A system comprising a feedback device comprising one or more elements operable to generate an output in response to an input from a processing device, a microphone operable to capture one or more audio inputs, an input detection unit operable to detect one or more inputs to the feedback device from the processing device, and a response generation unit operable to generate a response to the detected input in dependence upon the input and at least a distance between an element associated with the corresponding output and the microphone.

A headset with automatic noise reduction mode switching is provided to enable better call experience when conducting a call. The headset comprises at least one or more earphones, one or more microphones, a processor, and an active noise cancellation circuit, connected at least with the processor. The processor is configured to determine whether a call is being conducted using the headset, and if a call is being conducted, to switch the active noise cancellation circuit from a first ANC mode to a second ANC mode.

A vehicle includes a speed detecting device provided to detect a driving speed, a pressure detecting device provided to detect a pressure applied to a brake pedal, a power information obtaining device provided to obtain power information of a power device, and a sound reproducing apparatus provided to determine whether the vehicle is in a start state or a driving state according to driving speed information detected by the speed detecting device, pressure information detected by the pressure detecting device, and the power information, control reproduction of post-combustion noise when the processor concludes that the vehicle is in the start state, control reproduction of a slip sound in response to an acceleration command or a deceleration command when the vehicle is in the driving state, and control reproduction of an acceleration sound corresponding to an acceleration force when the vehicle is accelerating in the driving state.

An audio system for an ear mountable playback device comprises a compensation filter configured to generate a third compensation signal by applying filter operations to an audio signal, and an error compensation unit configured to generate a compensated error signal on the basis of the third compensation signal and a disturbed audio signal from an error microphone. The audio system further comprises a first noise filter configured to be adapted based on the compensated error signal, and a detection unit configured to estimate the acoustic leakage condition on the basis of the first noise filter or of the disturbed audio signal and an audio output signal. The compensation filter is configured to be adapted based on the acoustic leakage condition.

According to the present invention, a diaphragm is disposed on a yoke. A recess is formed in the upper surface of the diaphragm. A first metal plate is disposed in the recess. A permanent magnet is disposed on the approximate center of the first metal plate. A second metal plate is disposed on the permanent magnet. The sizes of the first metal plate and the second metal plate are greater than that of the permanent magnet. That is, with respect to the permanent magnet, the first metal plate and the second metal plate are disposed so as to protrude outward beyond the permanent magnet in the longitudinal direction.

An audio system for a seat headrest includes N speaker(s), each configured to be integrated into a seat headrest, N being an integer greater than or equal to 1, and an audio processing device including an electronic transmission channel connected to the speaker(s) and configured to transmit at least one audio stream via the speaker(s). The audio system comprises P microphone(s), each configured to be integrated into the headrest, P being an integer greater than or equal to 1. The audio processing device further includes an electronic receiving channel connected to the microphone(s) and configured to receive at least one sound signal via the P microphone(s).

A system including an audio source device having a first microphone and a first speaker for directing sound into an environment in which the audio source device is located and a wireless audio receiver device having a second microphone and a second speaker for directing sound into a user's ear. The audio source device is configured to 1) capture, using the first microphone, speech of the user as a first audio signal, 2) reduce noise in the first audio signal to produce a speech signal, and 3) drive the first speaker with the speech signal. The wireless audio receiver device is configured to 1) capture, using the second microphone, a reproduction of the speech produced by the first speaker as a second audio signal and 2) drive the second speaker with the second audio signal to output the reproduction of the speech.

An active noise cancelling system (20) comprising: an earphone (8′) comprising: an electro-acoustic driver (11); and at least one sensing microphone (12, 13); tunable active noise cancelling circuitry (7) operative to receive a signal from the at least one sensing microphone (12, 13), the tunable active noise cancelling circuitry (7) being pre-configured in a standard tuning for a reference ear and comprising at least one noise-control filter (14, 15); and a tuning module (24) operative to configure the earphone (8′) for an individual wearer by: comparing acoustic coupling of the earphone (8′) to the individual wearer's ear with acoustic coupling to the reference ear to determine a deviation in acoustic coupling; and using the determined deviation in acoustic coupling to modify the tunable active noise cancelling circuitry (7) by a predetermined degree based on the determined deviation in acoustic coupling.

A device for detecting sound in the surroundings of an automobile, including a first structure-borne noise sensor, which is acoustically coupled to a first oscillating body at an outside of the automobile and provides a first audio signal, including a second audio signal, which represents sound from an interior of the automobile, and including a processing unit, which is configured to subtract at least the second audio signal from the first audio signal.

A fan control system applied to N fans inside a computer system is disclosed, comprising: a main microphone, a control circuitry, a wave generation circuitry and a number N of fan controllers. The control circuitry calculates a basic frequency value according to a temperature inside the computer system, and continuously updates a parameter by any known optimization algorithm according to a main audio signal from the main microphone. The wave generation circuitry generates N square waves according to the basic frequency value and the parameter. The N fan controllers respectively form and transmit N modulation signals to the N fans according to the N square waves and N tachometric signals from the N fans. The parameter is one of a frequency variation and a set of phase differences, and the N square waves have the same frequency.