The disclosed computer-implemented method may include accessing environment information identifying an undesired sound source within an environment. The method may further include determining, based on the accessed environment information, a spatial location of the undesired sound source in the environment that is to be attenuated using an active noise cancelling (ANC) signal. The method may also include forming a microphone beam, using two or more microphones, directed at the determined spatial location, where the microphone beam is configured to capture audio information from the determined spatial location. Still further, the method may include generating an ANC signal using the audio information captured using the microphone beam, and playing back the generated ANC signal to attenuate the undesired sound source at the determined spatial location. Various other methods, systems, and computer-readable media are also disclosed.

A baby monitor system with white noise filtering comprises a camera unit and a monitor unit, wherein the camera unit is predefined soothing sounds and play at least one of the predefined soothing sounds for baby; the camera unit records the mixture sound of baby, ambient noises and white noises and transforms the mixture sound to sound features, wherein the white noises at least include the soothing sounds and stationary noise; the recorded sound features are compared to local audio features of the predefined soothing sounds; if there are matching features between the recorded sound features and the local audio features, removing the matching features from the recorded sound features; the stationary noise features are extracted and removed from the recorded sound features; the camera unit outputs the recorded mixture sound without the white noise to the monitor unit.

Headphones includes a pair of cups, each housing a speaker to be positioned over an ear of a user, a microphone, a processor, an actuator to move a member of at least one of the cups to uncover at least a portion of the ear of the user to expose the user to ambient sound, a user control to active a training mode of the headphones in which the processor operates the microphone to record relevant sounds occurring when the training mode is activated, the processor to subsequently analyze ambient sounds external to the headphones that are received by the microphone and compare those ambient sounds to the recorded relevant sounds and the processor to selectively activate the actuator to uncover at least a portion of the ear of the user to expose the user to ambient sound in response to determining that the ambient sounds match the relevant sounds.

The technology described in this document can be embodied in a method that includes receiving an input signal representing audio captured by a microphone of an active noise reduction (ANR) headphone, processing, by one or more processing devices, a portion of the input signal to determine a noise level in the input signal, and determining that the noise level satisfies a threshold condition. The method also includes, in response to determining that the noise level satisfies the threshold condition, generating an output signal in which ANR processing on the input signal is controlled in accordance with a target loudness level of the output signal, and driving an acoustic transducer of the ANR headphone using the output signal.

A transfer function of a first variable filter is updated to output, from an output of a first seat microphone, a cancel sound that minimizes a level of a signal obtained by subtracting an output of an auxiliary filter that generates a correction signal for correcting a difference between positions of the first seat microphone and the first seat. In the ICC mode in which the uttered voice of the user in the first seat is output from a second seat speaker, a selector sets an uttered voice Dp output from the second seat speaker as an input to the first variable filter, and in the non-ICC mode, the selector sets an output sound of a second seat audio source output from the second seat speaker as an input to the first variable filter. The uttered voice Dp is generated by removing a component of the cancel sound from the output of the first seat microphone.

Embodiments of active noise control (ANC) headphones and operating methods thereof are disclosed herein. In one example, a headphone for ANC includes a speaker, an internal microphone, a processor, and a filter function module. The speaker is configured to play an audio based on a first audio source signal. The internal microphone is configured to obtain a mixed audio signal comprising a noise signal and a second audio source signal based on the audio of interest played by the speaker. The processor is configured to determine a current system parameter of the ANC headphone based on the mixed audio signal at a first time point and determine a current parameter of a filter function module based on the current system parameter of the ANC headphone and pre-tested data. The filter function module is to perform ANC based on the determined current parameter of the filter function module.

An audio system and method for generating improved augmented hearing effects in real-time. The system includes a wearable audio device arranged to obtain audio that includes a voice signal associated with a user and an environmental signal associated with other audio picked up by the wearable audio device that does not includes the user's voice. In some implementations, at least one processor of the wearable audio device is configured to isolate the voice signal from the environmental signal such that augmented hearing effects can be applied to the voice signal and/or the environmental signal, independently. In some implementations, augmented hearing effects are designated by a signal augmentation profile generated or stored in the wearable audio device such that the total time between receipt of the audio signal and the modifications and/or transformations to the respective audio signals does not exceed 100 ms.

An audio system and method for generating improved augmented hearing effects in real-time. The system includes a wearable audio device arranged to obtain audio that includes a voice signal associated with a user and an environmental signal associated with other audio picked up by the wearable audio device that does not includes the user's voice. In some implementations, at least one processor of the wearable audio device is configured to isolate the voice signal from the environmental signal such that augmented hearing effects can be applied to the voice signal and/or the environmental signal, independently. In some implementations, augmented hearing effects are designated by a signal augmentation profile generated or stored in the wearable audio device such that the total time between receipt of the audio signal and the modifications and/or transformations to the respective audio signals does not exceed 100 ms.

In the method according to the invention for actively suppressing the occlusion effect during the playback of audio signals by means of headphones or a hearing aid, a sound signal occurring from outside is captured by means of at least one outer microphone of the headphones or the hearing aid. A voice signal is captured by means of at least one additional microphone. The dry component of the captured voice signal is estimated, the dry component of the captured voice signal being the component of the captured voice signal without reverberation caused by the surrounding space. By means of a filter, a voice component is extracted from the outer sound captured using the at least one outer microphone. The extracted or produced voice component is output by means of a loudspeaker of the headphones or the hearing aid.

A method of reducing signals associated with one or more classes of unwanted noise is disclosed which includes choosing one or more classes as noise to be cancelled while allowing the remainder of classes amongst a plurality of classes to pass through, dividing an incoming time-varying signal into a plurality of snippets having a single or a plurality of durations, transforming each snippet into an associated frequency spectrum, thus generating a plurality of spectra, for each spectrum of the plurality of spectra, identifying presence of the one or more classes chosen as noise, for each identified class of noise, multiplying a 180° phase-shifted version of a frequency signal associated with the identified class of noise by a frequency spectrum of the incoming signal, thereby generating an associated frequency-domain noise-cancelled spectrum, inverse transforming the frequency-domain noise-cancelled spectrum into a time-varying noise-cancelled signal, and outputting the time-varying noise-cancelled signal.