An in-ear headphone includes a shell, a speaker, a circuit board, and a sensing structure. The shell has an accommodating space. The speaker is disposed in the accommodating space. The circuit board is disposed in the accommodating space, and the circuit board is electrically connected to the speaker. A sensing chip is disposed on the circuit board. The sensing structure includes a sensing sound tube and a transmission member. The sensing sound tube protrudes from a front end of the shell and has a conductor. The sensing sound tube is electrically connected to the sensing chip by the transmission member. A material of the sensing sound tube is different from a material of the shell.

An acoustic speaker (1) including: a metal armature (7), a plastic shell (9) fastened on the armature, the shell defining at least two openings (11A, 11B), and at these two loudspeakers (13A, 13B) arranged head to tail along a transverse axis (T), the two loudspeakers respectively extending through the two openings. The shell is in one piece, and the shell and an outer part (19) of the armature are suitable for nesting in one another along a longitudinal axis (L), the outer part and the shell at least partially defining an inner volume (23) of the acoustic speaker.

The disclosed technology relates to a multi-use audio player, and more particularly, to an audio player with the ability to switch between a fully operational portable stand-alone audio player that is open baffle (box-less), and an audio player that can serve as a closed baffle audio driver module when placed in an enclosure.

Embodiments of apparatus are disclosed for affecting working fluid flow in a system that delivers material between two locations by carrying the material in the working fluid. For example, embodiments of the disclosed apparatus may be used in an internal combustion engines to carry fuel droplets to a combustion area using air as the working fluid. The apparatus may include a passage including a funnel portion and tumble area that direct working fluid into a stratified stream. The stratified stream may include an outer boundary flow having a toroidal and/or helical flow characteristic and an inner flow carrying injected material that is bound by the outer flow.

A sound output assembly includes an enclosure, a speaker assembly disposed inside the enclosure, and a supporting member having at least a first end fixed to the enclosure such that the at least the first end of the supporting member and the enclosure are formed as one body. The speaker assembly includes an acoustic diaphragm configured to produce a sound by vibrating in accordance with a sound signal. The supporting member is configured to support the speaker assembly and to dampen vibration of the speaker assembly.

An acoustic speaker (1), comprising: a metal frame (3), a plastic shell (5) fastened on the frame, the shell defining at least two openings (7A, 7B), at these two loudspeakers (9A, 9B) arranged back-to-back along a transverse axis (T), the two loudspeakers respectively extending through the two openings. The frame comprises an inner part (21) located transversely between the two loudspeakers and on which the two loudspeakers are fastened.

A dual wave-column, dual-driver loudspeaker enclosure is described. The two drivers are cross-coupled through their respective front and back sides by two single exit wave-columns. At the wavelength frequency of the waveguide length, both drivers resonate with the waveguides, and cone motion is minimized while output is maximized. At the wavelength frequency, the front wave of the first driver is in-phase with, the rear wave of the second driver such that the output is increased, reinforced, and smoothed at that frequency. At the wavelength frequency, the two wave-column mouth outputs exhibit acoustic mutual coupling, which boosts acoustic output and reduces cone motion at the critical maximum displacement frequency.

A loudspeaker arrangement having a first loudspeaker comprising a first sound radiating surface and a first loudspeaker basket, and a second loudspeaker comprising a second sound radiating surface and a second loudspeaker basket. The first loudspeaker and the second loudspeaker are arranged opposite each other in a first direction, a cavity is formed between a front side of the first loudspeaker and a front side of the second loudspeaker, and the first loudspeaker basket is directly coupled to the second loudspeaker basket.

An earphone includes a speaker unit, a housing that receives the speaker unit therein, and a baffle that is arranged within the housing and supports an opposite surface of the speaker unit, which is opposite to a sound emission surface of the speaker unit, to define a first space between the opposite surface and the baffle. The baffle includes a vent hole through which the first space communicates with a second space that is opposite to the first space with respect to the baffle. A fourth space through which the first space communicates with a third space on a side of the sound emission surface of the speaker unit is defined between a side surface of the speaker unit and an inner surface of the housing.

A transducer system isolates vibrations produced by a transducer. The transducer system comprises the transducer and a vibration isolation system. The transducer can produce vibrations and is configured to be coupled to a device. The transducer includes a first sub-assembly including a coil assembly and a second sub-assembly including one or more magnets. The vibration isolation system is configured to isolate vibrations produced by the transducer from the device. The vibration isolation system includes a plurality of support brackets, and a suspension component including a plurality of flexures. The plurality of flexures includes a first set of flexures configured to suspend the first sub-assembly from the support brackets, a second set of flexures configured to suspend the second sub-assembly from the first sub-assembly, and a third set of flexures configured to suspend the second sub-assembly from the support brackets.