WO2001086828A1 - Reduced radiation audio headset - Google Patents

Reduced radiation audio headset Download PDF

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Publication number
WO2001086828A1
WO2001086828A1 PCT/GB2001/002015 GB0102015W WO0186828A1 WO 2001086828 A1 WO2001086828 A1 WO 2001086828A1 GB 0102015 W GB0102015 W GB 0102015W WO 0186828 A1 WO0186828 A1 WO 0186828A1
Authority
WO
WIPO (PCT)
Prior art keywords
loudspeaker
computer
microphone
headset
mobile telephone
Prior art date
Application number
PCT/GB2001/002015
Other languages
French (fr)
Inventor
Ata-Ul-Habib Khalid
James Luck
Original Assignee
Jk Microtechnology Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jk Microtechnology Limited filed Critical Jk Microtechnology Limited
Priority to AU54949/01A priority Critical patent/AU5494901A/en
Publication of WO2001086828A1 publication Critical patent/WO2001086828A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
    • H04M1/6041—Portable telephones adapted for handsfree use
    • H04M1/6058—Portable telephones adapted for handsfree use involving the use of a headset accessory device connected to the portable telephone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/3827—Portable transceivers
    • H04B1/3833—Hand-held transceivers
    • H04B1/3838—Arrangements for reducing RF exposure to the user, e.g. by changing the shape of the transceiver while in use
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/3827—Portable transceivers
    • H04B1/385—Transceivers carried on the body, e.g. in helmets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
    • H04M1/6041—Portable telephones adapted for handsfree use
    • H04M1/6058—Portable telephones adapted for handsfree use involving the use of a headset accessory device connected to the portable telephone
    • H04M1/6066—Portable telephones adapted for handsfree use involving the use of a headset accessory device connected to the portable telephone including a wireless connection

Definitions

  • This invention relates to an audio headset, which can be used with, for example, mobile telephones, computers, hand-held computers, Personal Digital Assistants (PDAs) and the like.
  • PDAs Personal Digital Assistants
  • FIG. 1 An example of an existing headset, for example as used with a mobile telephone, is shown in Figure 1.
  • Said headset commonly comprises an earpiece 1 and a microphone 2 connected to an existing mobile telephone 15 via an electrical cable 3 and a plug 4.
  • the cable 3 may be clipped to the clothing of the user with the clip 5.
  • the earpiece 1 is placed in the user's ear. It has been shown that such cables act as a conduit for microwave energy, conducting said energy from the mobile telephone directly to the user's head. It has been reported that use of conventional headsets increase the level of microwave radiation incident at the head of the user by a factor of three compared with using the telephone itself adjacent to the ear. (Which April 2000, p.15, Consumer's Association).
  • Standardized personal area network (PAN) technologies such as BluetoothTM utilize 2.45 GHz spread spectrum radio to provide connectivity over distances of typically 1 to 10m.
  • PAN personal area network
  • Such networks are currently used to provide audio to headsets for example in hands-free kits for mobile telephones phones.
  • the use of the 2.45GHz frequency band may give user's cause for concern about the possible harmful effects of said microwave radiation.
  • a mobile telephone as disclosed in patent GB2340691 A is an invention comprising a handset, containing an earpiece and microphone, and another unit containing a transmitter. Said invention enables the transmitter to be located a suitable distance from the user while the telephone is in use and several techniques, which did not involve the use of microwave radiation, were described for exchanging speech and control signals between the two units. This resulted in the microwave radiation incident upon the user's head being reduced compared to a mobile telephone operated adjacent to the user's ear or a mobile telephone operated with a conventional (electrically connected) headset.
  • the first object of the present invention is to provide an apparatus that is in essence a headset for use with mobile telephones, computers, hand-held computers, Personal Digital Assistants (PDAs) or the like in which the loudspeaker and the microphone are contained within an enclosure and the communications link between the loudspeaker of said headset and the ea ⁇ iece of said headset is an acoustic conduit, for example a silicon rubber tube.
  • PDAs Personal Digital Assistants
  • the second object of the present invention is to provide a headset for use with a mobile telephone, computer, hand-held computer, Personal Digital Assistant or the like whereby the microwave radiation generated by the said mobile telephone, computer, hand-held computer, Personal Digital Assistant or the like and incident at the user's head is reduced significantly compared to a headset whereby the communication channel between the ea ⁇ iece of the headset and the said mobile telephone, computer, hand-held computer, Personal Digital Assistant or the like is entirely an electrical wire or wires.
  • an apparatus in the form of a headset for use with a mobile telephone, computer, hand-held computer, Personal Digital Assistant or the like, in which the loudspeaker and the microphone are contained within an enclosure and the communications link between the ea ⁇ iece of said headset and the mobile telephone, computer, hand-held computer, Personal Digital Assistant or the like is an acoustic conduit, for example a silicon rubber tube.
  • an apparatus in the form of a headset for use with a mobile telephone, computer, hand-held computer, Personal Digital Assistant or the like which can perform its function with the terminal or terminals of any or all electrical wire or wires connected to the mobile telephone, computer, hand-held computer, Personal Digital Assistant or the like separated from the user's head by a distance typically in excess of, though it may be less than, 30cm.
  • an apparatus in the form of a headset for use with a mobile telephone, computer, hand-held computer, Personal Digital Assistant or the like in which the communications link between the said mobile telephone, computer, hand-held computer, Personal Digital Assistant or the like and the speaker and microphone of the headset is in the form of, for example but not limited to, an electrical wire or wires, an infra-red link, a radio link, a BluetoothTM radio link, an inductive-loop link, a fibre-optic link or an ultrasonic link.
  • Figure 1 is a perspective view of an existing example of a headset.
  • Figure 2 is a schematic diagram of the first embodiment of the present invention.
  • Figure 3 shows the enclosure containing the microphone and loudspeaker and the clip detail.
  • Figure 4 is a schematic diagram of the second embodiment of the present invention.
  • Figure 5 is a schematic diagram of the third embodiment of the present invention with a cut away to show enclosed microphone and loudspeaker.
  • Figure 6 is a schematic diagram of the fourth embodiment of the present invention with a cut away to show enclosed microphone and loudspeaker and tube section detail.
  • Enclosure 6 contains loudspeaker 8 electrically connected to electrical cable 12 via electrical wires 16 and 17 and microphone 7 electrically connected to electrical cable 12 via electrical wires 18 and 19.
  • Loudspeaker 8 is mechanically connected to tube 9 via hollow cone 14 and thence to silicon-rubber or the like tube 10.
  • Tube 10 terminates at ea ⁇ iece 11, a hollow construction of moulded plastic or the like.
  • the arrangement of components 8, 14, 9,10 and 11 is such that any sound generated by loudspeaker 8 will be conducted to the aperture in the ea ⁇ iece 11 via components 14, 9 and 10.
  • Enclosure 6 may be attached to the clothing of the user by removable clip 20 (not shown on Figure 2) or alternatively suspended from ea ⁇ iece 11 by the acoustic conduit, for example silicon-rubber tube, 10.
  • Enclosure 6 contains microphone 7, electrically connected to transmit/receive unit 25, for example utilizing the BluetoothTM protocol, via electrical wires 18 and 19.
  • Loudspeaker 8 is mechanically connected to pipe 9 via hollow cone 14 and thence to silicon-rubber or the like tube 10. Tube 10 terminates at ea ⁇ iece 11, a hollow construction of moulded plastic or the like.
  • the arrangement of components 8, 14, 9,10 and 11 is such that any sound generated by loudspeaker 8 will be conducted to the aperture in the ea ⁇ iece 11 via components 14, 9 and 10.
  • the user's voice is collected by microphone 7 and conveyed as an electrical signal to transmit/receive unit 25, for example utilizing the Bluetooth protocol, via electrical wires 18 and 19.
  • the transmit/receive unit 25 communicates with the mobile telephone 15 via transmit/receive unit 24, for example utilizing the Bluetooth protocol attached to the electrical connector on the telephone 15.
  • the combined transmit/receive unit 25, for example utilizing the BluetoothTM protocol coverts the electrical analogue of the received sound present on wires 18 and 19 into a suitably modulated signal. Said signal is transmitted over path 26 and received by a suitable receiver circuit in transmit/receive unit 24, for example utilizing the Bluetooth protocol and converted into an electrical analogue of the audio signal suitable for reception by the telephone 15.
  • the demodulated audio signal received by the telephone 15 is fed to transmit/receive unit 24, for example utilizing the Bluetooth protocol, converted into a suitably modulated signal and transmitted from transmit/receive unit 24, for example utilizing the Bluetooth protocol.
  • Said signal is received by transmit/receive unit 25, for example utilizing the Bluetooth protocol and converted into an electrical analogue of the audio signal and fed to loudspeaker 8 via wires 16 & 17.
  • Enclosure 6 may be attached to the clothing of the user by removable clip 20 (not shown on Figure 4).
  • Enclosure 6 contains loudspeaker 8 and microphone 7. Enclosure 6 is located with the mobile phone 15. Loudspeaker 8 is mechanically connected to pipe 9 via hollow cone 14 and then to silicon-rubber or the like tube 10. Tube 10 terminates at ea ⁇ iece 11, a hollow construction of moulded plastic or the like. The arrangement of components 8, 14, 9,10 and 11 is such that any sound generated by loudspeaker 8 will be conducted to the aperture in the ea ⁇ iece 11 via components 14, 9 and 10. The user's voice is collected by microphone 7 via aperture 27 in the body of mobile phone 15.
  • Enclosure 6 contains loudspeaker 8 and microphone 7. Enclosure 6 is located with the mobile phone 15. Loudspeaker 8 is mechanically connected to pipe 9 via hollow cone 14 and then to silicon-rubber or the like tube 10. Tube 10 terminates at ea ⁇ iece 11, a hollow construction of moulded plastic or the like. The arrangement of components 8, 14, 9,10 and 11 is such that any sound generated by loudspeaker 8 will be conducted to the aperture in the ea ⁇ iece 11 via components 14, 9 and 10. Microphone 7 is mechanically connected to pipe 29 via hollow cone 28 and then to silicon-rubber or the like tube 30.
  • the termination of the tube 30 is such that it is approximately 30cms from the ea ⁇ iece 11.
  • the open aperture 31 of tube 30 collects the user's voice and conveys it via components 30,29 and 28 to microphone 7.
  • Pipes 9 and 29 can be removed cones 14 and 28 respectively, allowing the tubes to be disconnected when the headset is not required and thereby allowing the mobile phone 15 to function as a conventional phone without the headset.
  • BluetoothTM is a trademark of ArdiebolagetLM Ericsson Sweden.

Abstract

An apparatus in the form of an audio headset for use with, for example mobile telephones, computers, hand-held computers, Personal Digital Assistants (PDAs) or the like in which the loudspeaker and the microphone are contained within an enclosure and the communications link between the loudspeaker of said headset and the earpiece of said headset is a non-metallic acoustic conduit, for example a silicon rubber tube. By forming the communications link from a non-metallic material which cannot act as a conduit for microwave radiation the microwave radiation generated by the said telephone and incident at the user's head is significantly reduced compared to an audio head-set whereby the communication link to the said earpiece is made from electrical wires.

Description

Reduced Radiation Audio Headset
This invention relates to an audio headset, which can be used with, for example, mobile telephones, computers, hand-held computers, Personal Digital Assistants (PDAs) and the like.
An example of an existing headset, for example as used with a mobile telephone, is shown in Figure 1. Said headset commonly comprises an earpiece 1 and a microphone 2 connected to an existing mobile telephone 15 via an electrical cable 3 and a plug 4. The cable 3 may be clipped to the clothing of the user with the clip 5. In normal use the earpiece 1 is placed in the user's ear. It has been shown that such cables act as a conduit for microwave energy, conducting said energy from the mobile telephone directly to the user's head. It has been reported that use of conventional headsets increase the level of microwave radiation incident at the head of the user by a factor of three compared with using the telephone itself adjacent to the ear. (Which April 2000, p.15, Consumer's Association). The effects upon the user of microwave radiation at the levels commonly found to be emitted from mobile telephones are not fully understood, but there is evidence to suggest a link between said radiation and ill effects in the users of mobile telephones. It is evident that mobile telephone users are concerned about the possible harmful effects of said microwave radiation and a device that reduced the incidence of said microwave radiation upon the user's head would be welcomed.
The clock frequencies of computers intended for personal use are increasing annually with clock frequencies of 1.2GHz (1 GHz = 1 x 109 Hertz) currently available. It is considered to be only a matter of time before the clock frequencies of such apparatus reach that of mobile telephones (e.g. 1.8GHz) or that of microwave ovens (2.45GHz) at such a time the hazards that are currently suspected of being associated with mobile telephones may also become suspected of being associated with said computers.
Standardized personal area network (PAN) technologies such as Bluetooth™ utilize 2.45 GHz spread spectrum radio to provide connectivity over distances of typically 1 to 10m. Such networks are currently used to provide audio to headsets for example in hands-free kits for mobile telephones phones. The use of the 2.45GHz frequency band may give user's cause for concern about the possible harmful effects of said microwave radiation.
A mobile telephone as disclosed in patent GB2340691 A is an invention comprising a handset, containing an earpiece and microphone, and another unit containing a transmitter. Said invention enables the transmitter to be located a suitable distance from the user while the telephone is in use and several techniques, which did not involve the use of microwave radiation, were described for exchanging speech and control signals between the two units. This resulted in the microwave radiation incident upon the user's head being reduced compared to a mobile telephone operated adjacent to the user's ear or a mobile telephone operated with a conventional (electrically connected) headset. A major deficiency of the invention described in patent GB2340691 A is that the eaφiece and microphone were incoφorated into a handset and as such required the use of the user's hand to operate the telephone. Such a requirement impedes the use of the telephone in a moving vehicle or in any other situation where the user would preferentially have both hands free of the telephone.
The first object of the present invention is to provide an apparatus that is in essence a headset for use with mobile telephones, computers, hand-held computers, Personal Digital Assistants (PDAs) or the like in which the loudspeaker and the microphone are contained within an enclosure and the communications link between the loudspeaker of said headset and the eaφiece of said headset is an acoustic conduit, for example a silicon rubber tube.
The second object of the present invention is to provide a headset for use with a mobile telephone, computer, hand-held computer, Personal Digital Assistant or the like whereby the microwave radiation generated by the said mobile telephone, computer, hand-held computer, Personal Digital Assistant or the like and incident at the user's head is reduced significantly compared to a headset whereby the communication channel between the eaφiece of the headset and the said mobile telephone, computer, hand-held computer, Personal Digital Assistant or the like is entirely an electrical wire or wires.
According to the first aspect of the present invention there is provided an apparatus in the form of a headset for use with a mobile telephone, computer, hand-held computer, Personal Digital Assistant or the like, in which the loudspeaker and the microphone are contained within an enclosure and the communications link between the eaφiece of said headset and the mobile telephone, computer, hand-held computer, Personal Digital Assistant or the like is an acoustic conduit, for example a silicon rubber tube.
According to the second aspect of the present invention there is provided an apparatus in the form of a headset for use with a mobile telephone, computer, hand-held computer, Personal Digital Assistant or the like, which can perform its function with the terminal or terminals of any or all electrical wire or wires connected to the mobile telephone, computer, hand-held computer, Personal Digital Assistant or the like separated from the user's head by a distance typically in excess of, though it may be less than, 30cm.
According to the third aspect of the present invention there is provided an apparatus in the form of a headset for use with a mobile telephone, computer, hand-held computer, Personal Digital Assistant or the like in which the communications link between the said mobile telephone, computer, hand-held computer, Personal Digital Assistant or the like and the speaker and microphone of the headset is in the form of, for example but not limited to, an electrical wire or wires, an infra-red link, a radio link, a Bluetooth™ radio link, an inductive-loop link, a fibre-optic link or an ultrasonic link.
Figure 1 is a perspective view of an existing example of a headset. Figure 2 is a schematic diagram of the first embodiment of the present invention.
Figure 3 shows the enclosure containing the microphone and loudspeaker and the clip detail.
Figure 4 is a schematic diagram of the second embodiment of the present invention.
Figure 5 is a schematic diagram of the third embodiment of the present invention with a cut away to show enclosed microphone and loudspeaker.
Figure 6 is a schematic diagram of the fourth embodiment of the present invention with a cut away to show enclosed microphone and loudspeaker and tube section detail.
The first preferred embodiment of the present invention will be described by way of a non-restrictive example with reference to Figures 2 and 3. Enclosure 6 contains loudspeaker 8 electrically connected to electrical cable 12 via electrical wires 16 and 17 and microphone 7 electrically connected to electrical cable 12 via electrical wires 18 and 19. Loudspeaker 8 is mechanically connected to tube 9 via hollow cone 14 and thence to silicon-rubber or the like tube 10. Tube 10 terminates at eaφiece 11, a hollow construction of moulded plastic or the like. The arrangement of components 8, 14, 9,10 and 11 is such that any sound generated by loudspeaker 8 will be conducted to the aperture in the eaφiece 11 via components 14, 9 and 10. The user's voice is collected by microphone 7 and conveyed as an electrical signal to the mobile telephone via electrical wires 18 and 19 and electrical cable 12. Electrical cable 12 is connected to existing mobile telephone 15 via connector 13. Enclosure 6 may be attached to the clothing of the user by removable clip 20 (not shown on Figure 2) or alternatively suspended from eaφiece 11 by the acoustic conduit, for example silicon-rubber tube, 10.
The second preferred embodiment of the present invention will be described by way of a non-restrictive example with reference to Figure 4. Enclosure 6 contains microphone 7, electrically connected to transmit/receive unit 25, for example utilizing the Bluetooth™ protocol, via electrical wires 18 and 19. Loudspeaker 8 is mechanically connected to pipe 9 via hollow cone 14 and thence to silicon-rubber or the like tube 10. Tube 10 terminates at eaφiece 11, a hollow construction of moulded plastic or the like. The arrangement of components 8, 14, 9,10 and 11 is such that any sound generated by loudspeaker 8 will be conducted to the aperture in the eaφiece 11 via components 14, 9 and 10. The user's voice is collected by microphone 7 and conveyed as an electrical signal to transmit/receive unit 25, for example utilizing the Bluetooth protocol, via electrical wires 18 and 19.
The transmit/receive unit 25, for example utilizing the Bluetooth™ protocol, communicates with the mobile telephone 15 via transmit/receive unit 24, for example utilizing the Bluetooth protocol attached to the electrical connector on the telephone 15. The combined transmit/receive unit 25, for example utilizing the Bluetooth™ protocol coverts the electrical analogue of the received sound present on wires 18 and 19 into a suitably modulated signal. Said signal is transmitted over path 26 and received by a suitable receiver circuit in transmit/receive unit 24, for example utilizing the Bluetooth protocol and converted into an electrical analogue of the audio signal suitable for reception by the telephone 15. The demodulated audio signal received by the telephone 15 is fed to transmit/receive unit 24, for example utilizing the Bluetooth protocol, converted into a suitably modulated signal and transmitted from transmit/receive unit 24, for example utilizing the Bluetooth protocol. Said signal is received by transmit/receive unit 25, for example utilizing the Bluetooth protocol and converted into an electrical analogue of the audio signal and fed to loudspeaker 8 via wires 16 & 17. Enclosure 6 may be attached to the clothing of the user by removable clip 20 (not shown on Figure 4).
The third preferred embodiment of the present invention will be described by way of a non-restrictive example with reference to Figure 5. Enclosure 6 contains loudspeaker 8 and microphone 7. Enclosure 6 is located with the mobile phone 15. Loudspeaker 8 is mechanically connected to pipe 9 via hollow cone 14 and then to silicon-rubber or the like tube 10. Tube 10 terminates at eaφiece 11, a hollow construction of moulded plastic or the like. The arrangement of components 8, 14, 9,10 and 11 is such that any sound generated by loudspeaker 8 will be conducted to the aperture in the eaφiece 11 via components 14, 9 and 10. The user's voice is collected by microphone 7 via aperture 27 in the body of mobile phone 15.
The fourth preferred embodiment of the present invention will be described by way of a non-restrictive example with reference to Figure 6. Enclosure 6 contains loudspeaker 8 and microphone 7. Enclosure 6 is located with the mobile phone 15. Loudspeaker 8 is mechanically connected to pipe 9 via hollow cone 14 and then to silicon-rubber or the like tube 10. Tube 10 terminates at eaφiece 11, a hollow construction of moulded plastic or the like. The arrangement of components 8, 14, 9,10 and 11 is such that any sound generated by loudspeaker 8 will be conducted to the aperture in the eaφiece 11 via components 14, 9 and 10. Microphone 7 is mechanically connected to pipe 29 via hollow cone 28 and then to silicon-rubber or the like tube 30. The termination of the tube 30 is such that it is approximately 30cms from the eaφiece 11. The open aperture 31 of tube 30 collects the user's voice and conveys it via components 30,29 and 28 to microphone 7. Pipes 9 and 29 can be removed cones 14 and 28 respectively, allowing the tubes to be disconnected when the headset is not required and thereby allowing the mobile phone 15 to function as a conventional phone without the headset.
Obviously, many modifications and variations of the present invention are possible now that the present invention has been disclosed. Therefore, it is to be understood that within the scope of the appended claims the invention may be practiced otherwise than as specifically described above.
Bluetooth™ is a trademark of TelefonaktiebolagetLM Ericsson Sweden.

Claims

Claims
1. An apparatus in the form of a headset for use with a mobile telephone, computer, hand-held computer, Personal Digital Assistant (PDA) or the like in which the loudspeaker and the microphone are contained within an enclosure and the communications link between the loudspeaker of said headset and the eaφiece of said headset is an acoustic conduit, for example a silicon rubber tube.
2. An apparatus according to Claim 1 , which can perform its function with the terminal or terminals of any or all electrical wire or wires that form part of the headset are separated from the user's head by a distance typically in excess of, though it may be less than, 30cm.
3. An apparatus according to Claim 1 whereby the sound generated by the loudspeaker is coupled into the acoustic pipe by a hollow cone.
4. An apparatus according to Claims 1,2 and 3 in which the communications link between the user and the mobile telephone, computer, hand-held computer, Personal Digital Assistant (PDA) or the like comprises in part a loudspeaker contained within an enclosure and connected to the mobile telephone, computer, hand-held computer, Personal Digital Assistant (PDA) or the like via an electrical cable comprising at least one electrical wire.
5. An apparatus according to Claims 1,2 and 3 in which the communications link between the user and the mobile telephone, computer, hand-held computer, Personal Digital Assistant (PDA) or the like comprises in part a microphone contained within an enclosure and connected to the mobile telephone, computer, hand-held computer, Personal Digital Assistant (PDA) or the like via an electrical cable comprising at least one electrical wire.
6. An apparatus according to Claims 1,2 and 3 in which the communications link between the loudspeaker and microphone of the headset, contained within their enclosure, and the mobile telephone, computer, hand-held computer, Personal Digital Assistant (PDA) or the like is a radio link.
7. An apparatus according to Claims 1 ,2 and 3 in which the communications link between the loudspeaker and microphone of the headset, contained within their enclosure, and the mobile telephone, computer, hand-held computer, Personal Digital Assistant (PDA) or the like is an infra-red link.
8. An apparatus according to Claims 1 ,2 and 3 in which the communications link between the loudspeaker and microphone of the headset, contained within their enclosure, and the mobile telephone, computer, hand-held computer, Personal Digital Assistant (PDA) or the like is a radio link employing the Bluetooth™ protocol.
9. An apparatus according to Claims 1 ,2 and 3 in which the communications link between the loudspeaker and microphone of the headset contained within their enclosure and the mobile telephone, computer, hand-held computer, Personal Digital Assistant (PDA) or the like is an inductive-loop link.
10. An apparatus according to Claims 1,2 and 3 in which the communications link between the loudspeaker and microphone of the headset contained within their enclosure and the mobile telephone, computer, hand-held computer, Personal Digital Assistant (PDA) or the like is an ultrasonic link.
11. An apparatus according to Claims 1 , 2 and 3 in which the enclosure containing the loudspeaker and microphone can be attached to the clothing of the user by a clip or suspended from the ear of the user by the acoustic conduit.
12. An apparatus according to Claims 1 , 2 and 3 in which the enclosure containing the loudspeaker and microphone is itself contained within the mobile telephone, computer, hand-held computer, Personal Digital Assistant (PDA) or the like and the acoustic conduit used to convey sound from the loudspeaker to the eaφiece is attached to the cone via a suitable plug and socket.
13. An apparatus according to Claims 1 , 2 and 3 in which the enclosure containing the loudspeaker and microphone is itself contained within the mobile telephone, computer, hand-held computer, Personal Digital Assistant (PDA) or the like and the acoustic conduit used to convey sound from the loudspeaker to the eaφiece is attached to the cone channeling sound from the loudspeaker via a suitable plug and socket and the acoustic conduit used to convey to user's voice to the cone channeling sound to the microphone is attached to said cone via a suitable plug and socket.
14. Apparatus substantially as described herein with reference to Figures 2,3,4,5 and
PCT/GB2001/002015 2000-05-10 2001-05-09 Reduced radiation audio headset WO2001086828A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU54949/01A AU5494901A (en) 2000-05-10 2001-05-09 Reduced radiation audio headset

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0011139A GB0011139D0 (en) 2000-05-10 2000-05-10 Reduced radiation hands-free attachment for mobile telephones
GB0011139.3 2000-05-10

Publications (1)

Publication Number Publication Date
WO2001086828A1 true WO2001086828A1 (en) 2001-11-15

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GB (2) GB0011139D0 (en)
WO (1) WO2001086828A1 (en)

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GB0110824D0 (en) 2001-06-27
GB2367203A (en) 2002-03-27
GB0011139D0 (en) 2000-06-28
AU5494901A (en) 2001-11-20

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