Abstract: An audio projection device having additional features or elements connected therewith. One or more lights or other illuminating elements may be connected with the audio projection device. The one or more lights or other illuminating elements may be disposed so as to illuminate through a portion of the audio projection device. One or more audible or other moveable elements may be connected or contained within a portion of the audio projection device. The one or more audible or moveable elements may be beads, or other spherical or other shaped components (e.g., rigid components) that are configured to make a sound (e.g., rattle) and/or be visible when they make contact with one another and/or other portions of the audio projection device. The audio projection device may be fully or partially transparent such that the one or more audible or moveable elements are viewable through material(s) of the audio projection device.

Abstract: A system providing various improved processing techniques for haptic feedback is described. An acoustic field is defined by one or more control points in a space within which the acoustic field may exist. Each control point is assigned an amplitude value equating to a desired amplitude of the acoustic field at the control point. Transducers are then controlled to create an acoustic field exhibiting the desired amplitude at each of the control points. When human skin interacts with the acoustic field, vibrations of the skin are interpreted by mechanoreceptors being excited and sending signals to the brain via the nervous system. Improved processing techniques allow for more efficient real-world operation.

Abstract: The invention relates to a protective helmet, in particular a protective motorcycle helmet, comprising an outer shell (1) for distributing impact forces, a battery socket (2), which is firmly connected to the outer shell (1), for detachably accommodating a battery (3), and a line assembly (4), which is electrically connected to the battery socket (2), for supplying electricity by means of the accommodated battery (3) to an electric apparatus (5) which is mechanically coupled to the outer shell (1).

Abstract: A voice amplification apparatus is provided and configured to attach to a portion of a personal protective equipment (PPE) device such that the apparatus is hands-free and in close proximity to a user's mouth. The voice amplification apparatus comprises a speaker and microphone in various positions, wherein the microphone is configured to capture the user's voice which is amplified and projected out of the speaker. In this way, the user can be clearly heard by those in proximity to the user. Advantageously, the usefulness of the apparatus will prevent users from lowering their PPE to communicate which poses a safety hazard during a pandemic, such as COVID-19.

Abstract: A rugged megaphone comprising a body, two opposing handles and a horn and further comprising a rim bumper attached to the tip of the horn; providing a megaphone of superior durability.

Abstract: An audio control system installed on an electronic device includes a switch switching between a first mode and a second mode, a switching module, a microphone, a microphone control module, a speaker, a speaker control module, a signal radiating module, and a signal receiving module. When the switch is switched to the first mode, the switching module controls the microphone control module to transmit audio data of microphone to the signal radiating module to radiate the audio data via a wireless network. When the switch is switched to the second mode, the switching module controls the microphone control module to transmit the audio data of microphone to the speaker to make sound via the speaker control module.

Abstract: A rugged megaphone comprising a body, two opposing handles and a horn and further comprising a rim bumper attached to the tip of the horn; providing a megaphone of superior durability.

Abstract: A method and apparatus is taught for a signal processing breakthrough that significantly alleviates the “Curse of Dimensionality” (COD) in the characterization of nonlinear physical systems; namely, the reduction in the number of coefficients used to describe the higher order (i.e., nonlinear) kernels in the Volterra series expansion. The latter technique provides the means to evaluate simultaneously from a wide band excitation, all the inter-modulation products up to a specified order by greatly reducing the number of coefficients in the higher order kernel estimation to a manageable set that can be easily manipulated by current personal computers used to enhance a finite element (FE) model that generates a bio-inspired acoustic transducer model.

Abstract: A gas sensor manufacturing method including the following steps: providing a SOI substrate, including an oxide layer, a device layer, and a carrier, wherein the oxide layer is disposed between the device layer and the carrier; etching the device layer to form an integrated circuit region, an outer region, a trench and a conducting line, the conducting line including a connecting arm connecting to the integrated circuit region, the trench is formed around the conducting line and excavated to the oxide layer for reducing power consumption of the heater circuit, the connecting arm reaches over a gap between the integrated circuit region and the outer region and electrically connects to the integrated circuit region; coating or imprinting a sensing material on the circuit region; and etching the carrier and the oxide layer to form a cavity to form a film structure suspended in the cavity by the cantilevered connecting arm.

Abstract: A loudspeaker has a horn adapted to both cause air drag and to direct acoustic waves. A speaker and signal generator are electrically coupled to the speaker and secure to the horn. The loudspeaker is transported over a target and dropped from a high elevation. Upon landing the loudspeaker commences broadcasting a message. A shock absorber may secure to the horn and absorbs some of the shock of impact. Contact sensors or motions sensors may trigger broadcasting a message from the speaker. A portion of the horn may be expandable to increase the size of the horn upon deployment or upon impact with the ground.

Abstract: A broadband sound generator and transmitter provides minimal attenuation of sound over the distance between the generators and a point at a selected distance. The transmission component includes a parabolic dish and a positionable framework for the sound generators. The sound generators are positioned in front of the dish and oriented to direct sound into the dish for reflection toward a target. Drive signal conditioning circuitry apportion components of the drive signal to the several sound generators and adjust the signal in terms of delay and phase to accommodate changes in position of the generators relative to the dish.

Abstract: A horn and a loudspeaker employing the horn are disclosed that include a body having a throat that expands outwardly to a mouth such that a first interior area defined by the throat is smaller than a second interior area defined by the mouth. A plurality of raised surface areas is located on an interior surface of the body. The raised surface areas extend into a hollow interior defined by the body a predetermined distance and are utilized to channel sound waves through the body and out the mouth.

Abstract: A voice amplifier for attachment to a mask has a sound reflector that faces outwardly of the mask when the voice amplifier is attached to the mask. A speaker faces inwards towards the sound reflector. Sound waves emanate from the speaker inward towards the sound reflector, reflect off the sound reflector and exit the voice amplifier through an outer peripheral gap and travel outwardly from the mask. The voice amplifier has an on/off switch mounted on the front of the voice amplifier. The voice amplifier cover has a front wall with a front surface facing away from the mask. The narrow end of the speaker is located closer to the front wall of the cover than the wide end. The cover front wall follows the profile of the speaker in a direction from the narrow end to the wide end of the speaker.

Abstract: An output reducing system for a telephone system, e.g., implemented in a headset, includes an input line and an output line, wherein the input line transmits an incoming signal to an output transducer and the output line transmits an outgoing signal from an input transducer, and a compressor system is provided in the input line for reducing the output signal level.

Abstract: A sound emitting device for providing at least one new sonic or subsonic frequency as a by-product of emitting a waveform of at least two ultrasonic frequencies whose difference in value corresponds to the desired new sonic or subsonic frequency. The device includes a parametric emitting perimeter or plurality of emitter segments positioned around a central open section. This open section is structured with a diagonal width greater than a cross-sectional diagonal of the parametric emitting perimeter. An ultrasonic frequency signal source and sonic/subsonic frequency generator are coupled together to a modulating circuit for mixing an ultrasonic frequency signal with an electrical signal corresponding to the at least one new sonic or subsonic frequency. The modulator output is coupled to the emitting perimeter which comprises ultrasonic frequency emitting material for propagating the mixed waveform into air for demodulating the waveform to generate the at least one new sonic or subsonic frequency.

Abstract: An improved light weight, portable public address system configured with high fidelity omni-directional and high wattage directional speakers for both indoor and outdoor use with a wide variety of sound inputs assembled in a self-contained, compact housing. Optional systems provide for the remote deployment of up to two speakers and the use of a remote wireless microphone. Improved options include a unique compact configuration that allows for modular construction of all components for plug and play operation and rapid field replacement; a weatherproof housing for operation in inclement weather, and a tape player to provide prerecorded programming.

Abstract: The megaphone includes a headset 1 incorporating a microphone 5 which is connected via a flexible cable 8 to a body pack 2. The body pack includes a housing 9 which incorporates a battery compartment, an amplifier, a siren and an on/off switch. The housing 9 is mounted on a belt 3 together with an audio output horn 12.

Abstract: An improved light weight, portable public address system configured with high fidelity omni-directional and high wattage directional speakers for both indoor and outdoor use with a wide variety of sound inputs assembled in a self-contained, compact housing. Optional systems provide for the remote deployment of up to two speakers and the use of a remote wireless microphone. Improved options include a unique compact configuration that allows for modular construction of all components for plug and play operation and rapid field replacement; a weatherproof housing for operation in inclement weather, and a tape player to provide prerecorded programming.

Abstract: The megaphone includes a headset 1 incorporating a microphone 5 which is connected via a flexible cable 8 to a body pack 2. The body pack includes a housing 9 which incorporates a battery compartment, an amplifier, a siren and an on/off switch. The housing 9 is mounted on a belt 3 together with an audio output horn 12.

Abstract: A sound emiting device for providing at least one new sonic or subsonic frequency as a by-product of emitting a waveform of at least two ultrasonic frequencies whose difference in value corresponds to the desired new sonic or subsonic frequency. The device includes a parametric emitting perimeter positioned around a central open section. This open section is structured with a diagonal width greater than a cross-sectional diagonal of the parametric emitting perimeter. An ultrasonic frequency signal source and sonic/subsonic frequency generator are coupled together to a modulating circuit for mixing an ultrasonic frequency signal with an electrical signal corresponding to the at least one new sonic or subsonic frequency. The modulator output is coupled to the emitting perimeter which comprises ultrasonic frequency emitting material for propagating the mixed waveform into air for demodulating the waveform to generate the at least one new sonic or subsonic frequency.

Abstract: A safety helmet for a bicyclist combined with a miniature public address (PA) system which makes it possible for the riding bicyclist to broadcast to those who are in the hearing range of the system. The helmet which is formed from an outer shell having a cushioning inner liner has extending therefrom a gooseneck supporting a microphone at a position adjacent the mouth of the bicyclist wearing the helmet. The microphone is connected by a line passing through the gooseneck and extending behind the helmet to a compact amplifier and loud speaker unit clipped onto the waist belt of the bicyclist. Power for the unit is supplied by a battery power back, included in the unit or incorporated in the frame of the bicycle.

Abstract: A sound projection device for use in speaking to one or more specific persons on a selective basis, the device including a housing having a directional aspect for aiming the housing at a target area, a gripping handle coupled to the housing to enable the device to be held in a user's hand, and a parametric speaker coupled to a front end of the housing for indirectly generating at least one new sonic frequency from at least two ultrasonic frequencies of different value. The housing includes a luminating source having a directional orientation substantially aligned with the directional aspect of the housing. The combination of light and directional sound source enables the user to visually identify the target area before transmitting the sonic frequency to the target.

Abstract: A portable voice amplifier includes a casing providing a housing and including a flat base, a curved front wall extending from the base upwardly and over the base, when viewed from the side, to the top of the unit. A speaker is mounted in the lower portion of the curved front wall, and the casing includes a lower section partially formed by the lower portion of the curved front wall and having a progressively narrow depth preceding from the base to approximately the midsection of the casing. An upper section of the housing has generally uniform depth and width from the midsection to the top of the unit. The upper section is designed to be held conveniently by the hand of the user, with a microphone located on the rear of the upper housing section so that in normal use the entire unit extends below the face of the user and is conveniently and comfortably held with a single hand.

Abstract: A voice transmission system for a protective respirator, having a face mask with an inhalation port and a filter attached to the inhalation port, is provided. The voice transmission system comprises a microphone assembly adapted to be located between the inhalation port and the air filter, the microphone assembly including a spacer for separating the filter from the inhalation port and a microphone extending therefrom and into an interior space of the face mask, and a combined amplifier/loudspeaker assembly remotely connected to the microphone. The spacer of the microphone assembly provides an airtight seal between the filter and the face mask and includes a one-way inhalation valve. The spacer is provided with an outer surface configuration which matches the face mask on one side and the filter on another so that the microphone assembly may be attached intermediate the face mask and the filter without using any additional fasteners.

Abstract: An output reducing system for a telephone system, e.g., implemented in a headset, includes an input line and an output line, wherein the input line transmits an incoming signal to an output transducer and the output line transmits an outgoing signal from an input transducer, and a compressor system is provided in the input line for reducing the output signal level.