Abstract: The metronome push cart is a cart. The metronome push cart is configured for use with a marching band. The metronome push cart comprises a cart structure, a rotating mount, a speaker, and a metronome. The rotating mount attaches to the cart structure. The rotating mount secures the speaker to the cart structure. The cart structure transports the speaker, and metronome while the marching band is performing. The metronome maintains an audible rhythmic sound used to coordinate the musicians in the marching band.

Abstract: The technology disclosed herein enables retention of a speaker on a mounting surface using a clip and a flange. In a particular embodiment, an apparatus includes a speaker comprising a substantially elliptic speaker frame. The apparatus further includes a mounting surface comprising a substantially cylindrical flange into which the speaker frame is positioned. Also, the apparatus includes a substantially elliptic clip positioned in the flange between the speaker frame and a retaining rim of the flange.

Abstract: Systems and methods for speaker assemblies with wide dispersion patterns are disclosed. In one embodiment, a speaker assembly includes at least two speaker drivers and a diffraction baffle affixed to each speaker driver, where each diffraction baffle includes a baffle face having a diffraction slot positioned over the driver and each diffraction baffle is affixed to and sealed to the driver, the area across each diffraction slot is less than the surface area of the driver, each diffraction slot provides a path for substantially all of the acoustic pressure waves produced by the speaker driver to propagate away from the driver and the acoustic pressure waves are within a frequency range determined by the characteristics of the driver, and the width of each diffraction slot in the horizontal direction is equal to the wavelength of a predetermined target frequency.

Abstract: A radial acoustic speaker assembly including a transducer and a plurality of segmented spiral horns acoustically coupled to the transducer. Each of the segmented spiral horns have an acoustical path. The plurality of segmented spiral horns include a first segmented spiral horn and a second segmented spiral horn. The first segmented spiral horn being adjacent to the second segmented spiral horn, and the first segmented spiral horn and the second segmented spiral horn have substantially identical shapes.

Abstract: Disclosed is an artificial intelligence hub including: a main body having a speaker for outputting sound; a communication module for wirelessly communicating with a surround ding device; a base arranged below the main body to support the main body; a cover coupled to a top of the main body, the cover having an upper surface for displaying a screen based on information exchanged via the communication module; and a grille having a vertically elongated cylindrical shape and provided with a plurality of through-holes therein, the main body being arranged within the grille, the grille being coupled at an upper end thereof to the cover housing and coupled at a lower end thereof to the base.

Abstract: 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.

Abstract: A positioning method for positioning two touch points of self-capacitive touch sensing devices is disclosed. The method includes: applying a first driving signals to the N rows of row sensors in sequence to determine the row sensors having the touch points; applying a second driving signals to the M columns of column sensors to determine the column sensor having touch points; applying a third driving signals to the row sensors or the column sensors; detecting a delay time period of the third driving signals within the row sensors or the column sensor so as to determine coordinates of the real touch points in accordance with the delay time period. In addition, a self-capacitive touch sensing device adopting the above method and a display device incorporating the above touch sensing device are also disclosed.

Abstract: A method and apparatus are provided for the controlled application of ultrasonic energy for conditioning of mixtures of gas and liquids by evolving and/or agglomerating gas bubbles existing with or in a liquid or for coalescing droplets of liquid dispersed in another liquid. The invention in preferred embodiments thereof comprises a coalescing apparatus for increasing the droplet size of a mixture formed as a liquid dispersed in another liquid, and a de-gassing apparatus arranged to evolve and/or agglomerate gaseous bubbles in a gas/liquid mixture. In the apparatuses, ultrasonic transducers are used to impart vibrational energy to the mixtures.

Abstract: An electromagnetic device includes a housing, a planar coil disposed inside the housing, and a magnetic diaphragm disposed inside the housing, wherein the plane of the planar coil is substantially in parallel with the plane of the magnetic diaphragm, wherein the planar coil is separated from the magnetic diaphragm, and wherein the magnetic diaphragm is moveable in the presence of an exterior pressure.

Abstract: The instant development relates to utilizing the sonic motion generated by a speaker to move objects in various directions in response to the variation in the frequency and amplitude of the sonic vibrations. This can be used to move objects in a linear and/or rotating manner. This is accomplished by the utilization of directionality oriented members.

Abstract: A sound-making device includes a hollow body closed at one end by an end wall and open at the opposite end; and a pulsator unit mounted centrally of the end wall; the pulsator unit having an inlet located externally of the hollow body for inletting a pressurized fluid in a continuous manner, and an outlet located within the hollow body for outletting the fluid in a pulsating manner effective to vibrate the end wall for generating sound waves. Also described is the use of such a device for protecting plants and ponds from birds or other animals.

Abstract: A system (and method) for workspace sound regulation, includes an office enclosure having a plurality of barriers, the barriers including reflective surfaces, and the reflective surfaces creating a plurality of preferred locations in the enclosure.

Abstract: A sound focusing device for use with a siren. The device is comprised of an adjustable baffle or damper reducing the velocity of air or sound eminating from a siren. The baffle or damper is positioned internal to the siren. A conical sound focusing trumpet is positioned co-axially and external to the siren. The baffle or damper is made up of two complementary disks forming at least one defined opening therein. The baffle or damper is selectively adjustable.

Abstract: An improved outdoor warning siren comprising an electromechanical siren together with a multi-segment horn which effects an exceptionally smooth transition from a small high pressure area at the horn inlet to a larger low pressure area at the horn outlet thereby producing increased sound output with reduced power requirements.

Abstract: A vehicle warning system (1) is disclosed. The device includes a main housing (2) to which is attached a sound generator (7), a lighting system (5), a mounting bracket (4) which is used to attach the device to an energency vehicle, and a trim ring (6) which conceals the mounting means of the device. As a sound signal is produced by the generator (7) it passes through a nozzle (9) and an aperture (14) into a deflector means (3) which is designed to expand and direct the sound signal through carefully proportioned chambers (30) and (33) of the deflector (3) so as to direct the sound signal against the closed portion (15) of expander horn (16) and out the open portion of the expander horn (16). In operation the sound generating system is attached to an amplifier of well known design and is capable of producing a variety of sound signals.

Abstract: An electronic horn of compact dimensions. Oscillator circuits coupled to a mixing node produce a multiple frequency signal used to drive a horn transducer. One horn replaces the two horns used in the prior art. A reverberating chamber in close proximity to the transducer includes a cone shaped structure having multiple spiraling reflecting walls connected to the convex surface of the cone. Sound waves emitted by the transducer reverberate within the chamber as they bounce off the reflecting walls.

Abstract: A low drag warning system for emergency vehicles having an aerodynamic design reducing turbulent flow past the housing for increased fuel economy and performance. The housing of the warning light system is provided with a pair of light globe compartments possessing an efficient aerodynamic design and a central speaker housing. The speaker housing has a downward sloped speaker grill to create a flow pattern also reducing drag. The air flow is introduced into the speaker housing with a ram effect. Outflow ports from the speaker housing circulate an air flow within the domes to prevent condensation and cool the components therein. The speaker mounted in the housing attains increased sound output using a relatively low power drive.

Abstract: The stator of the sound generator in the siren of this invention is mounted on struts that diverge upwardly from the top of an upright post, with its axis coinciding with that of the post. The coaxial rotor of the sound generator is driven by a motor mounted on top of the stator. Sound from the generator is concentrated and directed by a horn that flares along its length from a closed end portion to a mouth. The closed end portion is dome-like and concentrically surrounds and covers the sound generator, opening unrestrictedly downwardly into a bottom portion of the horn that curves along its length so that the mouth, which is wholly spaced below the sound generator, opens to one side of the post. The post extends through a bottom wall portion of the horn. Rollers supported by the stator engage a downwardly facing annular track surface in the closed end portion of the horn to support the horn for rotation, one roller being rotatably driven from the siren motor to rotate the horn during siren operation.

Abstract: An impulse noise generator having means to store a volume of compressed gas and suddenly to release same to eject through a nozzle (14) comprising a body (4) having a hollow stepped piston (1) arranged to move forward by gas pressure admitted through an inlet (9) when a spring-loaded valve (15) is closed and including a pressure chamber (7) to which gas is admitted through the valve (15) when the piston (1) is at the forward and of its stroke, and gas release means to cause the piston (1) to move back rapidly to exhaust the gas from the chamber (7) to the nozzle (14).

Abstract: An improved speaker grille for incorporation in the housing of a light/siren assembly of a type which is mounted across the roof of a police car or other emergency vehicle, the improved grille being designed to significantly reduce the drag coefficient of the light/siren assembly due to the unique location of the grille openings.

Abstract: An improved mounting for an acoustic pulsato rotor for suppression of spurious sounds utilizes a spring bias for axial thrust between the shaft ends and bearing cups. In one form, a plurality of thin spider legs extend from a rotor mounting panel in surrounding relationship to the rotor to provide the spring characteristics while being acoustically transparent to the sound radiation pattern that sweeps past. The spider legs have a quick fit, anti-noise twist lock connection to a central hub. Improved rubber-like grommets provide anti-shock and anti-noise mounting for the shaft. Improved rubber-like grommets in cooperation with a two part motor mounting provide anti-shock and anti-noise motor mounting without sacrifice of simple belt tension adjustment capability. A light weight back enclosure for the speaker acquires sound isolation characteristics of a sturdy structure by imposing stress on the enclosure.

Abstract: A tremolo effect producing system comprises at least one electro-acoustic transducer such as a loudspeaker for converting an electrical audio signal to a sound, at least one acousto-electrical transducer such as a microphone for converting sound to an electrical signal and disposed so as to face the loudspeaker, and at least one sound shielding member rotatably mounted between the above-mentioned two transducers and having sound transmitting openings or cutouts whereby sounds from the speaker will be periodically and/or individually interrupted with fade-in and fade-out effects as said member is rotated. These transducers and sound shielding member are sealed in a closed housing. Thereby the sound wave emitted from the speaker through the openings or cutouts of the rotating member is converted to an electrical signal with natural tremolo effects by the microphone. The thus-produced signal may be mixed with an audio signal with non-tremolo effect and amplified and reproduced by a loudspeaker.

Abstract: An omni-directional sound system having means to create a high compression zone of low-frequency sound and a speaker-baffle assembly rotatable in said zone and emanating high-frequency sound. A feature includes a grill assembly to create the compression zone. One embodiment includes two rotating speaker-baffle assemblies vertically spaced and another embodiment includes a pair of speaker-baffle assemblies rotating side-by-side. Another includes a speaker array directed to a common zone with a rotating speaker-baffle in that zone. Another embodiment includes a compact system having a drive motor arranged in the stationary speaker cone and directly connected to rotate the speaker-baffle.