second simulated transfer characteristics corresponding to an operational state of the first canceling signal producing device.