An apparatus may include a vibration member, a supporting member at a rear surface of the vibration member, and a vibration apparatus. The vibration apparatus may be disposed at the supporting member and may include a curved shape.

An apparatus may include a vibration member, a rear cover at a rear surface of the vibration member, a first vibration device at a first rear region of the rear cover, and a second vibration device at a second rear region of the rear cover. The first vibration device may overlap at least one of a horizontal region and a middle region of the rear cover. The second vibration device may overlap a periphery region or a middle region of the rear cover.

Techniques are provided for generating sound using a speaker mounted to an enclosure (e.g., speaker cabinet) wherein a gas pressure level (e.g., air pressure level) inside the enclosure is lower than an ambient air pressure level outside the enclosure. The reduced gas pressure level within the enclosure provides an environment with a reduced pressure level at a back side of a speaker cone of the speaker, which enhances a low frequency response for a given speaker size, while also minimizing resonant frequencies and phase cancellation issues which could otherwise occur with conventional speaker systems in which acoustic sound waves are generated at the back side of the speaker cone. A pressure compensation system is utilized counteract a force applied to the front side of the speaker cone as a result of the gas pressure level inside the enclosure being lower than the ambient air pressure level outside the enclosure.

The present disclosure relates to an acoustic output device including an earphone core, a controller, a Bluetooth module, and a button module. The earphone core may include at least one low-frequency acoustic driver configured to output sounds from at least two first guiding holes and at least one high-frequency acoustic driver configured to output sounds from at least two second guiding holes. The controller may be configured to direct the at least one low-frequency acoustic driver to output the sounds in a first frequency range and direct the at least one high-frequency acoustic driver to output the sounds in a second frequency range. The Bluetooth module may be configured to connect the acoustic output device with at least one terminal device. The button module may be configured to implement an interaction between a user of the acoustic output device and the acoustic output device.

The present disclosure is directed to a sound amplification device. The sound amplification device comprises a vibrating body, the vibrating body including at least one first vibration surface and at least one contact region for contacting with a vibration source. The vibration source detachably contacts with a contact region, an area of a first vibration surface is larger than an area of the contact region, the vibration source is configured to generate vibration, and the vibration is transmitted to the first vibration surface through the contact region, and further transmitted outwards through the first vibration surface.

An acoustic diffusion and absorption system can have an ear coupler consisting of a transducer and an ear pad defining a volume surrounding an ear of a user. An insert may be positioned inline between the transducer and the ear of the user to fill at least a portion of the volume defined by the ear pad with the insert having a thickness and a plurality of channels. A first channel of the plurality of channels may continuously extending through the insert to form a waveguide while a second channel of the plurality of channels can have a length that is less than the thickness of the insert to form a resonator.

A loudspeaker assembly for a vehicle includes a loudspeaker having a first side facing a vehicle interior and an opposed second side, wherein the loudspeaker is configured to generate an acoustical signal having a rear wave directed into the vehicle interior and a front wave directed away from the vehicle interior toward a vehicle exterior. A motor assembly is on the first side of the loudspeaker, and a diaphragm is at the second side of the loudspeaker for generating the rear wave and the front wave. The loudspeaker assembly includes a bracket into which the loudspeaker is mounted, the bracket including a basket for receiving and supporting the motor assembly, and a coupler disposed on the second side of the loudspeaker and extending toward the vehicle exterior, wherein the coupler is arranged to transmit the front wave to the vehicle exterior.

A speaker comprises a housing, a transducer residing inside the housing, and at least one sound guiding hole located on the housing. The transducer generates vibrations. The vibrations produce a sound wave inside the housing and cause a leaked sound wave spreading outside the housing from a portion of the housing. The at least one sound guiding hole guides the sound wave inside the housing through the at least one sound guiding hole to an outside of the housing. The guided sound wave interferes with the leaked sound wave in a target region. The interference at a specific frequency relates to a distance between the at least one sound guiding hole and the portion of the housing.

A speaker comprises a housing, a transducer residing inside the housing, and at least one sound guiding hole located on the housing. The transducer generates vibrations. The vibrations produce a sound wave inside the housing and cause a leaked sound wave spreading outside the housing from a portion of the housing. The at least one sound guiding hole guides the sound wave inside the housing through the at least one sound guiding hole to an outside of the housing. The guided sound wave interferes with the leaked sound wave in a target region. The interference at a specific frequency relates to a distance between the at least one sound guiding hole and the portion of the housing.

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.