A loudspeaker assembly includes L loudspeakers, each being substantially the same size and having a peripheral front surface, and an enclosure having a hollow cylindrical body and end closures, the cylindrical body and end closures being made of material that is impervious to air. The cylindrical body comprises L openings therein. The L openings are sized and shaped to correspond with the peripheral front surfaces of the L loudspeakers, and have central axes. The central axes of the L openings are contained in a radial plane, and the angles between adjacent axes are identical. The L loudspeakers are disposed in the L openings and hermetically secured to the cylindrical body. L is equal to or greater than 2. A higher-order loudspeaker system comprising such a loudspeaker assembly and a beamforming module.

An improved loudspeaker that has a plurality of electrostatic transducers forming a card stack that is housed in a stack holder. The stack holder can support the loudspeaker perforated grill (or mesh), can secure the card stack to the speaker case, and can provide a watertight electrical connection to the sealed chamber of the loudspeaker (that contains the main circuit board for controlling the loudspeaker).

An omni-directional speaker system includes a deflector sub-assembly and a pair of acoustic sub-assemblies. The deflector sub-assembly includes a pair of diametrically opposed acoustic deflectors. Each of the acoustic sub-assemblies includes an acoustic driver for radiating acoustic energy toward an associated one of the acoustic deflectors. The acoustic sub-assemblies are coupled together via the deflector sub-assembly.

A driving circuit is disclosed. The driving circuit includes a first node, coupled to at least a first air pulse generating element, wherein the driving circuit produces a first driving signal to the at least a first air pulse generating element via the first node; a second node, coupled to at least a second air pulse generating element, wherein the driving circuit produces a second driving signal to the at least a second air pulse generating element via the second node; a first swapping module, coupled to the first node and the second node, configured to be conducted within a first conduction interval; wherein a first voltage level at the first node and a second voltage level at the second node are substantially swapped after the first conduction interval.

A speaker system is disclosed with user-selectable output modes including controlled directivity output modes (e.g. selectable monopole, dipole, or cardioid radiation patterns), that may be implemented with adjustable electronic delay of out-of-phase driver elements, and that provides for both even-orderharmonic distortion reduction and driver force cancellation in a compact assembly suitable for home or studio use.

A sound producing device includes at least one air pulse generating element. Each of the at least one air pulse generating element includes a membrane, a first air chamber and at least one opening, wherein a chamber pressure exists in the first air chamber. The membrane is actuated to change the chamber pressure of the first air chamber to generate a plurality of air pulses, the air pulses are propagated through the at least one opening, the air pulses produce a non-zero offset in terms of sound pressure level, and the non-zero offset is a deviation from a pressure value of an ambient pressure outside the sound producing device.

A loudspeaker apparatus includes a first loudspeaker unit and a second loudspeaker unit that reproduce sound at least at a high frequency. The first loudspeaker unit and the second loudspeaker unit are placed on a plane having an axis extending in a horizontal direction and an axis extending in a vertical direction. The first loudspeaker unit is placed so as to be directed horizontally forward. The second loudspeaker unit is placed so as to be directed vertically upward to make an approximately 90 angle with the first loudspeaker unit.

An audio speaker includes an enclosure having a coupling chamber and a loading chamber, at least m radiating drivers, and at least one and no more than m1 loading driver(s), wherein m is at least two. The coupling chamber acts to couple the at least m radiating drivers and the at least m1 loading driver(s), for example, and the loading chamber acts to load the loading driver(s). The at least one and no more than m1 loading driver(s) may have a higher sensitivity than the at least m radiating drivers and the at least m radiating drivers may be arranged within the enclosure to minimize a volume of the coupling chamber. In other embodiments, the at least one and no more than m1 loading driver(s) may be other types of inducers (e.g., an undriven loading driver(s), a drone cone, a port, or combinations thereof).

A vibration inducing tactile apparatus is configured for introducing audio-based vibrations into them body of a user. The apparatus includes a housing, with the housing having a top panel for supporting the user. A digital sound processor is installed in the housing, with the digital sound processor in communication with a controller. The housing further includes a speaker array and a low pass filter in communication with the digital sound processor, with the low pass filter in communication with a primary amplifier. A speaker array is driven by a secondary amplifier, and a first transducer and a second transducer are driven by the primary amplifier. The digital sound processor modifies a first signal sent to the first transducer relative to a second signal sent to the second transducer, such that the audio-based vibrations have resonating frequencies and are transferred from the apparatus to the user.

A thin loudspeaker device includes a housing, a battery, and a loudspeaker module. The battery and the loudspeaker module are located in the housing. The loudspeaker module includes an inner shell, two loudspeaker units, and a block wall. The two loudspeaker units are located in the inner shell. The two loudspeaker units are electrically connected to the battery. The block wall is located between the two loudspeaker units. The inner shell and the block wall jointly form two chambers and a channel. The channel is communicated with the two chambers. The two loudspeaker units are respectively located in the two chambers.