An earphone comprising an earphone housing having a body portion, the body portion having an acoustic output opening to output sound from a driver positioned therein into an ear of a user. An acoustic tuning member is positioned within the body portion. The acoustic tuning member defines a back volume chamber of the driver and includes an acoustic output port for outputting sound from the back volume chamber of the driver to improve an acoustic performance of the earphone.

Intra-concha earphones are disclosed. In an embodiment, an intra-concha earphone includes a housing having a rear space divided into a back volume, a bass duct, and a vent chamber between a driver and a rear wall. The vent chamber may be acoustically coupled with the back volume through both an acoustic port and the bass duct. Furthermore, the vent chamber may be acoustically coupled with a surrounding environment through a vent port, which may be a sole acoustic opening in the rear wall. Thus, sound emitted by the driver may propagate through the acoustic port and the bass duct to meet in the vent chamber before being discharged through the vent port to the surrounding environment. Other embodiments are also described and claimed.

An air-pulse generating device, a wearable sound device, bladeless fan, and an airflow producing method are disclosed. The air-pulse generating device includes a film structure, configured to be actuated to generate a plurality of air pulses at an ultrasonic pulse rate. The plurality of air pulses produces a net airflow toward one single direction.

A method for designing and making an acoustic meta material back enclosure with a band gap tube for a loudspeaker having predefined dimensions of the enclosure is described. The method includes identifying a resonant frequency of the enclosure, as well as a baseline speaker output within a predefined range of frequencies. The method further includes defining a desired frequency range, within the predefined range of frequencies, within which it is desired to increase the speaker output, and identifying a naturally occurring band gap frequency range for the enclosure. Parameters of an acoustic meta material (AMM) band-gap tube, to be inserted into the enclosure for porting thereof, are calibrated to improve speaker output in the desired frequency range, based on the identified band gap frequency range. The enclosure is then ported using AMM band-gap tube in accordance with the calibrated parameters.

An earpiece includes an electro-acoustic transducer and a housing that supports the electro-acoustic transducer such that the housing and the electro-acoustic transducer together define a first acoustic volume and a second acoustic volume. The electro-acoustic transducer is arranged such that a first radiating surface of the transducer radiates acoustic energy into the first acoustic volume and a second radiating surface of the transducer radiates acoustic energy into the second acoustic volume. A mesh is disposed along an outlet of the housing and is arranged to inhibit debris from entering the front acoustic volume. A first microphone is supported in the housing. The first microphone includes a microphone port for sensing pressure. A chimney surrounds the microphone port and mechanically couples the first microphone to the mesh.

The present invention discloses an open-ear hook-type wearable sound producing device, including a main body and an ear hook connected to the main body, wherein at least one speaker and at least one microphone are arranged in the main body; one side, facing a human ear, of the main body is provided with a forward vent; a distance between the orifice of the forward vent and an ear canal entrance point (EEP) is 0.1 to 50 mm; and a distance between a pickup end of the at least one microphone and the EEP is 0.5 to 10 mm. The structure and layout of the present invention are rational, which is helpful to improve noise cancellation performance and is suitable to wear for long listening sessions.

In an electronic device, a first sound generating module is disposed in a first accommodating cavity; and a second sound generating module is disposed in an accommodating space; when the first sound generating module is in a first operating state, the second sound generating module is in a second operating state, the first sound generating module outputs a first vibration signal to a housing, and the second sound generating module outputs a second vibration signal to the housing; or sound waves emitted by the first sound generating module form first sound waves in the first accommodating cavity, and sound waves emitted by the second sound generating module form second sound waves in the first accommodating cavity; or the first sound generating module outputs a first vibration signal to a housing, and sound waves emitted by the second sound generating module form second sound waves in the first accommodating cavity.