Abstract: Radio location finding A method of detecting a radio emission source (2) includes receiving three or more radio signal datasets from three or more respective sensors (3). Each sensor (3) corresponds to a physical location and includes at least one radio receiver (4). The three or more radio signal datasets include one or more directional datasets obtained using a directional antenna (9, 23) or a directional antenna array of the corresponding sensor, and two or more omnidirectional datasets, each obtained using an omnidirectional antenna (9, 22) or an omnidirectional antenna array of the corresponding sensor. The method also includes determining whether an emitter signal (8) within a target frequency range is present in any of the one or more directional datasets.

Abstract: A method (1) for passively locating a radio emission source (2a, 2b) is described. The method includes including receiving radio signal datasets (D) corresponding to each of three of more sensors (3). Each sensor (3) includes at least one radio receiver (4). The method also includes receiving or retrieving a physical location corresponding to each sensor (3). The physical locations define a convex hull (5). The method also includes determining whether an emitter signal (8) within a target frequency range is present in any of the radio signal datasets (D), and assigning any radio signal dataset which comprises the emitter signal as a detection dataset. The method also includes, in response to determining three or more detection datasets, calculating a signal location (r) based on arrival times of the emitter signal and the respective physical locations. The method also includes generating a locus of possible positions based on calculating two or more alternative signal locations.

Abstract: A system and method is disclosed for identification of a musical note played by a musical wind instrument with a resonant chamber having a plurality of configurations selectable by a player of the musical wind instrument and an electrically conductive surface in the resonant chamber. The system and method include a stimulation signal generator for generating a stimulation signal and antenna means mountable on the musical instrument for broadcasting the stimulation signal as an electromagnetic signal within the resonant chamber and for receiving a reflected electromagnetic signal from the resonant chamber The system and method also include an electronic processing unit for processing the reflected electromagnetic signal and determining therefrom a configuration of the resonant chamber selected by the player and indicative of a musical note that is or would be output by the instrument when played at the time of the received reflected signal.

Abstract: This disclosure provides a transducer apparatus for an edge-blown aerophone, the edge-blown aerophone having an aerophone embouchure hole. An aerophone speaker delivers sound to a resonant chamber of the aerophone via the aerophone embouchure hole. An aerophone microphone receives, via the aerophone embouchure hole, sound in the resonant chamber. A housing provides a lip plate with a housing embouchure hole independent and separate from the aerophone embouchure hole. Breath sensors sense breath applied across the housing embouchure hole. An electronic processor, connected to the speaker, receives signals from the microphone and the breath sensors. The breath sensors provide signals indicative of breath strength. The electronic processor generates an excitation signal which is delivered as an acoustic excitation signal to the resonant chamber by the aerophone speaker. The electronic processor uses the signals it receives to determine a desired musical note which a player of the aerophone wishes to play.

Abstract: This disclosure provides a transducer apparatus for an edge-blown aerophone, the edge-blown aerophone having an aerophone embouchure hole. An aerophone speaker delivers sound to a resonant chamber of the aerophone via the aerophone embouchure hole. An aerophone microphone receives, via the aerophone embouchure hole, sound in the resonant chamber. A housing provides a lip plate with a housing embouchure hole independent and separate from the aerophone embouchure hole. Breath sensors sense breath applied across the housing embouchure hole. An electronic processor, connected to the speaker, receives signals from the microphone and the breath sensors. The breath sensors provide signals indicative of breath strength. The electronic processor generates an excitation signal which is delivered as an acoustic excitation signal to the resonant chamber by the aerophone speaker. The electronic processor uses the signals it receives to determine a desired musical note which a player of the aerophone wishes to play.

Abstract: A transducer apparatus for a labrosone is disclosed, the labrosone having a labrosone resonant chamber. A labrosone speaker delivers a sound signal to the labrosone resonant chamber. A labrosone microphone receives a resultant sound from the labrosone resonant chamber. A mouthpiece microphone receives sound from a labrosone mouthpiece. An electronic processor is connected to the labrosone speaker, and receives signals from the labrosone microphone and the mouthpiece microphone. The electronic processor generates an excitation signal which is delivered as an acoustic excitation signal to the labrosone resonant chamber by the labrosone speaker. The electronic processor uses the signals from the labrosone microphone and the mouthpiece microphone to determine a desired musical note which a player of the labrosone wishes to play. The electronic processor then synthesizes and outputs the desired musical note to an output device, whereby the musical note is played audibly and/or displayed visually to the player.

Abstract: With reference to FIG. 7a the present invention relates to transducer apparatus (200) for use with a reed instrument (201) having an air chamber (15) forming a resonant cavity whose resonance characteristics are controlled by opening and closing of tone holes (17A, 17B) connecting the air chamber to the exterior of the reed instrument. The transducer apparatus comprises attachment means (202) for releasably securing the transducer apparatus to a mouthpiece (201) of the reed instrument in place of a reed. A reed replacement section (203) has a housing with an abutment surface for abutting a surface part of the mouthpiece which would be abutted by a reed secured to the mouthpiece. An air passage extends through the housing of the reed replacement section (203) from an air inlet (211) through which a player of the instrument can blow to an air outlet (213) through which air blown by the player is delivered to atmosphere, without passing through the air chamber (15) within the reed instrument.

Abstract: With reference to FIG. 7a the present invention relates to transducer apparatus (200) for use with a reed instrument (201) having an air chamber (15) forming a resonant cavity whose resonance characteristics are controlled by opening and closing of tone holes (17A, 17B) connecting the air chamber to the exterior of the reed instrument. The transducer apparatus comprises attachment means (202) for releasably securing the transducer apparatus to a mouthpiece (201) of the reed instrument in place of a reed. A reed replacement section (203) has a housing with an abutment surface for abutting a surface part of the mouthpiece which would be abutted by a reed secured to the mouthpiece. An air passage extends through the housing of the reed replacement section (203) from an air inlet (211) through which a player of the instrument can blow to an air outlet (213) through which air blown by the player is delivered to atmosphere, without passing through the air chamber (15) within the reed instrument.

Abstract: A transducer apparatus for a labrosone is disclosed, the labrosone having a labrosone resonant chamber. A labrosone speaker delivers a sound signal to the labrosone resonant chamber. A labrosone microphone receives a resultant sound from the labrosone resonant chamber. A mouthpiece microphone receives sound from a labrosone mouthpiece. An electronic processor is connected to the labrosone speaker, and receives signals from the labrosone microphone and the mouthpiece microphone. The electronic processor generates an excitation signal which is delivered as an acoustic excitation signal to the labrosone resonant chamber by the labrosone speaker. The electronic processor uses the signals from the labrosone microphone and the mouthpiece microphone to determine a desired musical note which a player of the labrosone wishes to play. The electronic processor then synthesizes and outputs the desired musical note to an output device, whereby the musical note is played audibly and/or displayed visually to the player.

Abstract: With reference to FIG. 7a the present invention relates to transducer apparatus (200) for use with a reed instrument (201) having an air chamber (15) forming a resonant cavity whose resonance characteristics are controlled by opening and closing of tone holes (17A, 17B) connecting the air chamber to the exterior of the reed instrument. The transducer apparatus comprises attachment means (202) for releasably securing the transducer apparatus to a mouthpiece (201) of the reed instrument in place of a reed. A reed replacement section (203) has a housing with an abutment surface for abutting a surface part of the mouthpiece which would be abutted by a reed secured to the mouthpiece. An air passage extends through the housing of the reed replacement section (203) from an air inlet (211) through which a player of the instrument can blow to an air outlet (213) through which air blown by the player is delivered to atmosphere, without passing through the air chamber (15) within the reed instrument.

Abstract: With reference to FIG. 7a the present invention relates to transducer apparatus (200) for use with a reed instrument (201) having an air chamber (15) forming a resonant cavity whose resonance characteristics are controlled by opening and closing of tone holes (17A, 17B) connecting the air chamber to the exterior of the reed instrument. The transducer apparatus comprises attachment means (202) for releasably securing the transducer apparatus to a mouthpiece (201) of the reed instrument in place of a reed. A reed replacement section (203) has a housing with an abutment surface for abutting a surface part of the mouthpiece which would be abutted by a reed secured to the mouthpiece. An air passage extends through the housing of the reed replacement section (203) from an air inlet (211) through which a player of the instrument can blow to an air outlet (213) through which air blown by the player is delivered to atmosphere, without passing through the air chamber (15) within the reed instrument.

Abstract: With reference to FIG. 7a the present invention relates to transducer apparatus (200) for use with a reed instrument (201) having an air chamber (15) forming a resonant cavity whose resonance characteristics are controlled by opening and closing of tone holes (17A, 17B) connecting the air chamber to the exterior of the reed instrument. The transducer apparatus comprises attachment means (202) for releasably securing the transducer apparatus to a mouthpiece (201) of the reed instrument in place of a reed. A reed replacement section (203) has a housing with an abutment surface for abutting a surface part of the mouthpiece which would be abutted by a reed secured to the mouthpiece. An air passage extends through the housing of the reed replacement section (203) from an air inlet (211) through which a player of the instrument can blow to an air outlet (213) through which air blown by the player is delivered to atmosphere, without passing through the air chamber (15) within the reed instrument.

Abstract: With reference to FIG. 7a the present invention relates to transducer apparatus (200) for use with a reed instrument (201) having an air chamber (15) forming a resonant cavity whose resonance characteristics are controlled by opening and closing of tone holes (17A, 17B) connecting the air chamber to the exterior of the reed instrument. The transducer apparatus comprises attachment means (202) for releasably securing the transducer apparatus to a mouthpiece (201) of the reed instrument in place of a reed. A reed replacement section (203) has a housing with an abutment surface for abutting a surface part of the mouthpiece which would be abutted by a reed secured to the mouthpiece. An air passage extends through the housing of the reed replacement section (203) from an air inlet (211) through which a player of the instrument can blow to an air outlet (213) through which air blown by the player is delivered to atmosphere, without passing through the air chamber (15) within the reed instrument.

Abstract: A particle matter agglomeration system (100) enables cost effective and efficient filtration of aerosols. The system (100) includes an acoustic chamber (110) for receiving an aerosol, and an ultrasonic transducer head assembly (300) for supporting an ultrasonic transducer (400). A transducer plate (410) faces into the acoustic chamber (110) for applying ultrasonic energy to the aerosol inside the acoustic chamber (110). A shaft (405) extends through the head assembly (300) and connects the transducer plate (410) to the ultrasonic transducer (400). A cooling jacket (315) is positioned around the shaft (405) and between the transducer plate (410) and the ultrasonic transducer (400), wherein the cooling jacket (315) receives cooling fluid for cooling the ultrasonic transducer (400).

Abstract: A telecommunications system includes a first (home) mobile telecommunications network A5 second (roamed) mobile telecommunications network B and a third (virtual) mobile telecommunications network C. The virtual network C does not have its own radio access network but uses the radio access network of network B in accordance with a commercial contract between networks B and C. Network C is a MVNO. When a mobile telecommunications device that has network A as its home network roams to network B, the mobile telecommunications device initially registers with network B as the roamed network. Conventionally, communications between network A and network B would be transmitted via a fixed communication link (25) (such as a leased line). However, in the embodiment described, the network A transmits a command to the mobile telecommunications device, instructing that device to de-register from network B and to re-register with virtual network C.

Abstract: A telecommunications system includes a first (home) mobile telecommunications network A5 second (roamed) mobile telecommunications network B and a third (virtual) mobile telecommunications network C. The virtual network C does not have its own radio access network but uses the radio access network of network B in accordance with a commercial contract between networks B and C. Network C is a MVNO. When a mobile telecommunications device that has network A as its home network roams to network B, the mobile telecommunications device initially registers with network B as the roamed network. Conventionally, communications between network A and network B would be transmitted via a fixed communication link (25) (such as a leased line). However, in the embodiment described, the network A transmits a command to the mobile telecommunications device, instructing that device to de-register from network B and to re-register with virtual network C.

Abstract: A device or “dongle” (32) is provided for coupling to a Windows-based PC (23). The dongle (32) includes a subscriber identity module (SIM) (15), such as the type used in GSM or UMTS cellular or mobile telecommunications networks. A search engine (40) is accessed by the PC (23) by means of a client application (38) on the PC. The search engine (40) generates a list of search results in response to search criteria in a known manner. Further, the search engine is able to return search results relating to data for which there is restricted access (for example, encrypted data). Such data is identified with a tag which may, for example indicated which users or entities are able to access that data. A user's dongle (32) authenticates that user with the network (3) using a authentication arrangement similar to that employed for authenticating users of a GSM or UMTS mobile telecommunications network. The authenticated identity of the user is communicated to the search engine.

Abstract: A spectacle kit includes a pair of lenses made from flexible material joined by a nose bridge portion and a pair of side arms. Each lens has an outer upper portion and an outer lower portion which move towards one another to overlap and form a convex portion in each lens.