The present disclosure relates to an acoustic output device including an earphone core, a controller, a Bluetooth module, and a button module. The earphone core may include at least one low-frequency acoustic driver configured to output sounds from at least two first guiding holes and at least one high-frequency acoustic driver configured to output sounds from at least two second guiding holes. The controller may be configured to direct the at least one low-frequency acoustic driver to output the sounds in a first frequency range and direct the at least one high-frequency acoustic driver to output the sounds in a second frequency range. The Bluetooth module may be configured to connect the acoustic output device with at least one terminal device. The button module may be configured to implement an interaction between a user of the acoustic output device and the acoustic output device.

The present disclosure relates to an acoustic output device including an earphone core, a controller, a Bluetooth module, and a button module. The earphone core may include at least one low-frequency acoustic driver configured to output sounds from at least two first guiding holes and at least one high-frequency acoustic driver configured to output sounds from at least two second guiding holes. The controller may be configured to direct the at least one low-frequency acoustic driver to output the sounds in a first frequency range and direct the at least one high-frequency acoustic driver to output the sounds in a second frequency range. The Bluetooth module may be configured to connect the acoustic output device with at least one terminal device. The button module may be configured to implement an interaction between a user of the acoustic output device and the acoustic output device.

A sound collection apparatus includes a substantially spherical base on which at least a predetermined number of recess portions are provided in a surface thereof with a predetermined interval therebetween; and a predetermined number of microphones. The predetermined number is an integer of 2 or greater. The microphones are installed on an inner bottom surface side of the recess portions one by one. Intervals between sound collecting portions of adjacent microphones are substantially equal to each other.

An acoustic waveguide in accordance with one or more embodiments of the present technology that comprises a housing having a proximal end with an inlet aperture and a distal end with an outlet aperture, and a mounting flange positioned at the proximal end and configured to acoustically couple a driver to inlet aperture. A plurality of sound channels extend through the housing and acoustically couple the inlet aperture to the outlet aperture. Each sound channel at least partially defining a sound path has an acoustic length, wherein at least one of the sound paths of the plurality of sound channels has a bend angle that exceeds 180 degrees.

The sound detection device comprises a substrate, an array of sound detectors in or on a surface of the substrate, a processing circuit coupled to the sound detectors, the processing circuit being configured to sum signals from the sound detectors with relative time delays or phase shifts that compensate for propagation delay of sound along the array in a sound propagation mode that is bound to said surface. In an embodiment the sound in said sound propagation mode is bound to the surface using an acoustic waveguide, wherein the surface of the substrate forms a part of the acoustic waveguide, the sound detection device comprising a wall facing the array of sound detectors, with a space between the surface of the substrate and the wall, the sound detection device comprising an opening that provides incoming sound from outside the device access to said space, for excitation of the wave in the bound propagation mode in the acoustic waveguide by sound from outside the device.

The present invention discloses directional loudspeaker at least comprising: a loudspeaker cabinet comprising: a folded horn with a length of minimum one quarter of a wavelength, λ, and the horn mouth opening is asymmetrically placed in a front baffle providing a physical delay between the different wraparound pathways to the rear side of the loudspeaker cabinet; one or more driver speakers loading the horn with an open rear chamber, the open rear chamber having at least two opening pathways with a distance there between providing a physical delay of a rear wave, the loudspeaker cabinet provides at least four pathways for in phase and out of phase signals, at least two pathways for the out of phase signal and at least two pathways for the in phase signal amplified by the horn.

The present invention discloses directional loudspeaker at least comprising: a loudspeaker cabinet comprising: a folded horn with a length of minimum one quarter of a wavelength, λ, and the horn mouth opening is asymmetrically placed in a front baffle providing a physical delay between the different wraparound pathways to the rear side of the loudspeaker cabinet; one or more driver speakers loading the horn with an open rear chamber, the open rear chamber having at least two opening pathways with a distance there between providing a physical delay of a rear wave, the loudspeaker cabinet provides at least four pathways for in phase and out of phase signals, at least two pathways for the out of phase signal and at least two pathways for the in phase signal amplified by the horn.

An autonomous vehicle control device controls an autonomous vehicle provided with a warning sound output device. The autonomous vehicle control device prohibits transition to a traveling mode when an abnormality occurs in the warning sound output device. Before traveling, the autonomous vehicle control device may execute sound output control to cause the warning sound output device to output a warning sound, and determine whether the abnormality occurs based on output data of the warning sound output by the warning sound output device.

A speaker arrangement structure includes: a speaker device provided in an A-pillar (front pillar) of a vehicle and configured to turn and transmit sound, produced upward, toward a vehicle compartment; a curtain airbag extending in an up-down direction along an extending direction of the A-pillar and attached to the front pillar; and a bracket configured to attach a lower end of the curtain airbag to the front pillar. The speaker device is arranged below the bracket.

An acoustic device with an open audio device structure that is configured to be carried on the head or upper torso of a user, a housing carried by the open audio device structure, the housing having opposed first and second ends, a flat diaphragm in the housing and comprising a front face and a rear face, the diaphragm configured to radiate front acoustic radiation from its front face and rear acoustic radiation from its rear face, wherein the front and rear acoustic radiations are out of phase, structure that supports the diaphragm such that the diaphragm can move relative to the housing, a primary magnet adjacent to the rear face of the diaphragm, a magnetic circuit that defines a path for magnetic flux of the primary magnet, a voice coil that is exposed to the magnetic flux and is configured to move the diaphragm up and down along a radiation axis that is normal to the front face of the diaphragm, and first and second sound-emitting outlets in the housing, wherein the first sound-emitting outlet is in or proximate the first end of the housing and is acoustically coupled to the front face of the diaphragm so as to emit front acoustic radiation into an acoustic space, and wherein the second sound-emitting outlet is in or proximate the second end of the housing and is acoustically coupled to the rear face of the diaphragm so as to emit rear acoustic radiation into the same acoustic space.