Noise abatement within a signal stream containing unwanted signal referred to as noise is performed by acquiring a digitized noise signal and using a digital processor circuit to subdivide the acquired noise signal into different frequency band segments and thereby generate a plurality of segmented noise signals. Then individually for each segmented noise signal, the processor shifts in time the segmented noise signal by an amount dependent on a selected frequency of the segmented noise signal to produce a plurality of shifted segmented noise signals. The precise time shift applied to each noise segment considers the frequency content of the segment and the system processing time. Individually for each segmented noise signal, amplitude scaling is applied. The shifted and amplitude-scaled segmented noise signals are then combined to form a composite anti-noise signal which is output into the signal stream to abate the noise through destructive interference.

A sound input/output device for a vehicle includes: microphones that are provided within a vehicle cabin; a plurality of directional speakers that are provided within the vehicle cabin, and that output sound to respective seats; an output position specifying section that specifies a seat that is an output destination from a voice collected by one or more of the microphones or from input from an utterer of a voice; and an output control section that outputs sound from one or more of the speakers to a seat specified by the output position specifying section.

An apparatus and method are presented for an active noise control system with a selector mechanism to select an appropriate reference signal for an active noise control algorithm responsive to several noise sources, some of which generate may sounds intermittently.

Systems and methods are provided for generating destructive interference signals for use in active noise cancellation in an interior setting of an urban environment. The system employs a combination of conventional ANC and -predictive state estimation to generate destruction interference sound waves using a window pane to counteract urban noises.

An active noise control (ANC) headrest comprises a speaker configured to produce antinoise that destructively interferes with frequencies of ambient sound, and a microphone configured to receive feedback comprising a combination of the antinoise and the ambient sound. The headrest further comprises a position sensor configured to detect a position of a flange to which the speaker is mounted relative to a center section of the headrest. The headrest further comprises processing circuitry configured to control the speaker to produce the antinoise based on the feedback and the position detected by the position sensor.

Noise abatement within a signal stream containing unwanted signal referred to as noise is performed by acquiring a digitized noise signal and using a digital processor circuit to subdivide the acquired noise signal into different frequency band segments and thereby generate a plurality of segmented noise signals. Then individually for each segmented noise signal, the processor shifts in time the segmented noise signal by an amount dependent on a selected frequency of the segmented noise signal to produce a plurality of shifted segmented noise signals. The precise time shift applied to each noise segment considers the frequency content of the segment and the system processing time. Individually for each segmented noise signal, amplitude scaling is applied. The shifted and amplitude-scaled segmented noise signals are then combined to form a composite anti-noise signal which is output into the signal stream to abate the noise through destructive interference.

A sound making device and system for generating white noise is disclosed. The sound making device generally includes a substantially dome-shaped device that includes an outer acoustic shell and an inner acoustic shell mounted atop a base tray. Both the outer acoustic shell and inner acoustic shell have slots (or openings) that overlap to create apertures through which rushing air can pass. The amount of slot overlap is variable. Further, a variable speed fan is arranged inside the outer acoustic shell and inner acoustic shell for forcing airflow out of the apertures. The sound making device also includes a controller and user interface for adjusting the speed of the fan. Further, a sound making system is provided that includes the sound making device in combination with a mobile app.

Systems and methods for performing noise reduction in a vehicle comprising a noise reduction system and a plurality of zones are herein provided. A noise reduction criterion for the vehicle is obtained. A first one of the plurality of zones for which noise reduction is to be performed is determined, based on the noise reduction criterion. The noise-reduction system is controlled to perform noise reduction in the first zone, wherein performing noise reduction in the first zone causes the noise reduction system to effect a resultant adjustment in noise level in at least a second one of the plurality of zones.

A system for controlling an engine tone by an artificial intelligence based on a sound quality index of a vehicle may include a sound output device for generating a reinforcing sound to reinforce an engine sound of the vehicle; an engine characteristic measurement sensor for measuring sound source characteristics of the engine sound; an interior noise measurement sensor for detecting interior noise of the vehicle; a signal processing controller that receives signals from the engine characteristic measurement sensor in real time and controls the sound output device such that the engine sound reaches a target tone; and a tone control operation unit connected to the signal processing controller to optimize the sound quality index such that the engine sound reaches the target tone through the artificial intelligence.

Systems and methods are provided for an active noise cancellation system which employs a combination of an active noise cancellation techniques and predictive state estimation to generate destructive interference audio signals that are propagated by an interior surface of a room to counteract urban noises in an exterior environment of the room.