Disclosed is a voice input apparatus including: a speaker having a diaphragm for outputting sound downward; a speaker room in which the diaphragm is accommodated; and a microphone disposed outside the speaker room, wherein the speaker room includes: a room base disposed below the diaphragm; a sound guide which is protruded upward from the room base, positioned below the diaphragm, and reflects the sound outputted from the diaphragm outward in a radial direction; and a room sidewall which is extended upward from a circumference of the room base to surround the sound guide, and has a sound discharge port for emitting the sound reflected by the sound guide to the outside of the speaker room.

A voice conversation apparatus includes a microphone configured to convert a voice of the one speaking person into a voice signal, modulation means configured to modulate the voice signal into a signal using ultrasound as a carrier wave, sound wave emission means configured to emit the signal modulated by the modulation means as a sound wave using ultrasound as a carrier wave, alignment means used by the one speaking person to make alignment so that the sound wave emission means is oriented to another voice conversation apparatus, pairing means configured to perform a pairing process of connecting the voice conversation apparatus to the other voice conversation apparatus by near-field communication, and control means configured to receive an instruction to start a conversation from the one speaking person and to, when the pairing process is successful, cause the sound wave emission means to emit the sound wave.

The present invention provides an audio output device. The audio output device includes a speaker unit, a first plate and a second plate. The speaker unit has a sound-emitting surface, and the sound-emitting surface has a first side and a second side opposite to each other. A first side edge of the first plate corresponds to the first side and is rotatably connected. A second side of the second plate corresponds to the second side and is rotatably connected, and a sound channel corresponding to the speaker unit is formed between the first plate and the second plate, and a sound outlet is formed at an end of the sound channel farthest away from the speaker unit, and a direction pointed by a connection line between a center point of the sound-emitting surface and a center point of the sound outlet is adjustable.

A system for automatically adjusting a volume of a loudspeaker includes a loudspeaker and a processor. An infrared sensor, which generates a sensing signal when sensing IR radiation from a heat-radiating source, is disposed on the loudspeaker. The sensing signal provides a size information commensurate with a size of the heat-radiating source. The processor receives a plurality of the sensing signals at different time points to obtain a plurality of corresponding size information, realizes a change of distance between the heat-radiating source and the loudspeaker according to a change of the size information, and generates a volume-adjusting signal according to the change of distance between the heat-radiating source and the loudspeaker. The volume-adjusting signal is transmitted to the loudspeaker to adjust the volume of the loudspeaker accordingly.

An underwater sound generation device may be used for effective control of algae and other microorganisms in ponds and lakes. The sound projector may comprise a thermoacoustic sound transducer and an electronic unit for controlling the operation of the projector. The thermoacoustic projector may include a freestanding carbon nanotube (CNT) film encapsulated between two vibrating plates. The inert gas filled thin acoustical cavity provides a piston-type displacement of the plates and supports a high-temperature operation. A power supply driver, controlling the operation of the sound radiating system, may include a pulse generator, high-power switch amplifier, and a cable, connecting the projector with an electronic driver. The sound control system may provide an omnidirectional sound pressure level in a wide frequency range to affect the algae growth ecosystem over large distances.

Embodiments are directed to a speaker system that contains an array of multiple dispersion drivers that creates an expansive acoustic pattern to playback multi-channel audio content through a standalone speaker. The speaker system comprises an interface receiving stereo audio; an upmixer generating surround sound formatted audio from the stereo audio including one or more height channels; a virtualizer/downmixer component coupled to the upmixer and generating speaker feeds for two or more loudspeaker output sections, configured to play back the stereo audio, wherein each output section is further configured to play its own dedicated stereo audio signals; and a set of drivers each coupled to a respective output section and configured to project sound in at least two different dispersion patterns.

Embodiments for manipulating an audio environment by a processor. A noncalibrative stimulus is detected in the audio environment. In response to the detected noncalibrative stimulus, a component in the audio environment is caused to modify an audio characteristic in order to change a physical property of sound generated in the audio environment.

A method of sound box position adjustment is provided, including: An electronic device sends a first playing instruction to a sound box, where the first playing instruction is used to instruct the sound box to rotate from a first position to a second position in a preset direction and play positioning audio in a process of rotation, and a loudness of the positioning audio is unchanged when the positioning audio is being played; the electronic device receives the positioning audio; the electronic device determines indication information based on the positioning audio, where the indication information is used to determine a target position of the sound box, the target position is a position of the sound box when a loudness of the received audio is largest in a process of receiving the positioning audio; and the electronic device sends the indication information to the sound box.

An electronic device includes a body and a sound cavity assembly. The sound cavity assembly is coupled to the body and forms a sound cavity cooperatively with the body. The sound cavity includes a speaker and a cover. The cover is coupled to the body and at least partially protruding from the body to adjust a volume of the sound cavity.

A sound control apparatus includes: a display panel that is supported by a base provided in a vehicle in a manner in which an angle of the display panel relative to the base is variable; an angle detector configured to detect the angle; and a controller configured to change sound setting in a cabin of the vehicle in accordance with the angle.