This document describes techniques and systems that enable a range extender device. The techniques and systems include a user device that includes a housing with an audio sensor, a heat sink assembly, a circuit board assembly, and a speaker assembly positioned within the housing. The housing includes a top housing member connected to a bottom housing member. The top housing member includes a concave-down top-end portion connected to a generally-cylindrical vertical wall via rounded corners. The heat sink assembly includes a heat sink and one or more antennas positioned proximate to an inner surface of the vertical wall. The circuit board assembly is positioned within the housing and proximate to the heat sink assembly, and the speaker assembly is positioned within the housing and connected to the circuit board assembly. Also, a light ring assembly is connected to a bottom exterior surface of the bottom housing member.

The present disclosure discloses an acoustic output apparatus including at least one acoustic driver, a controller, and a supporting structure. The at least one acoustic driver may be configured to output sounds through at least two sound guiding holes. The at least two sound guiding holes may include a first sound guiding hole and a second sound guiding hole. The controller may be configured to control a phase and an amplitude of the sounds generated by the at least one acoustic driver using a control signal such that the sounds output by the at least one acoustic driver through the first and second sound guiding holes have opposite phases. The supporting structure may be provided with a baffle and configured to support the at least one acoustic driver such that the first and second sound guiding holes are located on both sides of the baffle.

This speaker system includes: a speaker device that is disposed outside a region of a projection surface on which a display surface of a display is projected, the speaker device functioning as a real sound source; and a reflector that has a reflection surface reflecting a sound output from the speaker device, the reflector localizing a sound image of a virtual sound source within the region of the projection surface. The reflector has an elliptical reflection surface in at least a part of the reflection surface. With this configuration, the sound output from the speaker device disposed outside the region of the projection surface is reflected on the reflector, and a sound image thereof is localized within the region of the projection surface, whereby it is possible to bring a display position of a video into alignment with an output position of the sound. Thus, a comfortable viewing state can be ensured for a viewer.

A voice controlled assistant has a housing to hold one or more microphones, one or more speakers, and various computing components. The housing has an elongated cylindrical body extending along a center axis between a base end and a top end. The microphone(s) are mounted in the top end and the speaker(s) are mounted proximal to the base end. The microphone(s) and speaker(s) are coaxially aligned along the center axis. The speaker(s) are oriented to output sound directionally toward the base end and opposite to the microphone(s) in the top end. The sound may then be redirected in a radial outward direction from the center axis at the base end so that the sound is output symmetric to, and equidistance from, the microphone(s).

A display assistant device comprises a display, a camera, a speaker, microphones, a processor and memory. The memory stores programs comprising instructions that, when executed by the processor, enable a plurality of modes of the display assistant device. The modes include a monitoring mode and an assistant mode. In the monitoring mode, the device is configured to perform a remote monitoring function in which first video captured by the camera is streamed to a remote server system for monitoring uses. The monitoring uses include transmission of the first video to remote client devices authorized to access the first video. In the assistant mode, the device is configured to perform a second plurality of functions that excludes the monitoring function and includes a video communication function in which second video captured by the camera is transmitted to second devices participating in a video communication with a first user of the device.

The disclosure provides an electronic device including a substrate, a first vibrating unit, and a supporting unit. The substrate has a first surface. The first vibrating unit is disposed on the first surface and has a second surface. The second surface faces the first surface. The supporting unit is disposed between the substrate and the first vibrating unit. The first surface and the second surface are separated by a distance through the supporting unit. This distance ranges from equal to or greater than 0.06 mm to equal to or less than 65.4 mm.

A bone conduction speaker includes a housing, a vibration board and a transducer. The transducer is located in the housing, and the vibration board is configured to contact with skin and pass vibration. At least one sound guiding hole is set on at least one portion of the housing to guide sound wave inside the housing to the outside of the housing. The guided sound wave interfaces with the leaked sound wave, and the interfacing reduces a sound pressure level of at least a portion of the leaked sound wave. A frequency of the at least a portion of the leaked sound wave is lower than 4000 Hz.

An earplug includes a housing and a receiver positioned in the housing. The receiver may be configured to receive a wireless audio signal from an audio source external to the earplug and convert the wireless audio signal to an electrical audio signal. The earplug may include a speaker configured to receive electrical audio signal from the receiver and convert the electrical audio signal into audible sound output from a speaker port. The earplug may include a projection including an opening that defines at least a portion of a sound channel from the speaker. The projection may receive the audible sound output from the speaker and output the audible sound out of the earplug. The earplug may include earplug padding configured to form a seal with a user's ear canal. The earplug may include an acoustic vent positioned in the sound channel, including a waterproof membrane extending across the channel.

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.