WO1997014582A1 - Acoustically coupled hands free adaptor for mobile telephones - Google Patents

Acoustically coupled hands free adaptor for mobile telephones Download PDF

Info

Publication number
WO1997014582A1
WO1997014582A1 PCT/AU1996/000649 AU9600649W WO9714582A1 WO 1997014582 A1 WO1997014582 A1 WO 1997014582A1 AU 9600649 W AU9600649 W AU 9600649W WO 9714582 A1 WO9714582 A1 WO 9714582A1
Authority
WO
WIPO (PCT)
Prior art keywords
hands free
cradle
acoustically coupled
mobile telephone
acoustic coupling
Prior art date
Application number
PCT/AU1996/000649
Other languages
French (fr)
Inventor
David Scott Whitby
Original Assignee
David Scott Whitby
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 David Scott Whitby filed Critical David Scott Whitby
Priority to AU72069/96A priority Critical patent/AU7206996A/en
Publication of WO1997014582A1 publication Critical patent/WO1997014582A1/en

Links

Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
    • B60R11/02—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof
    • B60R11/0247—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof for microphones or earphones
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
    • B60R11/02—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof
    • B60R11/0241—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof for telephones
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
    • B60R2011/0042—Arrangements for holding or mounting articles, not otherwise provided for characterised by mounting means
    • B60R2011/0049—Arrangements for holding or mounting articles, not otherwise provided for characterised by mounting means for non integrated articles
    • B60R2011/005—Connection with the vehicle part
    • B60R2011/0063—Connection with the vehicle part using adhesive means, e.g. hook and loop fasteners
    • 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

Definitions

  • the present invention relates to apparatus which when used in conjunction with a normal hand held mobile telephone hereafter called mobile telephone enables such a telephone to be used for two way conversation without the necessity for the said mobile te phone to be held to the ear of the user and thus leaving the users hands free to perform other tasks such as driving a motor vehicle.
  • this invention relates to hands free apparatus that does not require any electrical power or electronic amplification to perform its function.
  • the said electronic designs usually are connected into the electroniccircuitry of the mobile telephone
  • the said electronic designs require operating power which is usually obtained from the motor vehicles electrical svstem.
  • the said electronic designs along with the mechanical housing and telephone cradle associated with them are usually fixed into the motor vehicle by fasteners such as screws and they require installation by specialists although there are some electronic designs available which are not fixed but simply plug into the motor vehicle cigarette lighter socket to obtain electrical power and are plugged also by a cable and connector intothe mobile telephone electronics circuitry.
  • a major disadvantage of the need to connect to the mobile telephone circuitry is the fact that there are a large number of different mobile telephone manufacturers and model types with consequently differing electronic circuitry and electrical connector configurations.
  • the hands free apparatus of this present invention may reduce costs when compared with the said electronic designs because it contains no electronic circuitry or microphones or loudspeakers and thus requires fewer components than the said electronic designs.
  • the hands free apparatus of this present invention may reduce costs when compared to the said electronic designs because it requires no specialist
  • the hands free apparatus of this present invention may be successfully used with a wide range of models and types of mobile telephones when compared with a single model of the said electronic designs because the apparatus of this present invention does not require to be connected to the electronic circuitry of the mobile telephone and hence the need for different electrical connectors for different mobile telephone models and types is eliminated.
  • the apparatus of this present invention provides a mobile telephone hands free adaptor comprising a holder hereafter called the cradle which holds and positions the mobile telephone in a location in the motor vehicle which is close enough to the mobile telephone users mouth for adequate voice pick up by the normal microphone of the mobile telephone when the mobile telephone user is seated in the driver seat of the motor vehicle.
  • the cradle provides an acoustic coupling chamber here after called the acoustic coupling cavity which seals over the earpiece area of the mobile telephone when the mobile telephone is placed into the cradle.
  • the mechanism on which the acoustic coupling cavity is mounted is adjustable so that the acoustic coupling cavity may be moved and set up in different positions to accommodate mobile telephones of differing dimensions.
  • An outlet from the acoustic coupling cavity is connected to a flexible sound transmission tube of sufficient length to reach the car or cars of the mobile telephone user when seated in the drivers seat of the motor vehicle.
  • An ear piece of suitable material and shape to fit into the ear of the mobile telephone user is provided to the end of the sound transmission tube so that the sound energy from the tube will be conducted efficiently into the users ear.
  • the end of the sound tube can be adapted to feed the acoustic energy into an electronic processing device to produce loudspeaker or electrical output.
  • the cradle consists of an elongated plate with downward protrusions which fit into the motor vehicle drivers side window cavity and so hold the plate resting on the window ledge.
  • the said downward protrusions are eliminated and the said plate is fastened to the drivers side w indow ledge by a hook and loop fastener system such as velcro ® and it will be realised that with this type of fastening system the invention may be mounted on other surfaces with in the motor vehicle instead of just the drivers side window ledge,
  • the said plate also provides one or more upward protrusions which are positioned to keep the mobile phone in place on its back on the plate.
  • the said plate also provides a slotted upward protrusion at the end of the plate corresponding to the earpiece end of the mobile telephone and to this protrusion by means of a screw and finger nut or other fastener a moveable slotted bracket is provided which holds an acoustic coupling cavity with a resilient seal which can be positioned to seal over the earpiece of mobile phones of differing dimensions by adjusting the bracket relative to the
  • the inner diameter of the acoustic coupling cavity which is preferably circular in shape is made sufficiently large in diameter to allow some off centredness of the mobile telephone with respect to the acoustic coupling cavity so that mobile telephones of various widths or with various earpiece outlet positions can be accommodated w hilst maintaining a good acoustic seal.
  • a sound transmission tube is provided for transmission of the sound from an opening in the acoustic coupling cavity to an earpiece or adaptor to couple the sound into the mobile telephone users ear or as previously mentioned to an electronic processing device.
  • the cradle including the movable slotted bracket may be made from any suitable material such as metal or moulded plastic.
  • the acoustic coupling cavity resilient seal can be made of any suitable material such as rubber or foam plastic.
  • the sound transmission tube may be made from any suitable flexible material such as rubber or plastic.
  • FIG 1 Shows a side view of the invention with a representative mobile telephone in the cradle and with a cross sectional view of the acoustic coupling cavity.
  • FIG 2 Shows an end view of the invention without a mobile phone in the cradle and with a cross sectional view of the acoustic coupling cavity.
  • the acoustically coupled hands free adaptor of this invention comprises an elongated plate 1 on which the back of the mobile phone 14 sits and an upward projection 2 which keeps mobile phone in its correct position on the plate.
  • Upward projection 4 has a slot running up and down its length and is fastened through the slot by screw 6 and finger nut 7 to slotted bracket 5 which supports acoustic cavity 8 formed by resilient seal 9.
  • Angled elbow 10 connects the acoustic coupling cavity 8 to the sound transmission tube 11 which conducts the sound from the acoustic chamber 8 to the earpiece comprising angled elbow 12 and resilient pad 13.
  • Fig 2 shows and end view of the invention with the same component numbering as fig 1.
  • the angle of downward projection 3 may be approximately 90 degrees with respect to plate 1 or less than 90 degrees so that the mobile telephone will be tilted towards the interior of the motor vehicle and held against upward projection 2 by gravity and also the mobile telephone display screen may be more easily viewed by the mobile telephone user.
  • upward projection 2 would be on the opposite side of plate 1 from that shown in the drawings and downward projection 3 would be on the opposite side of plate 4 from that shown in the drawings.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)

Abstract

An acoustically coupled hands free adaptor for mobile phones is described. The adaptor is a cradle with an adjustably fixable acoustic coupling cavity which couples automatically to the earpiece of a mobile phone that is inserted into the cradle. A sound tube is connected to the acoustic coupling cavity to conduct the sound to an external earpiece or electronic processing unit.

Description

ACOUSTICALLY COUPLED HANDS FREE ADAPTOR FOR
MOBILE TELEPHONES.
The present invention relates to apparatus which when used in conjunction with a normal hand held mobile telephone hereafter called mobile telephone enables such a telephone to be used for two way conversation without the necessity for the said mobile te phone to be held to the ear of the user and thus leaving the users hands free to perform other tasks such as driving a motor vehicle.
In particular this invention relates to hands free apparatus that does not require any electrical power or electronic amplification to perform its function.
The use of mobile phones in the normal way whilst driving a motor vehicle is considered a safety hazard in many countries and legislation is in place or being prepared to make the practice illegal.
There are designs of electronic hands free adaptors or add on units which use microphones external to the telephone, electronic processing and amplifying circuitry and electrical loudspeakers or earphones to perform the hands free function when used in conjunction with a normal hand held mobile telephone.
The said electronic designs usually are connected into the electroniccircuitry of the mobile telephone
The said electronic designs require operating power which is usually obtained from the motor vehicles electrical svstem. The said electronic designs along with the mechanical housing and telephone cradle associated with them are usually fixed into the motor vehicle by fasteners such as screws and they require installation by specialists although there are some electronic designs available which are not fixed but simply plug into the motor vehicle cigarette lighter socket to obtain electrical power and are plugged also by a cable and connector intothe mobile telephone electronics circuitry.
A major disadvantage of the need to connect to the mobile telephone circuitry is the fact that there are a large number of different mobile telephone manufacturers and model types with consequently differing electronic circuitry and electrical connector configurations.
The aforementioned large range of mobile telephone types necessarily requires many different models of hands free adaptors to cover a significant number of mobile telephone models and types.
The hands free apparatus of this present invention may reduce costs when compared with the said electronic designs because it contains no electronic circuitry or microphones or loudspeakers and thus requires fewer components than the said electronic designs.
The hands free apparatus of this present invention may reduce costs when compared to the said electronic designs because it requires no specialist
installation and has no electrical wiring to be connected into the motor vehicles electrical system. The hands free apparatus of this present invention may be successfully used with a wide range of models and types of mobile telephones when compared with a single model of the said electronic designs because the apparatus of this present invention does not require to be connected to the electronic circuitry of the mobile telephone and hence the need for different electrical connectors for different mobile telephone models and types is eliminated.
The apparatus of this present invention provides a mobile telephone hands free adaptor comprising a holder hereafter called the cradle which holds and positions the mobile telephone in a location in the motor vehicle which is close enough to the mobile telephone users mouth for adequate voice pick up by the normal microphone of the mobile telephone when the mobile telephone user is seated in the driver seat of the motor vehicle.
The cradle provides an acoustic coupling chamber here after called the acoustic coupling cavity which seals over the earpiece area of the mobile telephone when the mobile telephone is placed into the cradle.
The mechanism on which the acoustic coupling cavity is mounted is adjustable so that the acoustic coupling cavity may be moved and set up in different positions to accommodate mobile telephones of differing dimensions.
An outlet from the acoustic coupling cavity is connected to a flexible sound transmission tube of sufficient length to reach the car or cars of the mobile telephone user when seated in the drivers seat of the motor vehicle.
An ear piece of suitable material and shape to fit into the ear of the mobile telephone user is provided to the end of the sound transmission tube so that the sound energy from the tube will be conducted efficiently into the users ear.
Alternatively instead of an earpiece the end of the sound tube can be adapted to feed the acoustic energy into an electronic processing device to produce loudspeaker or electrical output.
In one form of the invention the cradle consists of an elongated plate with downward protrusions which fit into the motor vehicle drivers side window cavity and so hold the plate resting on the window ledge.
In another form of the invention the said downward protrusions are eliminated and the said plate is fastened to the drivers side w indow ledge by a hook and loop fastener system such as velcro ® and it will be realised that with this type of fastening system the invention may be mounted on other surfaces with in the motor vehicle instead of just the drivers side window ledge, The said plate also provides one or more upward protrusions which are positioned to keep the mobile phone in place on its back on the plate.
The said plate also provides a slotted upward protrusion at the end of the plate corresponding to the earpiece end of the mobile telephone and to this protrusion by means of a screw and finger nut or other fastener a moveable slotted bracket is provided which holds an acoustic coupling cavity with a resilient seal which can be positioned to seal over the earpiece of mobile phones of differing dimensions by adjusting the bracket relative to the
slotted protrusion and setting the position by tightening the finger nut or other fastener.
Once set for a particular mobile telephone that mobile telephone can be placed into the cradle to automatically obtain an acoustic seal over the mobile telephone earpiece and the mobile telephone may be removed and replaced in the cradle at will without the need to readjust the acoustic coupling cavity position.
The inner diameter of the acoustic coupling cavity which is preferably circular in shape is made sufficiently large in diameter to allow some off centredness of the mobile telephone with respect to the acoustic coupling cavity so that mobile telephones of various widths or with various earpiece outlet positions can be accommodated w hilst maintaining a good acoustic seal.
A sound transmission tube is provided for transmission of the sound from an opening in the acoustic coupling cavity to an earpiece or adaptor to couple the sound into the mobile telephone users ear or as previously mentioned to an electronic processing device.
The cradle including the movable slotted bracket may be made from any suitable material such as metal or moulded plastic. The acoustic coupling cavity resilient seal can be made of any suitable material such as rubber or foam plastic.
The sound transmission tube may be made from any suitable flexible material such as rubber or plastic.
To assist with the understanding of the invention , references will now be made to the accompanying drawings.
In the drawings
FIG 1 Shows a side view of the invention with a representative mobile telephone in the cradle and with a cross sectional view of the acoustic coupling cavity.
FIG 2 Shows an end view of the invention without a mobile phone in the cradle and with a cross sectional view of the acoustic coupling cavity.
Referring to fig 1 it can be seen that the acoustically coupled hands free adaptor of this invention comprises an elongated plate 1 on which the back of the mobile phone 14 sits and an upward projection 2 which keeps mobile phone in its correct position on the plate.
Downward projections 3 from the opposite side edge of the plate 1 are for fitting down into the motor vehicle drivers side window cavity in order to
hold the entire assembly in position with the underside of plate 1 resting on the drivers side window ledge. Upward projection 4 has a slot running up and down its length and is fastened through the slot by screw 6 and finger nut 7 to slotted bracket 5 which supports acoustic cavity 8 formed by resilient seal 9.
Angled elbow 10 connects the acoustic coupling cavity 8 to the sound transmission tube 11 which conducts the sound from the acoustic chamber 8 to the earpiece comprising angled elbow 12 and resilient pad 13.
Thus it can be seen that sound from the mobile telephone earpiece 15 is conveyed via acoustic coupling cavity sound tube 11 to the earpiece 12 and 13 and hence to the ear of he mobile telephone user who consequently does not have to hold the telephone and the sound from the mobile telephone users voice is picked up successfully by the normal microphone of the mobile telephone 14 because the mounting position ie. drivers side window ledge is relatively close to the users mouth to give adequate transmission by the mobile phone system.
Fig 2 shows and end view of the invention with the same component numbering as fig 1.
The relative positions and angles of 1, 2, 3 and 4 can be seen more clearly in this drawing as well as the slots in 4 and 5 and the only component not visible in this drawing is finger nut 7.
The angle of downward projection 3 may be approximately 90 degrees with respect to plate 1 or less than 90 degrees so that the mobile telephone will be tilted towards the interior of the motor vehicle and held against upward projection 2 by gravity and also the mobile telephone display screen may be more easily viewed by the mobile telephone user.
The relative position of upward projection 2 and downward projection 3 are shown in Fig 1 and Fig 2 as for right hand drive vehicles.ie for mounting of the invention on the right hand side indow ledge of the motor vehicle.
For left hand drive vehicles (ie) for mounting of the invention on the left side window ledge of a left hand drive motor vehicle,upward projection 2 would be on the opposite side of plate 1 from that shown in the drawings and downward projection 3 would be on the opposite side of plate 4 from that shown in the drawings.
The drawings of Fig 1 and Fig 2 show the basis of a preferred embodiment of the invention but it is to be understood that various alterations, modifications and / or additions may be introduced into the construction and arrangements of parts previously described without departing from the spirit or ambit of the invention.

Claims

1. An acoustically coupled hands free adaptor for mobile telephones comprising a cradle providing an adjustably fixable position acoustic coupling cavity which is provided to couple automatically to the earpiece of a mobile telephone type that it has been adjusted and fixed to suit when that type mobile telephone is inserted into the cradle.
2. The acoustically coupled hands free adaptor of claim 1 wherein a flexible sound tube is connected to the acoustic coupling cavity for transmission of the acoustic energy from the acoustic coupling cavity to an external earpiece or an electronic processing unit.
3. The acoustically coupled hands free adaptor of claim 2 wherein the cradle provides one or more downward projections adapted to fit down into the window cavity of a side window of a motor vehicle to hold the cradle mounted on the inside ledge of the said side window.
4. The acoustically coupled hands free adaptor of claim 2 wherein the cradle maybe mounted on any suitable surface in a motor vehicle or other location by means of a loop and hook fastener system such as Velcro (R)
5 An acoustically coupled hands free adaptor for mobile telephones substantially as herein described with reference to the accompanying drawings.
PCT/AU1996/000649 1995-10-18 1996-10-18 Acoustically coupled hands free adaptor for mobile telephones WO1997014582A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU72069/96A AU7206996A (en) 1995-10-18 1996-10-18 Acoustically coupled hands free adaptor for mobile telephones

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPN6016 1995-10-18
AUPN6016A AUPN601695A0 (en) 1995-10-18 1995-10-18 Acoustically coupled handsfree adaptor for handheld mobile telephones

Publications (1)

Publication Number Publication Date
WO1997014582A1 true WO1997014582A1 (en) 1997-04-24

Family

ID=3790343

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1996/000649 WO1997014582A1 (en) 1995-10-18 1996-10-18 Acoustically coupled hands free adaptor for mobile telephones

Country Status (2)

Country Link
AU (1) AUPN601695A0 (en)
WO (1) WO1997014582A1 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998020661A1 (en) * 1996-11-07 1998-05-14 Aust-Indo Tech Pty. Limited Mobile phone accessory
EP1055563A1 (en) * 1999-05-27 2000-11-29 Eagle FAN Improved hand-free holding apparatus for mobile telephone set
GB2361138A (en) * 2000-04-04 2001-10-10 Hassan Paddy Abdel Salam Mobile phone with acoustic duct extending from earpiece
AU740458B2 (en) * 1997-07-03 2001-11-01 Geoffrey Allan Thomas Hands-free accessory for mobile telephones
GB2362535A (en) * 2000-04-25 2001-11-21 Safetalk Ltd Non-electrical headset link for mobile phones
GB2365654A (en) * 2000-04-11 2002-02-20 Benjamin Edginton R.F. isolator for mobile telephones uses an acoustic tube
GB2366117A (en) * 2000-08-19 2002-02-27 Brian Graystone Hands-free accessory with acoustic link
GB2376591A (en) * 2001-05-08 2002-12-18 Andreas Simeou Hands-free device with no electronics
GB2377116A (en) * 2001-06-29 2002-12-31 Nokia Corp A holder for a portable telephone with an amplifying horn
ES2197764A1 (en) * 2001-07-13 2004-01-01 Rico Jesus Domingo Sound system for headphones and microphones. (Machine-translation by Google Translate, not legally binding)
DE10064258B4 (en) * 2000-12-22 2005-02-17 Siemens Ag Electronic terminal, in particular telecommunications terminal with sound conducting means

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU5567186A (en) * 1985-04-04 1986-10-09 Amalgamated Wireless (Australasia) Limited Acoustic coupling device
AU5567286A (en) * 1985-04-04 1986-10-09 Amalgamated Wireless (Australasia) Limited Acoustic coupling device
DE4431601A1 (en) * 1994-09-05 1995-08-10 Siemens Ag Mobile radio transceiver unit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU5567186A (en) * 1985-04-04 1986-10-09 Amalgamated Wireless (Australasia) Limited Acoustic coupling device
AU5567286A (en) * 1985-04-04 1986-10-09 Amalgamated Wireless (Australasia) Limited Acoustic coupling device
DE4431601A1 (en) * 1994-09-05 1995-08-10 Siemens Ag Mobile radio transceiver unit

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998020661A1 (en) * 1996-11-07 1998-05-14 Aust-Indo Tech Pty. Limited Mobile phone accessory
AU740458B2 (en) * 1997-07-03 2001-11-01 Geoffrey Allan Thomas Hands-free accessory for mobile telephones
EP1055563A1 (en) * 1999-05-27 2000-11-29 Eagle FAN Improved hand-free holding apparatus for mobile telephone set
GB2361138B (en) * 2000-04-04 2004-06-16 Hassan Paddy Abdel Salam Mobile phone improvements
GB2361138A (en) * 2000-04-04 2001-10-10 Hassan Paddy Abdel Salam Mobile phone with acoustic duct extending from earpiece
GB2365654A (en) * 2000-04-11 2002-02-20 Benjamin Edginton R.F. isolator for mobile telephones uses an acoustic tube
GB2362535A (en) * 2000-04-25 2001-11-21 Safetalk Ltd Non-electrical headset link for mobile phones
GB2362535B (en) * 2000-04-25 2004-10-06 Safetalk Ltd Sound-transmitting apparatus
GB2366117A (en) * 2000-08-19 2002-02-27 Brian Graystone Hands-free accessory with acoustic link
DE10064258B4 (en) * 2000-12-22 2005-02-17 Siemens Ag Electronic terminal, in particular telecommunications terminal with sound conducting means
GB2376591A (en) * 2001-05-08 2002-12-18 Andreas Simeou Hands-free device with no electronics
GB2377116A (en) * 2001-06-29 2002-12-31 Nokia Corp A holder for a portable telephone with an amplifying horn
ES2197764A1 (en) * 2001-07-13 2004-01-01 Rico Jesus Domingo Sound system for headphones and microphones. (Machine-translation by Google Translate, not legally binding)

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