A sound-producing structure includes: a hollow piece; a sound-producing piece located in a hollow cavity of the hollow piece; and a heat dissipation piece located outside the hollow cavity, a first part of the heat dissipation piece being located below the hollow piece and a second part of the heat dissipation piece being on a side wall of the hollow piece.

Various aspects of the present disclosure are directed to a subwoofer housing that may be installed within a motorcycle storage container (also known as a saddlebag). The subwoofer housing may include a subwoofer transducer which when used in conjunction with full range audio transducers within the motorcycle audio system introduces dynamic low frequency harmonics into the overall frequency response. In some embodiments of the present disclosure, the subwoofer housing may include an active subwoofer transducer, and a passive radiator transducer, both with downward orientations. The saddlebag including a floor, and one or more air vents in the floor. Sound waves emitted from the active subwoofer transducer and the passive radiator transducer travel through the one or more air vents and reflect in an omni-directional pattern from a road surface to generate greater audible levels of the low frequency sound waves.

A wireless earring assembly for discretely streaming audio into a user's ears includes a pair of earrings that each includes an ornament, a stud extending away from the ornament and a retainer that is slidable onto the stud. A pair of audio units is each integrated into the ornament of a respective one of the earrings. Each of the audio units is in wireless communication with an audio source such that each of the audio units receives an audio signal from the audio source. Additionally, each of the audio units has sound emitting capabilities to emit audible sounds from the audio signal toward the user's ear.

A substantially full-range loudspeaker system for acoustic sound reinforcement can include a woofer section with a first loudspeaker driver configured to reproduce audio signals in a first frequency range and a controlled-directivity horn section configured to reproduce other audio signals in a different second frequency range. In an example, the horn section includes a second loudspeaker driver comprising a cone-diaphragm transducer and a dust dome, an acoustic lens having a first side and an opposite second side, wherein the first side of the lens is coupled to a sound-projecting face of the second loudspeaker driver, and a waveguide coupled to the second side of the lens, wherein the waveguide comprises walls that follow arcuate paths in horizontal and vertical planes.

Techniques are described for an in-ear audio system that delivers high quality sound into an ear canal of the user using two or more waveguides. Each of the waveguides may deliver sound output by individual drivers to a consolidation zone. The sound may be mixed at the consolidation zone and delivered to the ear canal of the user.

Embodiments are disclosed of a speaker capable of producing multi-frequency-range sound using bar magnets, multiple diaphragms, and a shared planar voice coil. The planar voice coil is located between the bar magnets and translates a received electric signal into the kinetic energy that vibrates the diaphragms, thus reproducing multi-frequency range sound. In some embodiments, the speaker generates bi-directional sound.

Various implementations include seats and related loudspeakers. In particular cases, a seat includes: a seat headrest portion; a seat backrest portion; and a loudspeaker assembly. The loudspeaker assembly includes at least one driver for generating an acoustic output; and an acoustic exit fixed in the seat backrest portion and angled to provide the acoustic output to a location below a nominal ear position of an occupant of the seat, wherein a firing angle of the at least one driver provides the acoustic output to achieve a consistent frequency response across a range of positions deviating from the nominal ear position.

What is disclosed is a loudspeaker reproduction system for a vehicle having a first loudspeaker array and a second loudspeaker array. The first loudspeaker array is configured to generate a first stereo or virtual multi-channel sound field, wherein the first loudspeaker array is aligned towards a driver position of the vehicle. The second loudspeaker array is configured to generate a second stereo or virtual multi-channel sound field, wherein the second loudspeaker array is aligned towards a front passenger position of the vehicle.

Noise is suppressed from a microphone array by estimating a noise field isotropy. In some examples audio is received from a plurality of microphones. A power spectral density of a beamformer output is determined and a power spectral density of microphone noise differences is determined. A noise power spectral density is determined using a transfer function and the noise power spectral density is applied to the beamformer output power spectral density to produce a power spectral density output of the received audio with reduced noise.

A system may comprise a speaker in a speaker tube; a directional tube having a proximal end openly connected to the speaker tube; a first plate having an opening aligned with a distal end of the directional tube; a diaphragm in a spaced apart relationship with the first plate such that an air enclosure is formed between the diaphragm and the first plate, wherein the air enclosure, the directional tube, and the speaker tube cooperate to form a static-air space such that air pressure changes in the space produced by the at least one speaker move the diaphragm; a second plate in a spaced apart relationship with the diaphragm such that a gas enclosure is formed between the diaphragm and the second plate; wherein movement of the diaphragm moves gas in the gas enclosure through the second plate thereby modulating flames above the second plate when the gas is ignited.