An exemplary engine noise control includes directly picking up engine noise from an engine of a vehicle at a pick-up position to generate a sense signal representative of the engine noise, and active noise control filtering to generate a filtered sense signal from the sense signal. The control further includes converting the filtered sense signal from the active noise control filtering into anti-noise and radiating the anti-noise to a listening position in an interior of the vehicle. The filtered sense signal is configured so that the anti-noise reduces the engine noise at the listening position.

A sound control device and a method for controlling the sound control device in a vehicle. The method comprises obtaining an error signal indicating residual noise in the vehicle, and an audio signal; calculating magnitudes of low frequency components of the error signal; adjusting magnitudes of low frequency components of the audio signal according to the magnitudes of the low frequency components of the error signal; and outputting the adjusted audio signal through a speaker.

An active noise control method for a vehicle including: acquiring frequency section information corresponding to a current state of the vehicle from a lookup table that has previously stored combination information for each frequency section of a plurality of acceleration sensors for each of state variables of the vehicle; generating a virtual reference signal from reference signals of the plurality of acceleration sensors on the basis of the frequency section information; generating an active noise control signal on the basis of the virtual reference signal and an error signal; and outputting an active noise control sound based on the active noise control signal.

A method of canceling road noise includes: receiving a first signal from an acceleration sensor disposed at a vehicle and a second signal from a microphone disposed at the vehicle; monitoring, based on the first and second signals, whether an abnormal event has occurred; determining, based on a result from monitoring whether the abnormal event has occurred, a plurality of parameter values for performing adaptive filtering; and performing, based on the determined parameter values, adaptive filtering to generating an output signal for noise canceling.

Embodiments of the present disclosure provide a noise reduction method, the method includes: obtaining an acceleration signal of a mobile terminal when an audio output device is in a working state; determining, according to the acceleration signal, a vibration waveform of the mobile terminal when the mobile terminal vibrates; inverting the determined vibration waveform to obtain a noise reduction signal; and superimposing the noise reduction signal onto to-be-output audio of the audio output device. Therefore, noise generated by skeleton vibration is diminished or eliminated, so as to improve an effect of listening, by a person, to audio.

An exemplary engine noise control includes directly picking up engine noise from an engine of a vehicle at a pick-up position to generate a sense signal representative of the engine noise, and active noise control filtering to generate a filtered sense signal from the sense signal. The control further includes converting the filtered sense signal from the active noise control filtering into anti-noise and radiating the anti-noise to a listening position in an interior of the vehicle. The filtered sense signal is configured so that the anti-noise reduces the engine noise at the listening position.

Various implementations include a method of training a road noise cancelation (RNC) system for a vehicle, including: providing inputs to RNC system, the inputs obtained from: a set of ear-mounted microphones on a user, at least one transducer, an accelerometer, a set of cabin microphones in the vehicle, and a controller area network (CAN) bus, the inputs from the set of ear-mounted microphones on the user approximating a signal detected by the ears of the user; adapting a set of parameters in the RNC system defining an estimated signal detected at respective ears of the user based on the inputs; and generating at least one of the following for input during an operating mode of the RNC system: estimated ear microphone signals based on the adapted set of parameters, or a set of projection filters for use in determining an estimated ear signal at the respective ears of the user.

A noise and vibration measurement arrangement, system, and method are disclosed. The arrangement is configured to operate with an active road noise control system. The arrangement includes an energy harvester, an acceleration sensor, a signal processor, and a signal transmitter. The energy harvester obtains electrical energy from an ambient energy source. The acceleration sensor is configured to generate a sense signal. The signal processor is configured to provide a processed sense signal. The signal processor includes a normal mode of operation and an energy saving mode of operation. The signal transmitter includes a normal mode of operation and an energy saving mode. The energy controller evaluates the electrical energy from the energy harvester to operate in the energy saving mode when the electrical energy is below a predetermined energy level and to operate in the normal mode when the electrical energy is above the predetermined energy level.

A method of estimating active noise control performance of a vehicle includes performing ANC by reproducing an acoustic signal for reducing noise introduced from the outside to the inside of the vehicle through a speaker and receiving a residual signal remaining after noise reduction from a microphone, generating an estimation signal for a control signal for controlling output of the speaker such that the acoustic signal is reproduced during the ANC, generating an estimation signal for original noise before the ANC based on the residual signal and the estimation signal for the control signal, and estimating noise reduction performance based on the estimation signal for the original noise and the residual signal.

A system and method for removal of unwanted vibration noise are provided. The system may detect, by a microphone(s) of the system, at least one audio signal including audio content output from at least one speaker and other audio data from one or more other sources, or caused by the one or more other sources. The other audio data may include determined undesirable vibration noise causing distortion of the at least one audio signal. The system may determine, by at least one sensor of the system, a subset of the other audio data based in part on determining at least one motion of a user of the system, or motion of one or more other users. The system may remove, or reduce, the undesirable vibration noise from the at least one audio signal to enable output of sound associated with a modification of the at least one audio signal.