The present application provides a method of manufacturing a resonant panel (200) of a flat panel loudspeaker. The method comprises: pressing a resonant panel blank between a first pressing surface (302) and a second pressing surface of a press, whereby to form the resonant panel (200) of the flat panel loudspeaker. The second pressing surface substantially opposes the first pressing surface (302). The first pressing surface (302) comprises at least one tool relief region (306, 312, 314, 316, 318), whereby to form at least one corresponding respective panel relief region (206, 212, 214, 216, 218) in a surface of the resonant panel (200).

Microphone arrays (MAs) are described that position and vent microphones so that performance of a noise suppression system coupled to the microphone array is enhanced. The MA includes at least two physical microphones to receive acoustic signals. The physical microphones make use of a common rear vent (actual or virtual) that samples a common pressure source. The MA includes a physical directional microphone configuration and a virtual directional microphone configuration. By making the input to the rear vents of the microphones (actual or virtual) as similar as possible, the real-world filter to be modeled becomes much simpler to model using an adaptive filter.

An electronic device according to various embodiments may include: a housing, an acoustic hole formed in a first direction of the housing, an instrument installed in the housing in a second direction perpendicular to the first direction, a mic, and a mic holder including a body installed in the housing, a seat formed in the body part to receive the mic, a first opening formed in one surface of the body and connected to the seat, a second opening formed in another surface of the body, and a third opening formed in the body and connected to the acoustic hole. As the second opening of the mic holder is closed by an instrument of the electronic device closely attached to the other surface of the body part, an acoustic channel in which a sound introduced into the third opening is delivered to a mic hole of the mic may be formed.

Loudspeaker enclosures and loudspeaker devices are provided. In some embodiments, a loudspeaker device is provided, the loudspeaker device comprising: a loudspeaker enclosure, comprising: a rear side; and a front side of the loudspeaker enclosure comprising: a lower portion of the front side comprising a first opening for receiving a first loudspeaker and a second opening for receiving a second loudspeaker; and an upper portion of the front side comprising a third opening for receiving a third loudspeaker, a first port, and a second port, wherein a distance from the lower portion of the front side to the rear side is greater than a distance from the upper portion of the front side to the rear side; the first loudspeaker positioned in the first opening; the second loudspeaker positioned in the second opening; and the third loudspeaker positioned in the third opening.

A microphone includes a base, at least one sound receiving element, and a flexible circuit board. The base has a plurality of supporting portions, a plurality of damping portions, and a bearing portion. The plurality of supporting portions are spaced apart from each other. Each of the plurality of damping portions is disposed on an inner surface of the corresponding supporting portion. The bearing portion is connected to the plurality of damping portions and is suspended between the plurality of supporting portions. The at least one sound receiving element is disposed on the base. The flexible circuit board is disposed on the base and has a first transmission segment. The first transmission segment is electrically coupled to the at least one sound receiving element, and the first transmission segment has a plurality of bending sections.

Embodiments for one-way sound absorbing systems are described herein. In one example, a sound absorbing system includes a waveguide having open ends for receiving an incoming acoustic wave and wall portions defining a first port and a second port. A first electroacoustic absorber is mounted to the first port and is electrically connected to a shunting circuit, while a second electroacoustic absorber is mounted to the second port and is electrically connected to an open circuit. The sound absorption of the system is directional dependent.

A biological sound acquisition device (10) includes a housing (100), a first acceleration sensor (210), and a second acceleration sensor (220). The first acceleration sensor (210) is disposed in the housing (100). The first acceleration sensor (210) is mechanically connected to the housing (100) through a first vibration damping member (410). The second acceleration sensor (220) is disposed in the housing (100).

The invention relates to speaker systems for high-quality sound reproduction. It provides a simplified structure of the device, improves the device manufacturability and durability. The speaker system includes the driver, the horn for reproducing low-frequency range sound (rear horn), and the horn for reproducing high-frequency and mid-frequency range sound (front horn); both horns are made in the form of a single enclosure with the capability of mounting the driver in this enclosure, while the enclosure is made of two solid parts symmetrical with respect to the plane of the central vertical section, each part represents a half of the overall profile of the front and rear horns, with no joints at the junction between the front and the rear horns.

An apparatus for sound detection, sound localization and beam forming comprises a display and a plurality of microphone stacks, wherein the display surrounds each microphone stack in lateral directions. The apparatus further comprises a plurality of elastic connectors, wherein each elastic connector surrounds one respective microphone stack in lateral direction and mechanically connects the respective microphone stack with the display. Each microphone stack further comprises a microelectromechanical transducer array, the transducer array comprising a plurality of membranes, in particular nano-membranes, and corresponding integrated back-volumes, the back-volumes being arranged under the membranes. An optical reading device is configured to separately detect the displacement of each membrane.

The present application provides a method of manufacturing a resonant panel (200) of a flat panel loudspeaker. The method comprises: pressing a resonant panel blank between a first pressing surface (302) and a second pressing surface of a press, whereby to form the resonant panel (200) of the flat panel loudspeaker. The second pressing surface substantially opposes the first pressing surface (302). The first pressing surface (302) comprises at least one tool relief region (306, 312, 314, 316, 318), whereby to form at least one corresponding respective panel relief region (206, 212, 214, 216, 218) in a surface of the resonant panel (200).