WO2003026342A2 - A headphone - Google Patents
A headphone Download PDFInfo
- Publication number
- WO2003026342A2 WO2003026342A2 PCT/EP2002/010612 EP0210612W WO03026342A2 WO 2003026342 A2 WO2003026342 A2 WO 2003026342A2 EP 0210612 W EP0210612 W EP 0210612W WO 03026342 A2 WO03026342 A2 WO 03026342A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- audio
- jack
- receiver
- unit
- connector
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1033—Cables or cables storage, e.g. cable reels
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R5/00—Stereophonic arrangements
- H04R5/033—Headphones for stereophonic communication
Definitions
- the invention relates to a headphone having a lead that functions not only to supply audio signals to the headphone earpieces, but also as an antenna for receiving radio frequency (RF) signals for a receiver.
- RF radio frequency
- a headphone having at least two wires, at least one of which is an audio wire, said at least one audio wire being connected to a jack for input into a receiver/audio unit, and said wires also being connected to a common ground line, said ground line extends from the jack such that it is connected to the casing of said receiver audio unit when the jack is connected thereto so as to extend the length of the audio wire.
- the signal field strength is so high, and the anticipated performance minimal enough, that the antenna efficiency is not critical.
- the headphone arrangement of the antenna typically comprises two ear phones each having similar configuration of audio wires, so as to provide stereo sound.
- a preferred embodiment comprises two headphones each connected to at least two wires, at least one of which is an audio wire; each of said audio wires being connected to a jack for input into a receiver/audio unit and at least another of said wires is connected to a common transmission ground line, said ground line extending from the jack such when connected to an audio unit the length of the audio wire is extended.
- Such a headphone arrangement is adapted to be plugged into an adapter unit, which comprises a socket for a jack connector for connection to a receiver/audio unit, and connected to said jack connector and extending theref om first and second feeds each comprising a wire connected to left and right headphones respectively, and including a transmission line/screen lead/ground feed extending, from the connector at a proximal end, partially along the length of the left and right feed from said connector, and for each headphone, an earth connection wire extending partially along the length of the audio feeds to a common point connection, said common point connection being connected to the distal end of said ground feed via an impedance and wherein each of said earth connections is connected to the respective audio line via a capacitance.
- an adapter unit which comprises a socket for a jack connector for connection to a receiver/audio unit, and connected to said jack connector and extending theref om first and second feeds each comprising a wire connected to left and right headphones respectively, and including a transmission line/screen
- the transmission line is preferably a co-axial cable or it may form, along with the other wires, a twisted three core lead.
- FIG. 2 shows schematic and practical embodiments of the invention
- Figure 3 shows a preferred embodiment of the invention showing a refinement of the figure 2 embodiment
- FIG. 4 shows an alternative embodiment of the invention
- Figure 5 illustrates the practical dimensions of leads according to preferred embodiments of the invention.
- Figure la shows a simple representation of a simple dipole antenna 1 housed in a housing 2 of a receiver transmitter 3 and with radiation resistance R ⁇ t.
- the antenna 1 is fed directly by a self contained (i.e. no power or ground connections) and electro- magnetically fully screened RF source of matched impedance.
- the antenna is referred to as a transmitter rather than operating in a receiving mode and this facilitates explanation.
- an RF source is considered to be sufficiently small then its housing 2 can be included in a lower part of the dipole as shown in Figure lb.
- the inventor has determined that by extending this concept, the exact location of the RF source, within the lower half of the dipole, is immaterial.
- the RF source can be re-located to the bottom of the lower part of the dipole using a coaxial feed 4 (or other extension of the housing) up the centre of the lower part of the dipole with no change in electro-magnetic radiation behaviour of the antenna system as shown in Figure lc.
- the effective electrical length of this coaxial feeder part of the system is immaterial to the antenna function.
- Figure 2a shows an adaptation of a standard headphone system to an embodiment of the invention based on the principle of the invention.
- Figure 2a shows a receiver unit 5 having left 6 and right 7 audio output being fed via a socket 8 to a stereo headphone jack 9 connected to left and right headphones 10 and 11 respectively via a point where the lead divides from which audio/ground pairs continue to each ear piece.
- Each of the headphones also has a ground connection 12 which is connected to casing 13 of the receiver unit.
- Figure 2d shows an alternative embodiment of the invention.
- the arrangement comprises two ear phones each having a pair of audio leads 16 a,b and 17 a,b.
- One of each of the pair of audio leads 16a and 17a is connected to a jack which is shown in connection with the receiver unit 18.
- the jack connection in the socket 19 is such that the leads 16a and 17a are connected to left and right outputs from an audio unit 20, each via a further impedance 21, 22. This impedance is high at RF but low at audio frequencies.
- the leads are also connected to the receiver unit via capacitances 23 and 24. In this way the headphones act as an antenna for input into the receiver 25 of the receiver unit as well as the output from the audio unit.
- leads to the headphones 16b and 17b which may be regarded as ground leads are truncated and connected together to a common point "A".
- Leads 16a and 17a are also connected to this point via capacitors 26 and 27.
- Leads 16b and 17b are further connected, via inductor 28 (which is of high impedance at RF but low impedance at audio frequencies) to the end of a coaxial cable 29.
- the coaxial cable 29 is essentially a sheathing around the jack and is connected or earthed to receiver unit housing 30.
- the impedance of a dipole is typically higher than the commonly used 50 ⁇ RF interface to the receiver.
- An impedance transform with a suitable two-element matching network, is preferred to achieve an enhanced performance.
- Figure 3c This is implemented schematically in Figures 3a and 3b. A practical implementation is shown in Figure 3c. The arrangement is similar to that of Figure 2c except, that it includes for each earpiece, a parallel arrangement of a capacitance 31, and impedance 32. Dotted line in the Figure 3 c represents a matching circuit.
- the DAB VHF band is from 175MHz to 239 MHz and is centred on 208MHz which has a wavelength of 36cm. Whilst this length is ideal for an individual ear-piece feeder (comprising a top half of a dipole), it is too short to be of practical use, as the lower portion of a headphone lead set includes the radio device itself. Pocket radio product headsets typically have an overall antenna length in excess of lm.
- An embodiment of the invention incorporates these practical requirements and uses an asymmetrical dipole, in which upper half is approximately ⁇ /4 but the lower half is closer to around 3 ⁇ /4. This is shown in Figure 4.
- the resulting load impedance change in this design step is simply absorbed in the choice of value of the matching components. By use of such matching as is appropriate, a wide range of lead lengths can be accommodated.
- a co-axial feeder is used as an effective extension of the casing.
- the invention is not limited to the use of a co-axial cable as the transmission (feed) line.
- a further practical advantage of the invention is that it requires relatively low cost components.
- the end-fed dipole antenna classically uses a coaxial feeder, the principle of its operation does not rely on this. As long as the feeder behaves as a transmission line at the RF frequencies concerned, (which can be ascertained by measurement of the loss per unit length of the line), then the field within the feeder structure is "locally-contained" and the end-fed dipole principle applies. Thin, flexible twin core coaxial lead is expensive and alternatives may be used.
- a twisted three-core lead is used.
- the inventor has determined by measurements of the transmission line properties of a commercially available headphone lead wire with twisted three core, that it gives a reasonably low loss per unit length.
- the cable has a characteristic impedance approximate to 50 ⁇ .
- An embodiment employing this cable is shown in Figure 5.
- Transmission feed line comprises a three-core lead, using one of the cores as the RF "ground” and the other two to function collectively as carrier of the RF signal.
- the principle of using a three-core lead as RF feeder works equally well with signal and ground lines reversed but the particular orientation chosen is most appropriate for integrating with additional functionality of a stereo audio connection.
- the other two are the leads connecting the headphone to the jack.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Headphones And Earphones (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2004-7003877A KR20040033317A (en) | 2001-09-17 | 2002-09-17 | A headphone |
EP02779397A EP1428410A2 (en) | 2001-09-17 | 2002-09-17 | A headphone |
CA002460658A CA2460658A1 (en) | 2001-09-17 | 2002-09-17 | A headphone |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0122261.1 | 2001-09-17 | ||
GBGB0122261.1A GB0122261D0 (en) | 2001-09-17 | 2001-09-17 | Headphone antenna for vhf radio |
GB0203361.1 | 2002-02-13 | ||
GB0203361A GB2380861B (en) | 2001-09-17 | 2002-02-13 | Headphone lead/antenna system |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2003026342A2 true WO2003026342A2 (en) | 2003-03-27 |
WO2003026342A3 WO2003026342A3 (en) | 2004-03-11 |
Family
ID=26246547
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2002/010612 WO2003026342A2 (en) | 2001-09-17 | 2002-09-17 | A headphone |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1428410A2 (en) |
CA (1) | CA2460658A1 (en) |
WO (1) | WO2003026342A2 (en) |
Cited By (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1589609A2 (en) * | 2004-04-19 | 2005-10-26 | Sony Corporation | Earphone antenna and portable radio equipment provided with earphone antenna |
EP1605545A1 (en) * | 2004-06-04 | 2005-12-14 | Sony Corporation | Earphone antenna and portable radio equipment provided with earphone antenna |
EP1659822A1 (en) * | 2004-07-08 | 2006-05-24 | Sony Corporation | Earphone antenna connecting device and portable wireless device |
CN1328822C (en) * | 2003-10-29 | 2007-07-25 | 日本电气株式会社 | Antenna device |
WO2008040399A1 (en) * | 2006-10-06 | 2008-04-10 | Sony Ericsson Mobile Communications Ab | Integrated television antenna for a portable communication device |
WO2008128581A1 (en) * | 2007-04-23 | 2008-10-30 | Sony Ericsson Mobile Communications Ab | Dipole antenna for a portable communication device |
CN100452531C (en) * | 2004-04-19 | 2009-01-14 | 索尼株式会社 | Earphone antenna and portable radio equipment provided with earphone antenna |
EP2182644A2 (en) * | 2008-10-30 | 2010-05-05 | Samsung Electronics Co., Ltd. | Antenna device for portable wireless terminal |
EP2192531A1 (en) * | 2008-11-27 | 2010-06-02 | Gemalto SA | Elektrischer / Elektronischer Schaltkreis zum Verbinden einer Vorrichtung mit einer Funkantenne |
DE102009043175A1 (en) * | 2009-09-26 | 2011-04-07 | WTS Kereskedelmi és Szolgáltató Kft. | Lighting device for swimming pool during dark evening hour, has lamp unit connected to external power source via connecting line, and remote controller standing in effective connection with lamp unit via connecting line |
CN101136643B (en) * | 2005-10-07 | 2012-05-23 | 索尼株式会社 | Earphone antenna |
EP2747448A1 (en) * | 2011-08-18 | 2014-06-25 | ZTE Corporation | Handset device, handset, and method for processing signal by using handset device |
US8855353B2 (en) | 2007-12-20 | 2014-10-07 | Nxp, B.V. | Headset loop antenna for audio devices |
EP2088804B1 (en) | 2008-02-06 | 2015-05-27 | Starkey Laboratories, Inc. | Antenna used in conjunction with the conductors for an audio transducer |
US9237405B2 (en) | 2013-11-11 | 2016-01-12 | Gn Resound A/S | Hearing aid with an antenna |
US9237404B2 (en) | 2012-12-28 | 2016-01-12 | Gn Resound A/S | Dipole antenna for a hearing aid |
US9293814B2 (en) | 2010-10-12 | 2016-03-22 | Gn Resound A/S | Hearing aid with an antenna |
US9369813B2 (en) | 2012-07-06 | 2016-06-14 | Gn Resound A/S | BTE hearing aid having two driven antennas |
US9402141B2 (en) | 2012-07-06 | 2016-07-26 | Gn Resound A/S | BTE hearing aid with an antenna partition plane |
US9408003B2 (en) | 2013-11-11 | 2016-08-02 | Gn Resound A/S | Hearing aid with an antenna |
US9446233B2 (en) | 2007-05-31 | 2016-09-20 | Gn Resound A/S | Behind-the-ear (BTE) prosthetic device with antenna |
EP2076065B2 (en) † | 2007-12-27 | 2016-11-16 | Oticon A/S | Hearing device and method for a wireless receiving and/or sending of data |
US9554219B2 (en) | 2012-07-06 | 2017-01-24 | Gn Resound A/S | BTE hearing aid having a balanced antenna |
US9686621B2 (en) | 2013-11-11 | 2017-06-20 | Gn Hearing A/S | Hearing aid with an antenna |
US9729979B2 (en) | 2010-10-12 | 2017-08-08 | Gn Hearing A/S | Antenna system for a hearing aid |
US9883295B2 (en) | 2013-11-11 | 2018-01-30 | Gn Hearing A/S | Hearing aid with an antenna |
US10595138B2 (en) | 2014-08-15 | 2020-03-17 | Gn Hearing A/S | Hearing aid with an antenna |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4369521A (en) * | 1980-06-26 | 1983-01-18 | Sony Corporation | Radio receiving apparatus using headphone connector cable as an antenna |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5989004A (en) * | 1982-11-12 | 1984-05-23 | Matsushita Electric Ind Co Ltd | Antenna device of portable acoustic device |
-
2002
- 2002-09-17 CA CA002460658A patent/CA2460658A1/en not_active Abandoned
- 2002-09-17 WO PCT/EP2002/010612 patent/WO2003026342A2/en not_active Application Discontinuation
- 2002-09-17 EP EP02779397A patent/EP1428410A2/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4369521A (en) * | 1980-06-26 | 1983-01-18 | Sony Corporation | Radio receiving apparatus using headphone connector cable as an antenna |
Cited By (49)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1328822C (en) * | 2003-10-29 | 2007-07-25 | 日本电气株式会社 | Antenna device |
US7292705B2 (en) | 2003-10-29 | 2007-11-06 | Nec Corporation | Antenna device |
US7340285B2 (en) | 2004-04-19 | 2008-03-04 | Sony Corporation | Earphone antenna and portable radio equipment provided with earphone antenna |
EP1589609A3 (en) * | 2004-04-19 | 2005-11-30 | Sony Corporation | Earphone antenna and portable radio equipment provided with earphone antenna |
EP1589609A2 (en) * | 2004-04-19 | 2005-10-26 | Sony Corporation | Earphone antenna and portable radio equipment provided with earphone antenna |
KR101050046B1 (en) * | 2004-04-19 | 2011-07-19 | 소니 주식회사 | Portable radio with earphone antenna and earphone antenna |
CN100452531C (en) * | 2004-04-19 | 2009-01-14 | 索尼株式会社 | Earphone antenna and portable radio equipment provided with earphone antenna |
EP2276115A1 (en) * | 2004-06-04 | 2011-01-19 | Sony Corporation | Earphone antenna and portable radio equipment provided with earphone antenna |
US7373169B2 (en) | 2004-06-04 | 2008-05-13 | Sony Corporation | Earphone antenna and portable radio equipment provided with earphone antenna |
EP1605545A1 (en) * | 2004-06-04 | 2005-12-14 | Sony Corporation | Earphone antenna and portable radio equipment provided with earphone antenna |
EP1659822A1 (en) * | 2004-07-08 | 2006-05-24 | Sony Corporation | Earphone antenna connecting device and portable wireless device |
EP1659822A4 (en) * | 2004-07-08 | 2006-08-30 | Sony Corp | Earphone antenna connecting device and portable wireless device |
CN101136643B (en) * | 2005-10-07 | 2012-05-23 | 索尼株式会社 | Earphone antenna |
CN101548430A (en) * | 2006-10-06 | 2009-09-30 | 索尼爱立信移动通讯有限公司 | Integrated television antenna for a portable communication device |
US7701398B2 (en) | 2006-10-06 | 2010-04-20 | Sony Ericsson Mobile Communications Ab | Antenna for portable communication device |
WO2008040399A1 (en) * | 2006-10-06 | 2008-04-10 | Sony Ericsson Mobile Communications Ab | Integrated television antenna for a portable communication device |
WO2008128581A1 (en) * | 2007-04-23 | 2008-10-30 | Sony Ericsson Mobile Communications Ab | Dipole antenna for a portable communication device |
US7787920B2 (en) | 2007-04-23 | 2010-08-31 | Sony Ericsson Mobile Communications Ab | Dipole antenna for a portable communication device |
US11123559B2 (en) | 2007-05-31 | 2021-09-21 | Cochlear Limited | Acoustic output device with antenna |
US10219084B2 (en) | 2007-05-31 | 2019-02-26 | Gn Hearing A/S | Acoustic output device with antenna |
US9936312B2 (en) | 2007-05-31 | 2018-04-03 | Gn Hearing A/S | Acoustic output device with antenna |
US9446233B2 (en) | 2007-05-31 | 2016-09-20 | Gn Resound A/S | Behind-the-ear (BTE) prosthetic device with antenna |
US11491331B2 (en) | 2007-05-31 | 2022-11-08 | Cochlear Limited | Acoustic output device with antenna |
US11819690B2 (en) | 2007-05-31 | 2023-11-21 | Cochlear Limited | Acoustic output device with antenna |
US9467781B2 (en) | 2007-12-20 | 2016-10-11 | Nxp B.V. | Headset loop antenna for audio devices |
US8855353B2 (en) | 2007-12-20 | 2014-10-07 | Nxp, B.V. | Headset loop antenna for audio devices |
EP2076065B2 (en) † | 2007-12-27 | 2016-11-16 | Oticon A/S | Hearing device and method for a wireless receiving and/or sending of data |
EP2088804B1 (en) | 2008-02-06 | 2015-05-27 | Starkey Laboratories, Inc. | Antenna used in conjunction with the conductors for an audio transducer |
US8271060B2 (en) | 2008-10-30 | 2012-09-18 | Samsung Electronics Co., Ltd | Antenna device for portable wireless terminal |
EP2182644A2 (en) * | 2008-10-30 | 2010-05-05 | Samsung Electronics Co., Ltd. | Antenna device for portable wireless terminal |
EP2182644A3 (en) * | 2008-10-30 | 2011-03-30 | Samsung Electronics Co., Ltd. | Antenna device for portable wireless terminal |
EP2192531A1 (en) * | 2008-11-27 | 2010-06-02 | Gemalto SA | Elektrischer / Elektronischer Schaltkreis zum Verbinden einer Vorrichtung mit einer Funkantenne |
WO2010060956A1 (en) * | 2008-11-27 | 2010-06-03 | Gemalto Sa | Electric/electronic circuit for connecting a device to a radiofrequency antenna |
DE102009043175A1 (en) * | 2009-09-26 | 2011-04-07 | WTS Kereskedelmi és Szolgáltató Kft. | Lighting device for swimming pool during dark evening hour, has lamp unit connected to external power source via connecting line, and remote controller standing in effective connection with lamp unit via connecting line |
US9293814B2 (en) | 2010-10-12 | 2016-03-22 | Gn Resound A/S | Hearing aid with an antenna |
US10390150B2 (en) | 2010-10-12 | 2019-08-20 | Gn Hearing A/S | Antenna system for a hearing aid |
US10728679B2 (en) | 2010-10-12 | 2020-07-28 | Gn Hearing A/S | Antenna system for a hearing aid |
US9729979B2 (en) | 2010-10-12 | 2017-08-08 | Gn Hearing A/S | Antenna system for a hearing aid |
EP2747448A1 (en) * | 2011-08-18 | 2014-06-25 | ZTE Corporation | Handset device, handset, and method for processing signal by using handset device |
EP2747448A4 (en) * | 2011-08-18 | 2015-01-21 | Zte Corp | Handset device, handset, and method for processing signal by using handset device |
US9402141B2 (en) | 2012-07-06 | 2016-07-26 | Gn Resound A/S | BTE hearing aid with an antenna partition plane |
US9554219B2 (en) | 2012-07-06 | 2017-01-24 | Gn Resound A/S | BTE hearing aid having a balanced antenna |
US9369813B2 (en) | 2012-07-06 | 2016-06-14 | Gn Resound A/S | BTE hearing aid having two driven antennas |
US9237404B2 (en) | 2012-12-28 | 2016-01-12 | Gn Resound A/S | Dipole antenna for a hearing aid |
US9883295B2 (en) | 2013-11-11 | 2018-01-30 | Gn Hearing A/S | Hearing aid with an antenna |
US9686621B2 (en) | 2013-11-11 | 2017-06-20 | Gn Hearing A/S | Hearing aid with an antenna |
US9408003B2 (en) | 2013-11-11 | 2016-08-02 | Gn Resound A/S | Hearing aid with an antenna |
US9237405B2 (en) | 2013-11-11 | 2016-01-12 | Gn Resound A/S | Hearing aid with an antenna |
US10595138B2 (en) | 2014-08-15 | 2020-03-17 | Gn Hearing A/S | Hearing aid with an antenna |
Also Published As
Publication number | Publication date |
---|---|
EP1428410A2 (en) | 2004-06-16 |
CA2460658A1 (en) | 2003-03-27 |
WO2003026342A3 (en) | 2004-03-11 |
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