Abstract: A method for controlling a vehicle to emanate an audible alert including determining when the vehicle is operating, and controlling a speaker system in the vehicle to emanate the audible alert outside of the vehicle when the vehicle is operating based on stored information representative of an internal combustion engine (ICE) noise profile. The audible alert has a sound profile including a simultaneous emanation of first, second and third audible frequency components having first, second and third frequencies, respectively, with the first and second frequencies emanating at first and second sound pressure levels greater than first and second representative sound pressure levels of the ICE noise profile at the first and second frequencies, respectively, and the third frequency emanating at a third sound pressure level less than a third representative sound pressure level of the ICE noise profile at the third frequency.

Abstract: A display component implements a text entry system for a device, such as a cell phone or other handheld device, has various layers that mimic characteristics of a conventional keyboard. A keyboard is displayed on a dynamic touch screen display. When a key is pressed by a user, the surface area of the key on the display depresses, thereby mimicking a conventional keyboard that would typically be used with a desktop or laptop computer. The display component is comprised of various layers or panels. One layer is a compressible touch sensitive or touch screen layer. Adjacent to this layer is a compressible display layer. Another layer is a deformable or cushion layer for supporting a specific weight, such as the weight of user fingers or hands. Adjacent to the deformable layer is a lower touch sensitive layer which has a coordinate system.

Abstract: To provide a sounder that outputs a predetermined alarm to notify an abnormality in a monitored region, and includes an output device-side connection terminal on a surface facing a predetermined installation surface, to structurally and electrically connect the sounder to a base-side connection terminal provided on a predetermined fitting base fixed to the installation surface. One of the base-side connection terminal and the output device-side connection terminal is configured using plural plates disposed in approximately parallel on the installation surface, and the other is configured using a plate sandwiched by the plural plates.

Abstract: A method of optimizing the operation of the power source of an electric vehicle is provided, where the power source is comprised of a first battery pack (e.g., a non-metal-air battery pack) and a second battery pack (e.g., a metal-air battery pack). The power source is optimized to minimize use of the least efficient battery pack (e.g., the second battery pack) while ensuring that the electric vehicle has sufficient power to traverse the expected travel distance before the next battery charging cycle. Further optimization is achieved by setting at least one acceleration limit based on vehicle efficiency and the state-of-charge (SOC) of the first and second battery packs.

Abstract: A purse system includes a first purse having a first connection point therein and a second purse, having a second connection point therein for removably attaching the second purse to a position within the first purse. The strap of the second purse includes a third connection point which interacts with the second connection point. The purse system can also include an alarm system.

Abstract: The invention relates to the representation of blood flow-related information using an X-ray image acquisition device. In order to provide an improved method in an X-ray imaging system for representing the blood flow, for vessel analysis purposes for example, a device and a method are provided where X-ray images are used to determine the spatial distribution of blood velocity. Using this information it is possible to artificially synthesize a sound defined by the visual spectrum determined by the velocity distribution. Providing sound information based on X-ray imaging technique allows cardiologists and neurologists, for example, an enhanced way of evaluating vascular lesions and a better control on quality of resulting blood flow.

Abstract: The invention relates to a device for protecting a photovoltaic plant (1) against rodent bite damage, wherein the photovoltaic plant (1) comprises several components, among them solar cells (2), a control unit (5), an inverter (7), an internal voltage supply means (13) and at least one microcontroller (9) which are interconnected via corresponding lines (3, 6, 8, 11). To provide such a device which offers an optimum protection against damage caused by bites and which entails as little maintenance and installation expenditures as possible, an ultrasonic transmitter (12) is provided for emitting an ultrasonic signal, and the ultrasonic transmitter (12) is connected to a microcontroller (9) of the photovoltaic plant (1) such that the ultrasonic signal emitted is controllable via the photovoltaic plant (1).

Abstract: An audible location alarm is generated from an ear-level device of a type comprising a memory, a microphone and a speaker, each coupled to a processor. Communication is established between the ear-level device and a companion device, the companion device having an interface, a display associated with the user interface, and an audible location alarm program stored therein. The audible location alarm program is initiated. An audible location alarm signal is transmitted to the ear-level device, thereby providing instruction to the ear-level device to broadcast an audible location alarm through the speaker of the ear level device until detection of an end event.

Abstract: A weather and bullet proof display system includes a casing that is nested within a headstone and has an opening formed therein. Solar panels are mounted on the headstone. A bullet proof shield is conjoined to the casing within the opening. A display screen is disposed behind the shield. A mechanism for converting solar energy to electrical energy is coupled to the solar panels and housed within the casing. A 12-volt rechargeable battery is coupled to the energy converting mechanism. A mechanism is included for converting a first DC voltage input level to a second DC voltage level, which is coupled to the solar energy converting mechanism. A system board is coupled to the DC voltage level converting mechanism and includes a mechanism for contemporaneously emitting a prerecorded audio and video output. Speakers are nested within the headstone and are coupled to the DC voltage level converting mechanism.

Abstract: A computer-implemented user interface method for managing directional user inputs is disclosed. The method includes receiving sliding motion by a user on a touchscreen of a computing device, identifying a direction for the sliding motion; associating the direction for the sliding motion with one of a plurality of directions for a directional pad, and providing information about the associated one of the plurality of directions to an application that is executing on the computing device.

Abstract: An alert device and method include an elongated cavity (306) and a loudspeaker (302) coupled to a first end portion of the cavity wherein sound produced by the loudspeaker is directed through the cavity to provide an audible sound. The cavity and the loudspeaker are configured and dimensioned to provide the audible sound substantially at an anti-resonant frequency (Fb) between first and second resonant frequency peaks for system impedance in a response spectrum for the loudspeaker and the cavity.

Abstract: A sound-emitting device (10, FIG. 1) may be mounted to a wall near places which will be unsuitable for the congregation of young person, such as outside shops and on street corners. The device generates sound waves at a frequency that is detectable by one or more subgroups of individuals within a group of individuals.

Abstract: Devices, systems, and methods for locating remote objects and notifying animals that alarms are active comprising detecting an alarm signal with an alarm sensor and a processor in communication with the alarm sensor and transmitting a locator signal and/or an audio signal having a frequency greater than 20 kHz in response to the detection of the alarm signal;

Abstract: Disclosed are methods and devices that include a therapeutic fluid dispensing device (10) to deliver a therapeutic fluid into a body of a patient. The device includes a controller to control one or more of fluid delivery operations and notification operations, at least one auditory notifier (800) to produce one or more acoustic signals in response to application of one or more activation signals by the controller and a plurality of electrical contacts coupled to the at least one auditory notifier to enable the application of the one or more activation signals to the at least one auditory notifier. The device also includes at least one housing retaining the at least one auditory notifier therein, the at least one housing being structured to resonate at least one of the one or more acoustic signals produced by the at least one auditory notifier in response to application of at least one of the one or more activation signals.

Abstract: Methods and systems are provided which generate an alarm signal that alerts individuals who may be in the vicinity of a reversing vehicle and that alerts a vehicle operator when the alarm signal is not audible due to high ambient sound levels or detritus covering the alarm transducer. A background noise level in proximity to the vehicle is monitored. A level of the alarm signal is increased as the ambient (or background) sound level rises. Conversely, the level of the alarm signal is reduced as the background noise level decreases. The alarm signal is changed in volume, frequency, or both based on a velocity of the vehicle. A frequency content of the alarm signal may be modified if a spectral profile of an ambient sound field contains spectral components that may mask the alarm signal.

Abstract: The presently disclosed embodiments, as well as features and aspects thereof, are directed towards providing a device that can produce an audible, and adjustable, noise signal or annunciation in response to being energized by an electrical circuit. Generally, embodiments of a circuit buzzer are useful for remote determination of a circuit's state, i.e. whether the circuit is “live” or “dead.” Embodiments of a circuit buzzer, at a minimum, may comprise components operable to electromechanically produce an audible signal. Further, embodiments may comprise an adjustable housing aspect, such as a housing having a base configured to receive a threaded top piece, useful for varying the decibel level of any produced audible signal. Even so, it is anticipated that some embodiments may comprise additional features and aspects such as, but not limited to, circuit connection adaptor components, LEDs, transformer circuitry, speakers, computer readable mediums, processors, electronics, etc.

Abstract: A method, apparatus, and computer program product for processing health management data for a vehicle. A plurality of modulated signals is received on a bus system in the vehicle. The plurality of modulated signals contains health management data from a plurality of data acquisition units. Each modulated signal has a different frequency from another modulated signal in the plurality of modulated signals to form a plurality of frequencies. The plurality of frequencies is selected to avoid interference with other data transmitted over the bus system by a plurality of data processing systems in the vehicle. The plurality of modulated signals is processed based on the plurality of frequencies used to transmit the plurality of modulated signals.

Abstract: A doorbell chime (100) can comprise a chassis (101), a cover (104) having a mechanical-cover identifier (105, 106), a mechanical-cover identifier detector (103) (to detect when the cover is at least substantially disposed in the installed position), and a chime (102) mounted in the chassis. This chime is configured to operate in a first mode of operation (302) when the mechanical-cover identifier detector detects the cover and in a second mode of operation (303) (that is different than the first mode of operation) when the mechanical-cover identifier detector does not detect the cover.

Abstract: Drag experienced by a vehicle travelling through an environmental media, such as air, is actively modulated by an energy beam which may either increase or decrease the drag. The energy beam may provide either a chemical, acoustic, or electromagnetic energy at a transition region between turbulent and laminar flow or at the leading edge of a laminar flow, or in the direction of a crosswind, in order to facilitate the respective increase or decrease in drag. An energy beam may be directed in a rearwards direction, relative to a direction of travel.

Abstract: A haptic effect control system includes: a user interface adapted to receive a user-provided input and transmit a control signal representing the user-provided input; a controller in communication with the user interface and adapted to receive the control signal, analyze the control signal, and generate and transmit a first haptic-audio signal in response to the analysis of the control signal, wherein the first haptic-audio signal represents a first audio output for creating a desired sound pressure deviation from the ambient pressure of the user's environment; and an audio system including a device capable of producing the first audio output having a desired sound pressure level, wherein the audio system is adapted to receive the first haptic-audio signal and transmit the first audio output in response to the first haptic-audio signal.

Abstract: To provide a sounder that outputs alarm sound to notify an abnormality in a monitored region. The sounder includes: a sound source that outputs alarm sound when a pulse signal is applied to the sound source; a pulse signal application unit that applies the pulse signal to the sound source; a storage unit that stores plural combinations of a frequency and a pulse width that the pulse signal can take; and a pulse signal control unit that controls the pulse signal application unit so that the pulse signal corresponding to the combination of the frequency and the pulse width stored in the storage unit is applied to the sound source.

Abstract: At least one exemplary embodiment is directed to a method of auditory communication comprising: measuring a data set; identifying the type of data set; obtaining the auditory cue associated with the type of data set; and generating an auditory notification; and emitting the auditory notification.

Abstract: The invention is aimed at improving valve pinpointing and reading devices by proposing to activate a magnetic detection source allowing measurements regularly-distributed in a circle around an axis at predetermined measurement positions. An exemplary locator comprises a casing (26) provided with a mechanism for detecting and analysing the magnetic field of the magnetic dipole of the valve. It comprises: -a magnetic detection source (36) able to detect and measure the magnetic field of the magnetic centre of the valve at predetermined measurement positions distributed in a circle around an axis (X-X?), linked to -a microprocessor (32) for analysing the measurements and for generating detection signals.

Abstract: A mobile communication apparatus having a reduced user interface is disclosed. The apparatus comprises a touch sensitive input arranged to receive touch actions on a primary surface of the mobile communication apparatus, wherein interpretation of touch actions as input is independent on position of touch on the primary surface while being depending on the way of the touch action, and an output arranged to provide an audio feedback of a user interface status from the interpreted input of the touch actions.

Abstract: A method, system and program product for audio tonal monitoring of web events is provided. The method includes mapping at least one event to be monitored to a plurality of audible data characteristics, logging data pertaining to the one event monitored, and notifying of the event monitored and logged. Further, the method includes checking whether the one event monitored is mapped to a plurality of audible data characteristics, and if yes, verifying a configuration of a sound generator to be used for producing the audible data characteristics. Moreover, the method includes retrieving the audible data characteristics mapped to the event, and producing an audio tone with the audible data characteristics mapped for the event monitored, such that the audio tone produced having the audible data characteristics audibly alerts a site owner of the event monitored.

Abstract: A reflex speaker which provides an acoustic signal generator for acoustic alarm signals is captured in a housing through which the acoustic signals project via ports at the exit end of the housing. The housing defines a compartment at the exit end with an opening which is covered so that the acoustic signals project out of the exit end around the compartment. The cover may be a transparent cover which provides a lens through which optical signals generated by optics in the compartment provided by either LEDs to provide an optical warning signal, or a video camera, such as a CCD, which responds to visual signals as from hazards at the rear of the vehicle.

Abstract: A security system comprising an audible alarm with a microphone within acoustic range of the audible alarm. A storage circuit configured to store at least one acoustic fingerprint. A processing circuit coupled to the storage circuit and configured to create a first acoustic fingerprint from a first signal from the microphone and save the first acoustic fingerprint on the storage circuit. The processing circuit further configured to create a second acoustic fingerprint from a second signal from the microphone and compare the first acoustic fingerprint to the second acoustic fingerprint. The processing circuit further configured to transmit a set of data if the first acoustic fingerprint matches the second acoustic fingerprint. A transmitter coupled to the processing circuit and configured to transmit the set of data. The security system has the advantage to be installed without using wire connections to existing alarm systems or decode their radio frequencies.

Abstract: Handheld charge indicator assemblies, children's ride-on vehicle kits including the same, and methods of determining the state of charge of a battery assembly of a children's ride-on vehicle. Handheld charge indicator assemblies are sized to be held in the hand of a user and are configured to be selectively interconnected to a battery assembly of a children's ride-on vehicle and output an output signal representative of a voltage of the battery assembly. Handheld charge indicator assemblies include a body, an electronic circuit housed within the body, an indicator configured to output an output signal representative of an input voltage to the electronic circuit, and a battery connector configured to engage the battery assembly of a children's ride-on vehicle. In some embodiments, the handheld charge indicator assembly further includes an actuator configured to actuate the electronic circuit to detect the input voltage responsive to a user engaging the actuator.

Abstract: Provided is a door lock device which is installed on a door, to enable people to facilitate to find out location of the door at dark or night and enable the door to be illuminated with a certain brightness so as to be easily viewed at indoor and outdoor sides when indoor and/or outdoor illumination is low, that is, at dark. As a result, the door lock device enables people to easily find out an entrance gate under the fire and other emergency situations. As well, people do not need to find out a particular position or particular article gropingly even in a dark indoor or outdoor. Accordingly, people may not be easily hurt. In addition, since indoor and outdoor places can be illuminated at a certain brightness, the door lock device can indicate that people exist in a warehouse or on a roof of a building even in the case that a warehouse door lock device or a roof entrance door lock device has been automatically locked.

Abstract: A combined and integrated audible and visual signal. A signal case is constructed of a light transmissive material and includes an exposed front end cover with one or more sound transmitting apertures and a tubular wall extending transversely from the exposed end cover for extending through a hole in a mounting panel. A transducer is mounted within the tubular wall and includes a diaphragm that is spaced from the exposed cover. Light sources are mounted to face the diaphragm. The tubular wall in the region between the cover and a plane transverse to the tubular wall through the diaphragm is, in the axial direction, smoothly continuous with no angled bends.

Abstract: A portable device includes a plurality of interface modules and a processing module. The processing module is operably coupled to detect a user input and determine a user interface mode of operation. When the user interface mode of operation is in a first mode, the processing module enables a first one of the plurality of user interface modules to process data corresponding to the user input as the first type of human sensory data and enables a second one of the plurality of user interface modules to process the data corresponding to the user input as the second type of human sensory data.

Abstract: A fire extinguisher accessory device for providing oral instructions for using a fire extinguisher comprising a housing, a digital memory circuit disposed inside the housing, wherein the digital memory circuit can provide oral instructions for using the fire extinguisher such as “pull,” “aim,” “squeeze,” and “sweep”; a speaker disposed on the front surface of the housing; an amplifier disposed inside the housing; and a pressure switch operatively connected to the housing via a lead, wherein when the pressure switch is compressed, the digital memory circuit is activated and provides oral instructions for using the fire extinguisher.

Abstract: A method and device for detecting alert events and responsively playing out audio-clips. The audio-clips may comprise data representing a sound recording. Playing out the audio-clips occurs in an order defined by a sequence. The audio-clips and the sequence are maintained in data storage. A processor executes program logic to detect a first alert event and responsively play out at least a first audio-clip of the sequence, and to detect a next alert event and responsively play out at least a next alert event of the sequence. After playing out all audio-clips in the sequence, play out of the audio-clips may then continue with the first audio-clip of the sequence.

Abstract: A control circuit for a portable x-ray medical imaging system detector. The control circuit operates to reduce power consumption of the portable x-ray detector. The detector control circuit includes a multi-function switch coupled to the portable detector, and a detector control module installed in the portable detector, the detector control module receiving an input from the multi-function switch and based on the received input reconfiguring the portable detector from a first operational mode to a different second operational mode. A portable detector including the detector control circuit and a method of operating the portable detector are also provided.

Abstract: In a method for allowing a patient suffering from a neurological disease and being treated with medication to self-monitor his or her current state, information regarding the motor functions and/or verbal and/or cognitive abilities of the patient are interactively acquired upon using a computer located for easy and repeated access by the patient, and at least one criterion number or a statement describing the state is determined on the basis of this information by an expert system at the computer and is made available to the patient by an output device at the computer.

Abstract: A vehicle presence notification apparatus generates a notice sound by emitting an ultrasonic wave in mid air based on an ultrasonic signal modulated according to an audible sound. During proceeding in mid air, the modulated ultrasonic wave is self-demodulating to become an audible sound. The audible sound posterior to the self-demodulation has a significant directionality like the ultrasonic wave. The notice sound is thus conveyed mainly to a pedestrian who is present in a dangerous area range where a danger needs to be taught. In addition, the vehicle presence notification apparatus includes a sensor-use ultrasonic transducer device having a transducers. The transducer device serves as a vehicle velocity sensor by transmitting an ultrasonic wave towards a road surface based on an ultrasonic wave signal or modulated ultrasonic wave, thereby enabling the vehicle presence notification apparatus to acquire vehicle velocity information by itself.

Abstract: A communication terminal using a flat panel speaker outputs a message of warning, in forms of sound or text shown on display, before outputting sound from the flat panel speaker.

Abstract: A low-profile signal device is provided having a plurality of light emitters disposed on at least one support member, the plurality of light emitters configured to emit light in a plurality of colors that indicate one or more predefined conditions; a housing substantially enclosing the at least one support member; a signal interface coupled to the plurality of light emitters and configured to selectively activate light emitters from the plurality of light emitters in response to a received control signal.

Abstract: This invention realizes an incoming call notification operation for portable equipments in which the amplitude of vibration matches the rhythm of the melody, by electrically connecting an electromagnetic induction actuator that produces melody and vibration to an integrated circuit that outputs the melody generation signal and the vibration signal, and by applying to the electromagnetic induction actuator either the melody generation signal from the integrated circuit or a signal created by mixing the melody generation signal and the vibration generation signal.

Abstract: The invention is an improved audible signaling device with a speaker, a sound chamber, and associated circuitry. The device creates a loud, audible fundamental frequency, and harmonic frequencies that are relatively equal in amplitude to the amplitude of the fundamental frequency.

Abstract: An audio visual turn/hazard signaling system in a vehicle can include an electronic user-selectable sound file, a control circuitry containing a solid state relay, a sensor, and an amplifier. The signal system of the invention provides a customizable signal system including a sound file where the operator can choose the volume and frequency to play when turn signal is activated. The signal system of the invention also provides an automatic volume adjuster wherein the safety of the operator while operating a vehicle is enhanced.

Abstract: An adaptive intelligent electronic horn (100) comprises a mechanical soniferous apparatus (112), an electromagnetic coil (106), a driver circuit (104) and an oscillating circuit (102). A sensor (110) is provided between the mechanical soniferous apparatus (112) and the oscillating circuit (102). An on-off ratio adjusting circuit (108) is provided at the input end of the oscillating circuit (102). The sensor (110) measures the oscillation frequency of the mechanical soniferous apparatus (112) and feedbacks the measured oscillation frequency signal to the oscillating circuit (102). The on-off ratio adjusting circuit (108) controls a pulse width of an oscillation signal from the oscillating circuit (102) based on a voltage of power supply and/or an ambient temperature. The oscillating circuit (102) outputs corresponding oscillation signal to the driver circuit (104) based on the oscillation frequency signal received from the sensor (110) and/or the control signal from the on-off ratio adjusting circuit (108).

Abstract: Text input may be entered on an electronic text input device by a user simultaneously contacting at least two of a plurality of discrete touch sensitive areas on a first surface of the device. A text character for input is determined, based on the touch sensitive areas which are detected as being simultaneously in contact with the user. The determined text character is locked by subsequent user action. A second surface of the device, such as that opposite the first surface, may include a display on which the determined text character and other information may be displayed.

Abstract: A greeting card having an audio message and playback device delivers a first sound recording upon opening of the greeting card and a second sound recording upon closing of the greeting card. The delivery of each sound recording may be delayed by a timing component within the audio message and playback device. Additionally, the delivery of each sound recording may be played simultaneously or in queue. Sound recordings may also be recorded by a user using a recording component that is in addition to the audio message and playback device. The audio message and playback device may also include an additional trial mode component that allows the user to test a recorded message before purchasing the greeting card and place the greeting card into a use mode that allows the user to permanently record the message.

Abstract: A system for providing auditory feedback to visually impaired users when defining visual models. As the visually impaired user creates a visual model, the system detects when an object is placed in such a way that it overlaps with at least one previously placed object. In response to detection of an overlap, the system causes an auditory warning signal to be produced, indicating to the visually impaired user that object is overlapping a previously placed object. The disclosed system operates to create an invisible object within the user interface to cause a warning to be output, or modifies the object whose placement caused the object overlap to include the overlap warning. The user interface focus is then changed or reset to be on the invisible object or the object that caused the overlap to occur, enabling the user to conveniently fix the overlap condition.

Abstract: The present invention is directed to an apparatus for providing law enforcement and private citizens with a single device that integrates law enforcement tools and mechanisms for the application of force. An exemplary device features a metal detector, a light emitting source optionally having a strobe feature, an electric stun system, and a debilitating spray dispensing system. Some embodiments of the present invention include an electric stun system comprising a plurality of probes mounted to the distal terminus of the shaft and configured to protrude from the shaft, a plurality of plates configured longitudinally along the outer surface of the shaft, and a stun system switch disposed on the shaft. Some embodiments of the present invention include the debilitating spray dispensing system comprising at least one nozzle and a dispensing switch disposed on the handle. Some embodiments of the present invention include a handle comprising an ergonomic grip and a guard.

Abstract: A horn powered by a compressed air canister and/or battery pack, that emits sounds that are too high for humans to hear (ultrasonic) and/or too low for humans to hear (infrasonic), to act as a means for repelling animals that can hear these sounds (e.g., mammals, birds, reptiles, or insects), combined with a strobe light powered by the battery pack, that can temporarily blind animals. The canister may contain air or other gases. Ultrasonic and infrasonic sounds may alternate. There can be different sound patterns adapted to different species of animals. It may be hand-held and operated by push button or other means. It can also enable lost persons to send signals to rescuers. It may have a strap for carrying, that can be placed around a user's neck. Alternatively, it may have a clip that can be used to attach the device to a belt, back pack, bicycle, etc.

Abstract: A method, system and program product for audio tonal monitoring of an alarm generated by a device in a network. The method includes mapping a severity level for an alert to be generated for a device in a network to at least one audio tone having a plurality of audible characteristics, generating an alert for the device when an error associated with the device is learned and sending to a monitoring system the alert generated, the alert containing data or information. The method further includes decrypting the alert received and formatting the alert received to add additional information and forwarding the formatted alert to an alert-to-audio cue manager. Further, the method includes mapping the alert forwarded to the audio tone having the plurality of audible characteristics, and playing the audio tone, such that the audio tone played audibly alerts a client of the alert generated by the device.

Abstract: A reusable interdiction apparatus that makes use of a housing of dimensions making the housing suitable to be carried and thrown by an individual. A light source is disposed within the housing and adapted to project an optical signal through a portion of the housing. A controller is used for controlling operation of the light source. A power source is disposed within the housing and used for powering the controller and the light source.

Abstract: The present invention may be used for selectively listening to multiple audio signal sources in a local area. Multiple audio signals from multiple audio signal sources may be combined in a wireless transmitter. The combined audio signals may be converted to an electromagnetic signal for transmission to multiple personal receivers. Each of the audio signal sources may be identified by a unique, visible channel designator. The electromagnetic signal may be received by the personal receivers and reconverted into each of the audio signals. The audio signals may be detected in the personal receivers to identify each to an audio signal source. A user may select a specific audio signal source for a personal receiver and the audio signal may be output to an earphone.