Methods and apparatus for harmonic source enhancement are disclosed herein. An example apparatus includes an interface to receive a media signal. The example apparatus also includes a harmonic source enhancer to determine a magnitude spectrogram of audio corresponding to the media signal; generate a time-frequency mask based on the magnitude spectrogram; and apply the time-frequency mask to the magnitude spectrogram to enhance a harmonic source of the media signal.

A sound-data-interactive dynamic adaptive facade module system is provided. The sound-data-interactive dynamic adaptive facade module system changes a shape of the sound-data-interactive dynamic adaptive facade module system by moving interactively according to sound values and by gaining a sound shield feature by enlarging a surface. The sound-data-interactive dynamic adaptive facade module system includes: a steel frame structure, a coating material, a vertical steel carrier profile, a coupler, a vertical and horizontal steel carrier joint profile, a metal pinion plate, a bearing, a bush cap, a servo motor, and servo motor connection cables.

A vehicle-approach notification device includes a sound emitter and at least two ducts. The sound emitter is provided in the vehicle, has an aperture, and is configured to emit a notification sound from the aperture to outside the vehicle. The at least two ducts are provided in the vehicle, have different lengths, and each have an end communicating with the aperture.

Active noise cancellation method is provided, including: when the headset is in an ANC working mode, obtaining a first group of filtering parameters, and performing noise cancellation by using the first group of filtering parameters. The first group of filtering parameters is one of N.sub.1 groups of filtering parameters prestored in the headset. The N.sub.1 groups of filtering parameters are respectively used to perform noise cancellation on ambient sound in N.sub.1 leakage states. The N.sub.1 leakage states are formed by the headset and N.sub.1 different ear canal environments. In a current wearing state of the headset, for same ambient noise, noise cancellation effect obtained when the first group of filtering parameters is applied to the headset is better than noise cancellation effect obtained when another filtering parameter in the N.sub.1 groups of filtering parameters is applied to the headset. N.sub.1 is a positive integer greater than or equal to 2.

Adjustment of active noise cancellation (ANC) systems can include determining a noise within a vehicle; detecting a movement of a head of a listener; adjusting one or more parameters of the ANC system based at least on the noise and the movement of the head of the listener; determining an anti-noise based at least on the adjusted one or more parameters; and outputting the anti-noise.

A noise abatement system for internal combustion engines comprising: a containment body (12) equipped with an inlet hole (6) for the entry of exhaust gases from an internal combustion engine, a plurality of expansion chambers (10) placed in sequence and separated by parallel dividing partitions (13), each equipped with a through-hole (4) for the passage of gases placing in fluid communication two neighboring expansion chambers (10); said expansion chambers (10) having two opposing through-holes (4), one as gas inlet and one as gas outlet. A rotating shaft (9) is integrated in a rotating turbine (1), along an axis comprising the center of gravity of the expansion chambers (10) up to an opposite end of the containment body (12), said rotating shaft (9) having placed around said axis and on said shaft (9) rotary fins (3) which open and close the through-holes (4) between expansion chambers (10) alternately and generating a swirling movement of the flow of gas entering each expansion chamber (10).

A noise abatement system for internal combustion engines comprising: a containment body (12) equipped with an inlet hole (6) for the entry of exhaust gases from an internal combustion engine, a plurality of expansion chambers (10) placed in sequence and separated by parallel dividing partitions (13), each equipped with a through-hole (4) for the passage of gases placing in fluid communication two neighboring expansion chambers (10); said expansion chambers (10) having two opposing through-holes (4), one as gas inlet and one as gas outlet. A rotating shaft (9) is integrated in a rotating turbine (1), along an axis comprising the center of gravity of the expansion chambers (10) up to an opposite end of the containment body (12), said rotating shaft (9) having placed around said axis and on said shaft (9) rotary fins (3) which open and close the through-holes (4) between expansion chambers (10) alternately and generating a swirling movement of the flow of gas entering each expansion chamber (10).

According to an embodiment, a sound emitting apparatus includes a helical hollow tube and at least three sound wave sources. The helical hollow tube helically extends in a circumferential direction to form an annular shape as a whole. The first helical hollow tube includes a plurality of openings. The at least three sound wave sources are coupled to the first helical hollow tube and are configured to supply a sound wave to the first helical hollow tube.

Embodiments relate to a vehicle, an apparatus, a method and a computer program for sharing sound data. The apparatus (10) for sharing sound data from a vehicle (100) comprises one or more interfaces (12) configured to communicate in a mobile communication system (300) and one or more microphones (16) configured to record sound data. The apparatus (10) further comprises a control module (14), which is configured to control the one or more interfaces (12) and the one or more microphones (12). The control module (14) is further configured to record sound samples using the one or more microphones (16), and to communicate information on the sound samples to another vehicle (200) using the one or more interfaces (12).

Embodiments relate to a vehicle, an apparatus, a method and a computer program for sharing sound data. The apparatus (10) for sharing sound data from a vehicle (100) comprises one or more interfaces (12) configured to communicate in a mobile communication system (300) and one or more microphones (16) configured to record sound data. The apparatus (10) further comprises a control module (14), which is configured to control the one or more interfaces (12) and the one or more microphones (12). The control module (14) is further configured to record sound samples using the one or more microphones (16), and to communicate information on the sound samples to another vehicle (200) using the one or more interfaces (12).