Embodiments of this application disclose a noise cancellation apparatus and method. The noise cancellation apparatus includes a main control unit and a noise cancellation processing circuit. The main control unit determines a noise cancellation parameter based on a noise cancellation level index or a feature value for determining a matching degree between a headset and an ear canal of a user. The noise cancellation processing unit obtains an inverse phase noise of an ambient noise based on the noise cancellation parameter. After the inverse phase noise is mixed with a played downlink audio signal, the ambient noise can be canceled. In addition, because the noise cancellation parameter is determined from a preset noise cancellation parameter library based on the received or autonomously determined noise cancellation level index, instead of being uniformly configured, a noise cancellation level can be flexibly adjusted, thereby improving a noise cancellation effect and user experience.

Embodiments of the present disclosure provide an audio processing method, an audio processing apparatus and a device, the method includes: obtaining a first drive electrical signal of an active heat dissipation apparatus; determining a target noise audio signal based on the first driving electrical signal and a first transfer function; determining a denoised audio signal based on the target noise audio signal, where the denoised audio signal is used for denoising a to-be-played audio signal. In this way, a noise signal in the to-be-played audio signal can be offset by the target noise audio signal, resulting in fewer noise signals in the played target audio signal, thereby enhancing an audio playback effect of a virtual reality device.

A feedforward ambient noise reduction arrangement includes, within a housing, a loudspeaker device for directing sound energy into an ear of a listener. Disposed externally of the housing, and positioned to sense ambient noise on its way to the listener's ear, are plural microphone devices capable of converting the sensed ambient noise into electrical signals for application to the loudspeaker to generate an acoustic signal opposing the ambient noise. Importantly, the overall arrangement is such that the acoustic signal is generated by said loudspeaker means in substantial time alignment with the arrival of said ambient noise at the listener's ear.

The disclosure includes a headset comprising one or more earphones including one or more sensing components. The headset also includes one or more voice microphones to record a voice signal for voice transmission. The headset also includes a signal processor coupled to the earphones and the voice microphones. The signal processor is configured to employ the sensing components to determine a wearing position of the headset. The signal processor then selects a signal model for noise cancellation. The signal model is selected from a plurality of signal models based on the determined wearing position. The signal processor also applies the selected signal model to mitigate noise from the voice signal prior to voice transmission.

A method for controlling a sound control device in a vehicle includes obtaining at least one of a reference signal obtained from a sensor or an error signal obtained from a sound signal of a microphone, estimating a road surface environment corresponding to a road surface on which the vehicle is traveling based on the reference signal, and adjusting a gain for generating a noise control signal having a magnitude within a preset range based on at least one of the road surface environment or the error signal.

An earpiece includes a housing including a sound output channel operatively coupled to a speaker formed within the housing. An ear canal feedback channel is formed extending alongside the sound output channel and operatively coupled to a microphone formed within the housing and a DSP operatively coupled to the microphone, the DSP including a voice activity detection module to detect a microphone audio data stream and discern between host audio data stream of audio played by the speaker and external ear canal noise captured in the microphone audio data stream at the microphone at the ear canal feedback channel. An audio processor receives the detected external ear canal noise and generate audio data descriptive of an opposite waveform to the detected external ear canal noise to playback and reduce the detected external ear canal noise.

Provided is a signal processing device that performs noise canceling by combining a feedforward method and a feedback method. A signal processing device includes: a correlation calculation unit that calculates a correlation between a first sound pickup signal by a first microphone installed outside a predetermined region and a second sound pickup signal by a second microphone installed in the predetermined region; a determination unit that determines the correlation; and a control unit that performs control based on a result of the determination. The control unit controls execution of signal processing for generating a cancellation signal to be output within the predetermined region from the first sound pickup signal and the second sound pickup signal or output of the cancellation signal.

In at least one embodiment, an active noise cancellation (ANC) system is provided. The ANC system includes at least one loudspeaker, at least one microphone, and a reference generator. The at least one loudspeaker projects anti-noise sound within a cabin of a vehicle based at least on an estimated reference signal and an anti-noise signal. The at least one microphone to provide a first error signal indicative of noise and the anti-noise sound within the cabin. The at least one filter controller programmed to receive the first error signal and the estimated reference signal; and to control at least one adaptive filter to generate the anti-noise signal based at least on the first error signal and the estimated reference signal. The reference generator is programmed to generate the estimated reference signal based at least on one of vehicle speed, temperature of a tire of the vehicle, or tire pressure.

An active noise control device controls a speaker on the basis of an error signal outputted from a detector that has detected, at a control point, a synthesized sound of a noise transmitted from a vibration source and a cancellation sound outputted from the speaker in order to cancel out the noise, and is provided with a control signal generation unit that generates a control signal for controlling the speaker by performing signal processing on a reference signal by a control filter corresponding to an error signal buffered at the end of an input buffer for buffering error signals on a time-series basis.

An audio method, system, and computer readable medium is provided that estimates an acoustic transfer function in an environment between a transducer and a microphone. An audio test signal is generated, wherein an amplitude or energy of the audio test signal is selected, across a plurality of frequency bins, at least in part, to be at least partially masked by acoustic energy in the environment. The audio test signal is provided to a transducer to be transduced into an acoustic signal in the environment. The microphone receives the acoustic signal and provides a microphone signal. The microphone signal is processed through a summing method over a predetermined time duration of three (3) seconds or longer, and the acoustic transfer function is estimated based upon the summing method.