Abstract: The present invention is a sound delivery system for use to deliver live and pre-recorded sound, including stories, music, soothing background sounds, radio, streaming audio, television, from a person located anywhere from near or remote distances through audio transport networks, through a proximity antenna pad device, to a pillow, or like headrest, or stuffed object including stuffed animals to a person's head located adjacent to the pillow or like stuffed object. The pillow sound delivery system comprises an audio transport network and a pillow, or like stuffed object, with a passive pillow speaker receiver inside the pillow, and a proximity antenna device outside the pillow to transmit from the audio transport network to the pillow speaker receiver.

Abstract: A system for generating at least one remote virtual speaker location in connection with at least a partial reflective environment (12, 12, 14 or 15) in combination with an audio speaker for creating multiple sound effects including a virtual sound source from the reflective environment which is perceived by a listener (53) as an original sound source, by generating a primary direct audio output by emitting audio compression waves toward a listener, and generating a secondary indirect audio output from at least one virtual speaker (24, 25 or 26) remote from the audio speakers, by emitting ultrasonic sound from at least one parametric speaker (20, 21 or 22) associated with the audio speakers and oriented toward at least one reflective environment which is remote from the audio speakers

Abstract: A remote control system, which is adapted for wirelessly communicating an earphone with an audio/video system having an audio signal output, includes an audio signal transmitter adapted for operatively connecting to the audio signal output of the audio/video system so as to transmit an audio signal therefrom, and a remote control unit wirelessly connecting to the audio signal transmitter. The remote unit includes, a control circuit for wirelessly operating the audio/video system, and an audio signal receiver including a signal receiving circuit wirelessly communicating with the audio signal transmitter for receiving the audio signal therefrom in a wireless manner, and a signal outlet electrically connected to the signal receiving circuit for connecting with the earphone so as to transmit the audio signal from the audio/video system to the earphone in a wireless manner.

Abstract: A remote control system, which is adapted for wirelessly communicating an earphone with an audio/video system having an audio signal output, includes an audio signal transmitter adapted for operatively connecting to the audio signal output of the audio/video system so as to transmit an audio signal therefrom, and a remote control unit wirelessly connecting to the audio signal transmitter. The remote unit includes, a control circuit for wirelessly operating the audio/video system, and an audio signal receiver including a signal receiving circuit wirelessly communicating with the audio signal transmitter for receiving the audio signal therefrom in a wireless manner, and a signal outlet electrically connected to the signal receiving circuit for connecting with the earphone so as to transmit the audio signal from the audio/video system to the earphone in a wireless manner.

Abstract: A digital wireless loudspeaker system includes an audio transmission device for selecting and transmitting digital audio data, and wireless speakers for receiving the data and broadcasting sound. The audio transmission device selects digital audio data together with a sample clock from a stereo compact disk, or decoded DVD data. The sample clock clocks an element that generates frames of data and adds error protection. Status messages are included in the transmission frames to control speaker attributes such as speaker group, enabling or disabling a sub-woofer, and volume of the loudspeaker digitally. These transmission frames are clocked into an RF transmitter and transmitted to the speakers. The received bit stream and symbol clock are output from the RF receiver in each speaker and input to a framing and error protection decoder and a sample clock generator. The recovered audio sample data and sample clock are input to a digital to speaker input conversion and channel selector.

Abstract: A data communication system for outputting a multimedia source to occupants of a vehicle comprising an emitter unit centrally located within an interior of the vehicle and in close proximity to a headliner of the vehicle wherein the emitter unit is responsive to a data signal to transmit an infrared signal. The emitter unit further includes a source of the infrared signal in a central core of the emitter unit and directs the infrared signal in a radial direction toward an outer perimeter of the emitter unit with a first field angle. A curved deflector located on the outer perimeter of the emitter unit deflects the infrared signal throughout the interior of the vehicle with a second field angle larger than the first field angle.

Abstract: Techniques for providing wireless delivery of audio sounds from audio systems to personal audio devices are disclosed. These techniques can permit users of the personal audio device to be mobile yet still acquire the audio sounds. These techniques can also optionally provide customization (or personalization) of the audio sounds to the user's hearing and/or modification of the audio sounds in view of environmental conditions. According to one aspect of the invention, audio output from an audio system or a personal audio device can be delivered in a directionally constrained manner. According to another aspect of the invention, a wireless adapter can serve as an after market modification to an audio system.

Abstract: A directional audio apparatus that provides directional delivery of audio output is disclosed. The audio output is targeted to those one or more persons desirous of hearing the audio output. Consequently, other persons not desirous of hearing the audio output do not receive substantial amounts of the audio output and thus are less disturbed by the unwanted audio sounds. In one embodiment, the directional audio apparatus includes a directional speaker, whose audio output is generated through ultrasonic signals. The directional speaker includes a number of speaker elements. A number of the attributes of the audio output can be controlled, either by a user or by monitored measurements. Such attributes include the beam width, the beam direction, the degree of isolation or privacy, and the volume of the audio outputs. The audio output can also be personalized or modified according to the audio conditions of the surroundings of the apparatus.

Abstract: An electronic apparatus has a main body, and a speaker unit detachably mounted to the main body. The speaker unit includes a speaker, a first wireless communication unit, and a D/A converter. The electronic apparatus also has a second wireless communication unit which transmits an audio digital signal to the first communication unit over a wireless cannel, a detector which detects whether or not the speaker unit is installed in said main body, and a controller which actuates the second wireless communication for transmitting the audio digital signal to the first communication unit when the detector detects that said speaker unit is not installed in said main body. The D/A converter converts the audio digital signal received by the first communication unit to an audio analog signal, and the speaker outputs sound on the basis of the audio analog signal.

Abstract: A multiple wireless microphone speakerphone system includes one or more wireless microphones. The wireless microphones accept speech and transmit the speech to receivers, one receiver corresponding to each wireless microphone. Audio processing and acoustic echo cancellation (AEC) are performed on the received speech signals. A signal handling unit generates an audio signal after echo cancellation. The generated audio signal is transmitted to a far end to be played through, for example, a speaker or an ear piece.

Abstract: Audio systems using a digital audio interface between a sender and a receiver are known. Due to the digital revolution, it is very easy to make copies of copyright protected work. By using a bi-directional control bus in the audio interface, it is made possible to send audio signals with a standard quality to “normal” receivers audio, and higher quality audio to receivers which are authorized to receive higher quality audio.

Abstract: According to this invention, instead of a conventionally used wire, a radio transmitting medium is employed as a transmitting medium for transmitting information containing sound signal between a sound input unit for inputting the sound signal generated in a sound generating source and at least one sound output unit.

Abstract: A remote speaker system (14) for an automotive vehicle (10) has a holder (22) fixedly mounted within the vehicle (10). A speaker assembly (19) having a speaker housing (20) coupled to holder (22) and a speaker (26) coupled within the housing (20). A receive circuit (48) is coupled within the housing (20) and is electrically coupled to the speaker (26). A control circuit has an audio receiver generating audio signals and a transmit circuit (44) transmitting a wireless communication signal in response to the audio signal. The receive circuit (48) receives the wireless communication signal and converts the wireless communication signal into an audio electrical signal. The speaker converts the audio electrical signal into an audible signal.

Abstract: The present invention provides a method for automatically configuring a speaker system. The method includes the steps of placing a radio frequency identification (RFID) tag on a speaker of the above mentioned speaker system, placing a wireless communication device in a location representing the most likely location of the listener, determining the distance from the device location to the speaker using the RFID tag and said wireless communication device, and transmitting the determined distance from location representing the most likely location of the listener to the speaker to the speaker system controller.

Abstract: A method and an apparatus for providing audio information to a user. The method and apparatus provide information in a manner consistent with a spatial metaphor, allowing a user to visualize and more easily navigate an application. The information is preferably presented to the user as a background audio prompt that indicates the environment and a foreground audio prompt that indicates the alternatives available to the user.

Abstract: A multi-channel wireless audio system has a signal broadcasting circuit that includes a multiplexer having a plurality of input nodes and one output node, each input node being used to receive audio signals of an audio channel, the output node being used for outputting audio signals of a selected audio channel, an analog to digital converter for converting the audio signals of the selected audio channel into digital audio signals, and a first transceiver for wirelessly transmitting the digital audio signals to external speakers. The multi-channel wireless audio system also includes several wireless speaker modules, each including a second transceiver for receiving the wireless digital audio signals from the signal broadcasting circuit, a digital to analog converter for converting the digital audio signals into analog audio signals, an amplifier for amplifying the analog audio signals, and a speaker for converting the amplified analog audio signals into sound.

Abstract: A multi-channel wireless audio system includes a sound card for a computer. The sound card includes a signal broadcasting circuit having a first transceiver for wirelessly transmitting digital audio signals to external speakers, a sound chip electrically connected to the signal broadcasting circuit for processing audio signals sent to the signal broadcasting circuit, and an interface connection for connecting the sound card to the computer. The multi-channel wireless audio system also includes a plurality of wireless speaker modules, each including a second transceiver for receiving the wireless digital audio signals from the signal broadcasting circuit, a digital to analog converter for converting the digital audio signals into analog audio signals, an amplifier for amplifying the analog audio signals, and a speaker for converting the amplified analog audio signals into sound.

Abstract: A wiring system for AV devices uses a plurality of connector terminals installed on the walls of a room in which AV devices and speakers are placed, and an external cable is used for connecting the connector terminals. As the connections of the AV devices and speakers are made out of the room using the external cable, it is possible to keep the internal appearance of the room ordinarily neat no matter how many devices are connected to the system.

Abstract: The present invention relates to a drive-in movie theater and/or events center preferably located on top of one or more parking garages located at a shopping mall or other similar complex. The drive-in theater preferably has a short range radio broadcast system that can send radio signals to cars on the parking garage, wherein movie-goers can listen to the movie sound tracks on their own car stereos/radios. When needed, the present system contemplates having more than one transmitter, each operating at the same or different frequency, so that the effective service range of each transmitter can be made within limited guidelines set by the FCC. The drive-in theater can be combined with an events center and connected to a shopping mall where access to restaurants and retail establishments can be provided.

Abstract: This disclosure relates to a design for the circuit required to drive electrostatic loudspeakers. Such speakers require a high voltage audio signal, typically generated using a wideband, high power step-up transformer. The design eliminates the requirement for such a transformer by mixing the audio frequency signal with a high frequency carrier. This modulated signal may then be amplified and transformed to a high voltage signal using a much more modest transformer operating at the carrier frequency. A simple detection circuit then recovers the original audio waveform from the modulated signal and drives the electrostatic loudspeaker. Such a circuit may be cheaper than a wideband transformer and may also improve the frequency response of the driving electronics.

Abstract: An audio system with wireless speakers eliminates the long audio signal transmission lines between the amplifier and speakers. Sending the radio frequency signal from the amplifier to speakers utilizes wireless communication technique. Therefore, the problems in moving, assembling, and setting up the audio system can be solved.

Abstract: A voice interface structure for a cellular phone that permits two-way operation or can be provided at where opposite to the keypad of the cellular phone, wherein, both of the voice interface and control keypad are arranged in two-ways or facing away from each other so that when the keypad control and operation. as well as the use of the voice interface, the case of the cellular phone is used as a screen to reduce the electromagnetic wave the head of the user is exposed to without compromising the convenience of key entering and executing of transmission and receiving.

Abstract: A sound masking system according to the invention is disclosed in which one or more sound masking loudspeaker assemblies are coupled to one or more electronic sound masking signal generators. The loudspeaker assemblies in the system of the invention have a low directivity index and preferably emit an acoustic sound masking signal that has a sound masking spectrum specifically designed to provide superior sound masking in an open plan office. Each of the plurality of loudspeaker assemblies is oriented to provide the acoustic sound masking signal in a direct path into the predetermined area in which masking sound is needed. In addition, the sound masking system of the invention can include a remote control function by which a user can select from a plurality of stored sets of information for providing from a recipient loudspeaker assembly an acoustic sound masking signal having a selected sound masking spectrum.

Abstract: An array of speakers are fed from a single source of audio frequency sound but each speaker transmits the sound delayed by an amount which is determined by the distance between a particular speaker and a selected region in space, so that sound from each speaker constructively adds at the selected region in space. A sufficiently large number of speakers are employed so that when sound reaches a region in space at the same moment in time the audio volume will be increased substantially over sound in regions where there is not constructive interference. This simple technique allows audio frequency sound to be heard in only selected regions within the room or other auditory space. Multiple regions with multiple soundtracks can be created by simultaneously playing variously delayed soundtracks over each of the speakers in the array.

Abstract: A parametric loudspeaker system using improved modulators to compensate for the non-linearity of the parametric process in air when driving the air at saturation levels and below saturation levels. The parametric loudspeaker uses a pre-processed single sideband modulator that offers ideal linearity as characterized by square root pre-processed double sideband modulators but with a lower carrier frequency and without the wide bandwidth requirements. By eliminating some or all of the lower sideband the carrier frequency can be reduced without producing sideband frequencies in the audible range. Lower operational frequencies result in greater translation efficiency and greater output capability before reaching the saturation limit of air. A pre-processor minimizes the effects of saturation limits for double sideband, truncated double sideband or single sideband processing to achieve superior output.

Abstract: Talking toilet paper holder with a hollow toilet paper holding spindle having closed ends, one said end having a compressable spring mounted shaft capable of inserting into a standard toilet paper roll holder, the opposite the end having a fixed shaft member extending from the opposite ends' center capable of inserting into the opposite end of a standard toilet paper roll holder. An electronic digital recording and playback mechanism housed within said paper holding spindle is activated by a record button flush with the surface of said hollow spindle. A power source such as a plurality of batteries are contained within said hollow spindle. A speaker is mounted flush with the inside wall of said opposite end of said spindle. A plurality of apertures in said opposite end enables a voice message to emit from said speaker through said end wall to the outer environment.

Abstract: This invention discloses a wireless adapter for use in wireless audio systems. The invention incorporates a radio frequency receiver, an amplifier, a modulator, a standard speaker-wire output port, and a power system. The radio frequency receiver provides for reception of transmitted audio information in remote locations. The amplifier increases the magnitude of the signal from a radio frequency transmitter. The modulator alters the received information digital or otherwise into a format usable to standard wired audio speakers. The output port provides for a means of connecting standard speaker wire from the invention to standard wired speakers. And the power system connects the invention to an external power source vis-Ã-vis a standard power wire or power plug.

Abstract: A wireless personal communication system includes an earpiece, worn in or behind the ear, that communicates wirelessly with a remote processor unit (RPU) worn at the neck. The RPU is a wearable computer in the form of a necklace, neck ribbon, collar or other flat, flexible article that may be worn under clothing to hide it from view. The close proximity of the earpiece to the RPU, combined with the large antenna aperture area available in this RPU form, enables the use of radar technology to implement a two-way wireless link between the earpiece and RPU, and also allows earpiece operating power to be beamed from the RPU. The resulting size and cost reductions in both the earpiece and RPU allow the manufacture of disposable hearing aids and, when the RPU is equipped with secondary wireless link circuitry, cellular telephones and pagers.

Abstract: A Wireless Concealed Transmitter Stereo Center Speaker System includes a concealed transmitter unit installed a center speaker, and two receiver units installed in two rear speakers, wherein the concealed transmitter unit includes an automatic audio level regulating circuit to regulate the audio level of the output signal of audio equipment to a predetermined range, a power control circuit controlled by the output signal of the audio equipment to provide the necessary working voltage, and an inductance antenna to transmit stable output signal from the audio equipment to the receiver units of rear speakers; the receiver units are of low working voltage design, including an automatic 24-time frequency divider circuit to effectively discriminate left and right sound tracks, and an auto-shut off circuit to automatically cut off power supply from either an alternating current source or battery power supply when the audio equipment does not work; the concealed transmitter unit and the receiver units further use a r

Abstract: A wireless transmitter includes an antenna and a signal generator. A control signal input to the signal generator controls a frequency band of a carrier freuency. The control signal also controls the transmitted signal power. The control signal is generated by a decoder unit that decodes an audio signal.

Abstract: A biaxial parametric speaker having at least two different axes of sound propagation. The speaker includes a first parametric emitter including an ultrasonic emitter surface having a primary direction of propagation along a first orientation and a second parametric emitter including an ultrasonic emitter surface having a primary direction of propagation along a second orientation. The first parametric emitter is physically coupled to the second parametric emitter such that the first and second orientations do not coincide, thereby providing for relative angular displacement of the respective first and second orientations of propagation. Electronic contacts are attached to the respective first and second parametric emitters for coupling to a parametric signal source capable of generating parametric emissions from the respective emitters which decouple in air to generate audio output along each of the respective first and second orientations.

Abstract: A system for generating at least one remote virtual speaker location in connection with at least a partial reflective environment in combination with an audio speaker for creating multiple sound effects including a virtual sound source from the reflective environment which is perceived by a listener as an original sound source, by generating a primary direct audio output by emitting audio compression waves toward a listener, and generating a secondary indirect audio output from at least one virtual speaker remote from the audio speakers, by emitting ultrasonic sound from at least one parametric speaker associated with the audio speakers and oriented toward at least one reflective environment which is remote from the audio speakers, thereby indirectly generating sound from a reflective environment which is perceived as a virtual speaker, and synchronizing the primary audio output of the audio speakers with a secondary audio output from the at least one virtual speaker such that the listener hears a plurality o

Abstract: An apparatus and method for providing a centralized speaker system that allows multiple speakers connected to a central amplifier speaker line to be monitored and controlled from a central location via a master/slave protocol. The centralized speaker system comprises a central station for selectively communicating at least one of a command and an information signal to a destination device. A tone generator is adapted to communicate an activation tone to the destination device. An amplifier, which is colocated with the central station, is adapted to amplify the signals to the destination device.

Abstract: An audio distributor includes a rotor disc rotatably supported by a stationary base. The rotor disc includes a shaft extending within the stationary housing and supporting at least one light emitting diode. Each light emitting diode supported on the shaft is positioned to operably interact with a plurality of photo resistors. Each photo resistor is connected between an input port and an output port for controlling the transfer of the audio signal from the input port to one of a plurality of output ports based on the level of light sensed by the corresponding plurality of photo resistors connected to the circuit for operably receiving the light emitted from the diode supported by the shaft.

Abstract: A process and a device for producing a directed audio sound (3) on the basis of an amplitude demodulated ultrasound carrier signal (2) of high intensity. Therein, in accordance with the invention, the sound emitted by the ultrasound emitter (1) is reflected by a reflector (5) to a new direction. By appropriate shaping of the reflector surface, the audio sound (3) can be focused. The level of the ultrasound carrier signal (2) can be dampened by coating of the reflector (5) with an appropriate absorptive material, so that in the ideal case only the acoustic audio signal (3) reaches of the listener (4).

Abstract: In the invention, it is possible to hear a voice and music of a portable audio device such as a portable telephone, an MD player, etc. in a hand free state without mounting an additional amplifier kind. Therefore, a plug transmitter is plugged into a cigar lighter socket arranged in a console portion or an arm of a side door. An external output terminal of a portable audio device such as an MD player is connected to the plug transmitter by an audio cable. A transmitting circuit is built in the plug transmitter, and receives electric power from the cigar lighter socket, and transmits an audio output from the portable audio device as a radio wave in a receiving frequency band of an AM radio mounted to an automobile. Thus, it is possible to enjoy music from a speaker within the automobile. If a portable telephone is connected to the plug transmitter, a talk can be carried out in a hand free state.

Abstract: An audio reproduction apparatus includes a primary audio amplifier having an output side for outputting audio signals, and a plurality of auxiliary audio amplifiers coupled electrically in series to the primary audio amplifier. Each of the auxiliary audio amplifiers has an input side for receiving the audio signals from the primary audio amplifier, a signal current generating device coupled electrically across the input side such that the audio signals pass through the signal current generating device, a current inducing device disposed adjacent to the signal current generating device for generating induced audio signals when the audio signals pass through the signal current generating device, an auxiliary amplifier coupled electrically to the current inducing device for amplifying and outputting the induced audio signals generated thereby, and a loudspeaker coupled electrically to the auxiliary amplifier for reproducing the induced audio signals amplified by the auxiliary amplifier.

Abstract: A parametric loudspeaker system is described which is based upon the FM-modulation of an ultrasound carrier. Known systems work with AM-modulation. The FM-modulation produces a good matching to the resonant transducer such as the conventionally employed piezo-ceramic transducers. The resonance slope of the transducers is used for FM/AM-conversion. This FM-resonance principle can advantageously be employed in a multi-path loudspeaker system, in which the transducer works in the optimal resonance range in each of the paths. With the conventional AM-modulation this is not possible. The FM-resonance principle can also be used in resonance-free or resonance-poor transducers, such as for example electrostatic transducers.

Abstract: A method and system for reconfiguring a multi-dimension sound system is disclosed. The method and system include a remote control that is capable of emitting a low-frequency sound wave pulse pattern, and a plurality of speakers, wherein each speaker includes a pulse counter that counts a number of sound wave pulses received from the remote control over a predetermined time period. The method and system further include an audio receiver that includes a digital audio encoding system. The receiver uses the respective sound wave pulse count from each of the speakers to compute the distance between the remote control and each speaker, and programs the digital audio encoding system with speaker delay times based on the computed distances.

Abstract: An arrangement of parametric loudspeakers is described, in which the totality of the transducers is subdivided into groups, wherein each group is controlled by at least one modulator associated therewith, so that a parametric multi-path loudspeaker system results. Thereby it is made possible, that for each of the paths the transducer operates in the optimal resonance range.

Abstract: An audio amplifier configuration for a personal computer system optimizes performance in both the single-ended mode and the bridged mode. In a single-ended mode, as when the computer system user receives audio through headphones plugged into an external jack, a jack sense line is activated that switches into operation a power supply that is optimized for single-ended audio operation. In the bridged mode, as when the computer user receives audio from the system's internal speaker, operation is such that the audio amplifier is supplied by a power source optimized for operation in a bridged mode. In general, single-ended operation dictates that the audio amplifier power supply exhibit substantial noise immunity characteristics; whereas bridged-mode operation requires that the power supply be capable of supplying more demanding peak voltage and current excursions.

Abstract: A process for the configuration of a public address system with at least one speaker box (8) and one amplifier (1) including a DSP (2.2) in the audio signal path supplying the speaker box (8) with an audio signal uses data that are transmitted by the speaker box (8) transmitted to the amplifier (1). Using these data, signal processing adapted to sound technology and/or electrical characteristics or surrounding conditions of the speaker box is adapted in the DSP (2.2), possibly in other functional elements of the amplifier (1). The data concern desired signal processing in the amplifier and are structured in a data format not specific to the DSP. They are converted in the amplifier (1) into DSP-specific parameter data. For the data conversion, interpretation data contained in the amplifier (1), which data relate to information concerning the DSP (2.2), possibly to additional functional elements in the amplifier (1), are used.

Abstract: When a person first enters an unfamiliar work space, it is useful for that person to know what devices are present in the space and often the person will spend the first few minutes looking around, effectively carrying out an inventory of the devices present. In order to simplify this process the devices are arranged to announce their existence by sound in response to a prompt, such as a handclap. To avoid the announcements being made all at once in an unintelligible manner, the devices interact with each other to order their announcements so that each device announcement is, at least in due course, made uninterrupted by announcements from other devices. Typically, this interaction involves the devices using a collision-detection and back-offprotocol applied to the announcements themselves.

Abstract: A system for generating at least one remote virtual speaker location in connection with at least a partial reflective environment in combination with an audio speaker for creating multiple sound effects including a virtual sound source from the reflective environment which is perceived by a listener as an original sound source, by generating a primary direct audio output by emitting audio compression waves toward a listener, and generating a secondary indirect audio output from at least one virtual speaker remote from the audio speakers, by emitting ultrasonic sound from at least one parametric speaker associated with the audio speakers and oriented toward at least one reflective environment which is remote from the audio speakers, thereby indirectly generating sound from a reflective environment which is perceived as a virtual speaker, and synchronizing the primary audio output of the audio speakers with a secondary audio output from the at least one virtual speaker such that the listener hears a plurality o

Abstract: The present invention is a method and apparatus for simply and inexpensively enhancing an electronic audio signal in such a way that the quality of audible sound produced from the audio signal more closely approaches that of the original sound heard live in an acoustically designed environment. The present invention restores the perception of harmonics that are normally missing in an electronic audio signal. The apparatus includes a circuit that causes an input audio signal to be distorted such that an enhanced audio signal is produced that exhibits an improved harmonic quality compared to that of the original input audio signal. This distortion is a non-linear amplification of enhancing harmonics or frequencies in the input audio signal. That is, a band of desirable harmonics or frequencies in the input audio signal are non-uniformly amplified across the band. This band of frequencies from the input audio signal can be a band of high frequencies and/or a band of low frequencies.

Abstract: A method for providing multiple speaker locations around a listener in a room with a sound source at a single location.

Abstract: A stereophonic magnetic induction sound system is disclosed which has an audio source, two ear pieces, each having an inductive pick-up coil, and a magnetic induction transmitter connected to the audio source and capable of transmitting different signals to the pick-up coils in the two ear pieces. The transmitter may have two or more antennas, a first conductor for transmitting one signal to one of the antennas, a second conductor for transmitting a different signal to the other antenna, and grounds connected to each antenna. The antennas are comprised of a core with a wires coiled about the core and are shaped and positioned on a user's neck to, at least partially, selectively transmit their respect signals toward a particular, near-by pick-up coil. A connector or stereophonic jack is used to connect the transmitter to an audio source, and a supporting member secures the antennas around a user's neck and restricts movement of the antennas relative to the neck.

Abstract: A transmitter for transmitting an audio signal derived from an audio appliance to an FM (frequency modulation) radio includes a transmitter circuit for converting the audio signal derived from an audio appliance into an FM signal within an FM broadcasting band to thereby transmit the FM signal, a receiver circuit having at least a tuner unit; a display for displaying thereon a frequency; and a control circuit for controlling a transmission frequency of the transmitter circuit and a reception frequency of the receiver circuit. The control circuit causes the receiver circuit to detect an unused frequency within the FM broadcasting band and to set a frequency corresponding to the detected unused frequency to the transmission frequency, and also causes the display to display thereon the set transmission frequency.

Abstract: The present invention is the emission of new sonic or subsonic compression waves from a region resonant cavity or similar of interference of at least two ultrasonic wave trains. In one embodiment, two ultrasonic emitters are oriented toward the cavity so as to cause interference between emitted ultrasonic wave trains. When the difference in frequency between the two ultrasonic wave trains is in the sonic or subsonic frequency range, a new sonic or subsonic wave train of that frequency is emitted from within the cavity or region of interference in accordance with the principles of acoustical heterodyning. The preferred embodiment is a system comprised of a single ultrasonic radiating element oriented toward the cavity emitting multiple waves.

Abstract: A audio enhancement system and method of use with a sound system for producing primary sound from at least one main loudspeaker located at a main position. The audio enhancement system comprises at least one wireless transmitter, time delay circuitry, and plural augmented sound producing subsystems. Each sound subsystem is a portable unit arranged to be carried by a person located remote from the main loudspeaker and includes a wireless receiver and an associated transduce device, e.g., a pair of stereo headphones. The transmitter broadcasts an electrical signal which is representative of the electrical input signal provided to the main loudspeaker. The broadcast signal is receiver by the receiver and is demodulated and amplified to drive the transducer so that it produces augmented sound substantially in synchronism with the sound arriving from the main loudspeaker.