A personal audio device, such as a wireless telephone, includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal from an output of a microphone that measures ambient audio. The anti-noise signal is combined with source audio to provide an output for a speaker. The anti-noise signal causes cancellation of ambient audio sounds that appear at the microphone. A processing circuit estimates a level of background noise from the microphone output and sets a power conservation mode of the personal audio device in response to detecting that the background noise level is lower than a predetermined threshold.

Sound reduction includes receiving a reference signal corresponding to undesired sound present in the target space, and producing, based on the reference signal, a cancelling signal representative of the undesired sound present in the target space. Sound reduction further includes producing, based on the cancelling signal, sound to destructively interfere with the undesired sound present in the target space, and delaying at least one of the reference signal and the cancelling signal to reduce or compensate for runtime differences between signal paths that transfer the reference signal to the target space.

A vehicle includes at least one sensor and a body having an exterior portion and an interior portion. The sensor is configured to detect noise existing in the exterior portion and the interior portion, and to output at least one noise signal indicative of the detected noise. The vehicle further includes at least one noise cancellation and enhancement (NCE) controller and an automotive audio bus (A2B) interface. One or more of the NCE controllers are configured to perform at least one noise management signal processing operation based on the at least one noise signal. The automotive audio bus (A2B) interface receives the at least one noise signal and delivers the at least one noise signal to the at least one NCE controller.

A noise-cancelling system includes headset for generating a feedback signal for noise-cancellation in response to sound externally generated from the headset. An encoded microphone signal is generated in response to the first feedback signal. An audio generator can be used to generate a noise-cancellation signal in response to the encoded microphone signal and to generate an electronic audio signal in response to the encoded microphone signal and a first output audio signal. An audio connector is provided to couple the encoded microphone signal from the headset to the audio generator and to couple the first electronic audio signal to the headset.

A system and method for converting a passive protector earmuff to a communication and/or active noise reduction (ANR) headset include mounting active components to a frame subassembly configured for insertion into the passive earcup to divide the earcup volume into a front cavity without additional passive leak paths and a back cavity having a volume that improves speaker/driver power efficiency with a resistive vent to atmosphere. An earcup having an external shell includes a frame configured for positioning within the external shell and having a first support adapted to contact an interior of the shell and a second circumferential support cooperating with a seal to contact an ear seal plate of the earcup to form the front and back cavities. The frame may support a speaker between the front and back cavity, and secure circuitry within the back cavity.

An electronic device includes a communication module, and a processor. The processor is configured to identify context information. The processor is also configured to select a specific task corresponding to the context information from among predetermined inference tasks relating to processing of an audio signal The processor is further configured to select an external electronic device, which is to process the specific task, from among external electronic devices that are establishing a communication connection to the electronic device. Additionally, the processor is configured to assign processing of the specific task to the external electronic device.

The embodiments of the present disclosure disclose an earphone with antenna peripherals and an audio playback method. A specific implementation of the earphone with antenna peripherals comprises a sound cavity assembly, a battery assembly, and an antenna ear handle, wherein the sound cavity assembly includes a front sound cavity and a rear sound cavity, an earphone motherboard and a speaker are arranged between the front sound cavity and the rear sound cavity, the front sound cavity is provided with a sound outlet; the battery assembly includes a front battery cavity and a rear battery cavity, the front battery cavity and the rear battery cavity are connected, and a battery is arranged between the front battery cavity and the rear battery cavity; the sound cavity assembly and the battery assembly are connected through the antenna ear handle, and the earphone motherboard and the battery are connected through a power cord.

The present disclosure provides an active noise control audio device, method and storage medium. The device includes: a speaker, a microphone, an analog filter, and a processing circuit. The speaker used to generate a noise reduction sound; the microphone used to collect an environmental noise and the noise reduction sound and generate a first analog signal; the analog filter used to provide a gain for the first analog signal and to generate a second analog signal, the second analog signal driving the speaker to generate the noise reduction sound; and the processing circuit used to send a control instruction to the analog filter to adjust the gain and a phase shift of the analog filter according to the first analog signal and the second analog signal.

A low-delay hybrid noise reduction system includes a reference audio receiving device, an error audio receiving device, an audio output device, and an audio processing device. The audio processing device includes a feedforward noise reduction filter module, a feedback noise reduction filter module, and a mixer. The feedforward noise reduction filter module includes a feedforward least mean squares (LMS) filter, a low-stage finite impulse response (FIR) filter, and 1st to Nth-stage biquad filters. The 1st to Nth-stage biquad filters is set on the input end of the low-stage finite impulse response filter to perform low-delay filtering on the reference source audio signal received and outputs to the low-stage FIR filter so as to output the feedforward noise reduction signal through the low-stage FIR filter.

The invention provides an active noise reduction system which may be self-contained within a headset of the system, wherein circuitry within the system applies an active noise reduction profile to a signal to the speakers in the headset, to provide active noise reduction to the user of the headset, the system being arranged to receive power both from a power supply external to the system and from a battery of the system and to automatically modify the active noise reduction applied, in dependence on whether or not the system is connected to an external power supply.