US 9,812,113 B2
Vehicle engine harmonic sound control
Cristian M. Hera, Lancaster, MA (US)
Assigned to Bose Corporation, Framingham, MA (US)
Filed by Bose Corporation, Framingham, MA (US)
Filed on Mar. 24, 2015, as Appl. No. 14/667,164.
Prior Publication US 2016/0284334 A1, Sep. 29, 2016
Int. Cl. G10K 11/16 (2006.01); G10K 11/178 (2006.01)
CPC G10K 11/178 (2013.01) [G10K 2210/1282 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An adaptive engine harmonic sound control system for a vehicle cabin, where there is an engine harmonic sound in the vehicle cabin, the engine harmonic sound having a frequency, a magnitude, and a phase, the adaptive engine harmonic sound control system for a vehicle cabin comprising:
circuitry for generating, based on an engine operating parameter, a non-zero target engine harmonic signal representative of a target engine harmonic sound in the vehicle cabin, wherein the non-zero target engine harmonic signal comprises predefined magnitude and phase targets for each of a plurality of target harmonic signals that each have a frequency;
a microphone for measuring sound in the vehicle cabin, and having an output signal;
circuitry for combining the non-zero target engine harmonic signal and the microphone output signal to create a combined signal;
an output transducer for producing an approximation of the target engine harmonic sound at a location of the microphone; and
circuitry, responsive to the combined signal, for driving the output transducer to minimize a difference between the non-zero target engine harmonic signal and the approximation of the target engine harmonic sound, by bringing the magnitude and phase of the engine harmonic sound in the vehicle cabin closer to the magnitude and phase targets of the non-zero target engine harmonic signal.