A directional sound recording module including a sound-receiving case, a plurality of sound inlet apertures, and a sound-receiving element is provided. The sound-receiving case encircles to form a chamber. A sound inlet opening and a fixing end are respectively formed at two opposite sides of the chamber. The sound inlet opening and the fixing end are communicated with each other. The sound inlet apertures are disposed on a surface of the sound-receiving case and corresponding to the chamber. An extending direction of the sound inlet apertures is perpendicular to the sound inlet opening of the sound-receiving case. The sound-receiving element is disposed at the fixing end of the sound-receiving case. The sound-receiving element is configured to record a sound entering the chamber from the sound inlet opening and the sound inlet apertures.

Embodiments are described for a high-frequency waveguide that improves the performance of large-scale surround sound and immersive audio environments. A horn waveguide is configured to be asymmetric about one of a vertical axis and horizontal axis of the waveguide to form an asymmetric horn waveguide. A spherical enclosure surrounds the asymmetric horn waveguide to form a horn speaker, and a three-axis mounting system is configured to fix the horn speaker to one of a wall or ceiling surface of the venue, wherein the mounting system facilitates rotating the horn speaker to a location that provides maximum coverage of the venue within the passband of the asymmetric horn waveguide.

Embodiments are described for a high-frequency waveguide that improves the performance of large-scale surround sound and immersive audio environments. A horn waveguide is configured to be asymmetric about one of a vertical axis and horizontal axis of the waveguide to form an asymmetric horn waveguide. A spherical enclosure surrounds the asymmetric horn waveguide to form a horn speaker, and a three-axis mounting system is configured to fix the horn speaker to one of a wall or ceiling surface of the venue, wherein the mounting system facilitates rotating the horn speaker to a location that provides maximum coverage of the venue within the passband of the asymmetric horn waveguide.

One embodiment provides a speaker device comprising a first housing including a first top surface comprising a first opening, a first recessed mounting surface spaced below the first opening, and a first recessed sidewall extending upwardly from the first recessed mounting surface to the first opening to form a first waveguide. The speaker device further comprises a first upward-facing driver mounted into the first recessed mounting surface. The first waveguide shapes propagation of acoustic energy generated by the first upward-facing driver to project the acoustic energy out of the speaker device in an upwardly inclined direction.

In one embodiment of the present invention, a manifold composites sound from multiple drivers into a single aperture that includes multiple concentric rings. In operation, channels within the manifold isolate the sound generated by each driver from the sound generated by the other drivers. The channels within the manifold are intertwined to route the sound from each driver to a separate location in one of the multiple concentric rings. When the sound generated by each of the drivers is judiciously and deterministically delayed, the manifold generates a single point source of sound that may be fed into an acoustic horn. Notably, by isolating the sound generated by each driver, the manifold minimizes reflections and resonances that often degrade the sound fidelity of conventional horn loudspeakers. Consequently, the disclosed manifold enables an acoustic horn to project coherent sound for significantly longer distances than the acoustic horn would achieve using a conventional manifold.

In one embodiment of the present invention, a manifold composites sound from multiple drivers into a single aperture that includes multiple concentric rings. In operation, channels within the manifold isolate the sound generated by each driver from the sound generated by the other drivers. The channels within the manifold are intertwined to route the sound from each driver to a separate location in one of the multiple concentric rings. When the sound generated by each of the drivers is judiciously and deterministically delayed, the manifold generates a single point source of sound that may be fed into an acoustic horn. Notably, by isolating the sound generated by each driver, the manifold minimizes reflections and resonances that often degrade the sound fidelity of conventional horn loudspeakers. Consequently, the disclosed manifold enables an acoustic horn to project coherent sound for significantly longer distances than the acoustic horn would achieve using a conventional manifold.

A speaker system includes one or more rotating speakers (or speakers with rotating reflectors) that are synchronized in absolute angular position to another rotating speaker or synchronized to audio effects to generated by a signal processing system driving a stationary or rotary speaker. Knowledge of absolute angular position in a multi-rotor speaker array or signal processing system allows for control of rotary position to accomplish acoustic effects otherwise not possible, such as matched-velocity profiles with differential phase control and motion profiles that are not based on simple rotation.

A speaker system includes one or more rotating speakers (or speakers with rotating reflectors) that are synchronized in absolute angular position to another rotating speaker or synchronized to audio effects to generated by a signal processing system driving a stationary or rotary speaker. Knowledge of absolute angular position in a multi-rotor speaker array or signal processing system allows for control of rotary position to accomplish acoustic effects otherwise not possible, such as matched-velocity profiles with differential phase control and motion profiles that are not based on simple rotation.

A mobile terminal is provided. The mobile terminal includes: a receiver, disposed on one side of a center line of the mobile terminal, where a sound outlet hole is provided in a display screen of the mobile terminal, a front cavity sound outlet channel of the receiver is provided inside the mobile terminal, and the front cavity sound outlet channel communicates with the sound outlet hole; and a through-hole is provided at the top of the mobile terminal, and the through-hole communicates with the front cavity sound outlet channel.

It is an object of the present invention is to smoothen air flow at the time of vibrations of the diaphragm, and to suppress variations in acoustic characteristics. Since the inclined surface 37c of the washer 37, which forms the air flow channel 50, is an inclined surface having a diameter gradually reduced with distance from the diaphragm 35 in the axial direction of the movable iron core 36, compared with the conventional step-shaped air flow channel having vertical surfaces, air flow in the air flow channel 50 can be smoothened. Therefore, disturbance in air flow is not easily generated in the air flow channel 50, and variations in acoustic characteristics of the horn apparatus 10 can be suppressed.