Active noise control systems, devices, and methods are disclosed herein. Anti-snoring systems can include a first pillow unit having at least one error microphone and at least one speaker, at least one reference microphone configured to capture sound produced proximate to the at least one reference microphone, and a control unit operatively coupled to the first pillow unit and the at least one reference microphone. In some aspects, the control unit can be configured to produce an anti-noise in the at least one speaker disposed in the first pillow unit by processing signals received from the at least one error microphone and the at least one reference microphone using gated dynamic adjustments such that the anti-noise cancels any sound produced proximate the at least one reference.

Acoustic noise reduction (ANR) headphones described herein have current detection circuitry that is used to detect current consumed by ANR circuitry as a result of pressure changes due to a tapping of a headphone. Tapping may be performed to change an audio feature or operating mode. The current detection circuitry senses a characteristic of the current that can be used to determine an occurrence of a tap event. Examples of a characteristic include an amplitude, waveform or duration of the sensed current. Advantageously, the ANR headphones avoid the need for control buttons to initiate the desired changes to the audio feature or operating mode. Error detection circuitry included in the ANR headphones can distinguish between a valid tap events and an occurrence of a different type of event that may otherwise be improperly be interpreted as a tap event.

Active noise control systems, devices, and methods are disclosed herein. Anti-snoring systems can include a first pillow unit having at least one error microphone and at least one speaker, at least one reference microphone configured to capture sound produced proximate to the at least one reference microphone, and a control unit operatively coupled to the first pillow unit and the at least one reference microphone. In some aspects, the control unit can be configured to produce an anti-noise in the at least one speaker disposed in the first pillow unit by processing signals received from the at least one error microphone and the at least one reference microphone using gated dynamic adjustments such that the anti-noise cancels any sound produced proximate the at least one reference.

A method and system for a noise cancellation comprises an amplifier in communication with the three or more speakers disposed in an area. A system controller produces a driver signal for each of the speakers in response to a signal from at least one microphone detecting sound in the area and communicates the driver signals to the amplifier. The amplifier drives each speaker with the driver signal produced for that speaker. In response to the driver signals, the speakers emit sound that combined produces a substantially uniform sound pressure field for a particular zone within the area. The substantially uniform sound pressure field produced by the speakers has a magnitude and phase adapted to attenuate a noise field in the area corresponding to the sound detected by the at least one microphone.

Acoustic noise reduction (ANR) headphones described herein have current detection circuitry that is used to detect current consumed by ANR circuitry as a result of pressure changes due to a tapping of a headphone. Tapping may be performed to change an audio feature or operating mode. The current detection circuitry senses a characteristic of the current that can be used to determine an occurrence of a tap event. Examples of a characteristic include an amplitude, waveform or duration of the sensed current. Advantageously, the ANR headphones avoid the need for control buttons to initiate the desired changes to the audio feature or operating mode. Error detection circuitry included in the ANR headphones can distinguish between a valid tap events and an occurrence of a different type of event that may otherwise be improperly be interpreted as a tap event.

A method of enabling a hearer to hear desired sound while also being able to be aware of ambient sound, comprises providing a first non-sound signal representative of said desired sound, deriving a second non-sound signal from said ambient sound, combining the first and second non-sound signals in providing a third non-sound signal, and converting said third non-sound signal into sound.

A method of removing noise and an electronic device thereof are provided. The electronic device includes a speaker, a first sensor configured to output a first signal by obtaining noise around the electronic device, a second sensor configured to output a second signal by detecting vibrations around the electronic device, and a controller configured to determine whether the second signal satisfies a condition of not exceeding a certain threshold value, and output an acoustic signal to be output through the speaker based on the first signal according to a result of the determination.

In an active noise reduction device, in order to solve this problem, a control block determines a level of a reference signal detected by a level detection unit. If determining that the level of the reference signal is small, the control block decreases a level of a cancel signal. This operation suppresses generation of an abnormal sound even if a level of a noise is small.

A method and system for a noise cancellation comprises an amplifier in communication with the three or more speakers disposed in an area. A system controller produces a driver signal for each of the speakers in response to a signal from at least one microphone detecting sound in the area and communicates the driver signals to the amplifier. The amplifier drives each speaker with the driver signal produced for that speaker. In response to the driver signals, the speakers emit sound that combined produces a substantially uniform sound pressure field for a particular zone within the area. The substantially uniform sound pressure field produced by the speakers has a magnitude and phase adapted to attenuate a noise field in the area corresponding to the sound detected by the at least one microphone.

Provided is a vehicle vibration and noise reduction system that allows the stiffness of the suspension system to be varied while ensuring a favorable noise canceling performance under all conditions. A variable elastic member (4) is incorporated in a vehicle suspension system, and a noise control unit (56) causes a canceling sound to be emitted from a loudspeaker (32) according to a reference signal obtained from a strain sensor (31) provided on the variable elastic member and an error signal obtained from a noise detection unit (33) for detecting noises in the passenger compartment of the vehicle. The noise control unit is configured to change a noise canceling property of the noise control unit depending on the elastic modulus of the variable elastic member.