Radiotelephone having a user interface module

• US 5,999,821 A
• Filed: 01/29/1997
• Issued: 12/07/1999
• Est. Priority Date: 01/29/1997
• Status: Expired due to Term

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Kaschke, Kevin D.
• Primary Examiner(s): Bost, Dwayne D.
• Assistant Examiner(s): LEGREE, TRACY MICHELLE
• Application Number:
  US08/790,643
• Time in Patent Office: 1,042 Days
• Field of Search: 455/550, 455/90, 455/575, 379/429, 379/428, 379/433, 379/442, 200/5 A, 200/11 R, 200/35 B, 361/814, 361/748, 361/728
• US Class Current: 455/575.1
• CPC Class Codes: H04M 1/0202 Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets constructional features of telephone transmitters or receivers, e.g. of speakers or microphones H04M1/03
• CPC Class Codes: H04M 1/0214 Foldable telephones, i.e. with body parts pivoting to an open position around an axis parallel to the plane they define in closed position combined with translation movement H04M1/0235
• CPC Class Codes: H04M 1/0247 comprising more than two body parts
• CPC Class Codes: H04M 1/0254 comprising one or a plurality of mechanically detachable modules
• CPC Class Codes: H04M 1/0262 for a battery compartment
• CPC Class Codes: H04M 1/035 Improving the acoustic characteristics by means of constructional features of the housing, e.g. ribs, walls, resonating chambers or cavities

Abstract

A radiotelephone (100) comprises a user interface module (102) including a membrane sheet layer (302), user interface circuitry (304) and a flexible circuit sheet layer (306), and a radio circuitry module (104) including radio circuitry (308) and a radio housing (310). The user interface circuitry (304) includes an earpiece electroacoustic transducer (322), microphone electroacoustic transducer (324), a keypad (326) and an electronic display (328) being disposed between the membrane sheet layer (302) and the flexible circuit sheet layer (306). The radio circuitry (308) is electrically coupled to the user interface circuitry (304) via electrical conductors (330-344) on the flexible circuit sheet layer (306) permitting many marketing options for the user interface module (102) and efficient manufacturing of the radiotelephone (100). The radio housing (310) encloses the radio circuitry (308) and is mechanically coupled to the user interface module (102). The user interface module (102) integrates the earpiece electroacoustic transducer (322) and the microphone electroacoustic transducer (324) as electroacoustic transducer sheet layers (402 and 414) in the user interface module (102), and includes hinge mechanisms (702, 902, 904) to produce a credit card sized radiotelephone (FIGS. 7-10).

Claims

1. A radiotelephone, comprising:

a user interface module including;

a membrane sheet layer having a top surface disposed opposite a bottom surface, the top surface being accessible to a user of the radiotelephone, the membrane sheet layer having at least one acoustic aperture extending through the membrane sheet layer between the top surface and the bottom surface,

user interface circuitry including at least one electroacoustic transducer, the at least one electroacoustic transducer being mechanically coupled to the membrane sheet layer and disposed on the bottom surface of the membrane sheet layer opposite the at least one acoustic aperture, and

a flexible circuit sheet layer having a plurality of electrical conductors electrically coupled to the user interface circuitry and disposed on the bottom surface of the membrane sheet layer,

a radio circuitry module including;

radio circuitry electrically coupled to the user interface circuitry via the electrical conductors of the flexible circuit sheet layer, and

a radio housing having the radio circuitry and adapted to be mechanically coupled to the user interface module.

2. A radiotelephone according to claim 1 wherein the user interface module further comprises:

a first adhesive layer having an outer edge portion bonded to the bottom surface of the membrane sheet layer at a periphery of the at least one acoustic aperture,

a first spacing layer having a top surface disposed opposite a bottom surface, the top surface of the first spacing layer being bonded by the first adhesive layer to the bottom surface of the membrane sheet layer at the periphery of the at least one acoustic aperture,

a second adhesive layer having an outer edge portion bonded to the bottom surface of the first spacing layer at the periphery of the at least one acoustic aperture,

an electroacoustic transducer sheet layer forming the at least one electroacoustic transducer and having a top surface disposed opposite a bottom surface, the top surface of the electroacoustic transducer sheet layer being bonded by the second adhesive layer to the bottom surface of the first spacing layer at the periphery of the at least one acoustic aperture, a first acoustic cavity being formed between the bottom surface of the membrane sheet layer and the top surface of the electroacoustic transducer sheet layer, the first acoustic cavity having a depth determined by a thickness of the first adhesive layer, the first spacing layer, and the second adhesive layer, the electroacoustic transducer sheet layer having a first set of conductive contacts electrically coupled to a first set of electrical conductors of the plurality of electrical conductors of the flexible circuit sheet layer,

a third adhesive layer having an outer edge portion bonded to the bottom surface of the electroacoustic transducer sheet layer at the periphery of the at least one acoustic aperture,

a second spacing layer having a top surface disposed opposite a bottom surface, the top surface of the second spacing layer being bonded by the third adhesive layer to the bottom surface of the electroacoustic transducer sheet layer at the periphery of the at least one acoustic aperture,

a fourth adhesive layer having an outer edge portion bonded to the bottom surface of the second spacing layer at the periphery of the at least one acoustic aperture, and

a back sheet layer having a top surface disposed opposite a bottom surface, the top surface of the back sheet layer being bonded by the fourth adhesive layer to the bottom surface of the second spacing layer at the periphery of the at least one acoustic aperture, a second acoustic cavity being formed between the bottom surface of the electroacoustic transducer sheet layer and the top surface of the back sheet layer, the second acoustic cavity having a depth determined by a thickness of the third adhesive layer, the second spacing layer, and the fourth adhesive layer.

3. A radiotelephone according to claim 2 wherein the electroacoustic transducer sheet layer comprises one of:

an earpiece electroacoustic transducer sheet layer, and

a microphone electroacoustic transducer sheet layer.

4. A radiotelephone according to claim 2 wherein the user interface module further includes:

a first hinge mechanism for rotatably coupling a first user interface portion relative to the second user interface portion,

wherein the first user interface portion includes a first electroacoustic sheet layer forming the at least one electroacoustic transducer, and

wherein the second user interface portion includes a second electroacoustic sheet layer forming the at least one electroacoustic transducer when the user interface circuitry includes the second electroacoustic sheet layer.

5. A radiotelephone according to claim 4 wherein the user interface module further includes:

a second hinge mechanism for rotatably coupling a third user interface portion relative to the second user interface portion,

wherein the third user interface portion, instead of the second user interface portion, includes the second electroacoustic sheet layer forming the at least one electroacoustic transducer when the user interface circuitry includes the second electroacoustic sheet layer.

6. A radiotelephone according to claim 1:

wherein the at least one electroacoustic transducer comprises at least one of;

an earpiece electroacoustic transducer, and

a microphone electroacoustic transducer,

wherein the flexible circuit sheet layer further includes at least one of;

a pair of electrical earpiece conductors electrically coupled to the earpiece electroacoustic transducer, and

a pair of electrical microphone conductors electrically coupled to the microphone electroacoustic transducer,

wherein the radio circuitry further includes at least one of;

a receiver electrically coupled to the earpiece electroacoustic transducer via the pair of electrical earpiece conductors, and

a transmitter electrically coupled to the microphone electroacoustic transducer via the pair of electrical microphone conductors.

7. A radiotelephone according to claim 1:

wherein the user interface circuitry further comprises;

a data input circuit,

wherein the flexible circuit sheet layer further includes;

a set of electrical data input conductors electrically coupled to the data input circuit, and

wherein the radio circuitry further includes;

a transmitter electrically coupled to the data input circuit via the set of electrical data input conductors.

8. A radiotelephone according to claim 1:

wherein the membrane sheet layer further includes;

a display aperture extending through the membrane sheet layer between the top surface and the bottom surface,

wherein the user interface circuitry further includes;

an electronic display mechanically coupled to the membrane sheet layer and disposed on the bottom surface of the membrane sheet layer opposite the display aperture,

wherein the flexible circuit sheet layer further includes;

a set of electrical display conductors electrically coupled to the electronic display,

wherein the radio circuitry further includes at least one of;

a receiver electrically coupled to the electronic display via the set of electrical display conductors, and

a transmitter electrically coupled to the electronic display via the set of electrical display conductors.

9. A radiotelephone according to claim 1:

wherein the user interface module further includes;

a first connector electrically coupled to the plurality of electrical conductors, and

wherein the radio circuitry module further includes;

a second connector adapted to be connected to the first connector to electrically couple the radio circuitry to the user interface circuitry.

10. A radiotelephone according to claim 1 further comprising:

a power supply module including;

a power supply source electrically coupled to the radio circuitry; and

a power supply housing having the power supply source and adapted to be mechanically coupled to the radio housing.

11. A radiotelephone according to claim 1 wherein the user interface module further includes:

a first hinge mechanism for rotatably coupling a first user interface portion relative to the second user interface portion,

wherein the first user interface portion includes a first electroacoustic transducer of the at least one electroacoustic transducer, and

wherein the second user interface portion includes a second electroacoustic transducer of the at least one electroacoustic transducer when the user interface circuitry includes the second electroacoustic transducer.

12. A radiotelephone according to claim 11 wherein the user interface module further includes:

a second hinge mechanism for rotatably coupling a third user interface portion relative to the second user interface portion,

wherein the third user interface portion, instead of the second user interface portion, includes the second electroacoustic transducer of the at least one electroacoustic transducer when the user interface circuitry includes the second electroacoustic transducer.

13. A radiotelephone, comprising:

a user interface module including;

a membrane sheet layer having a top surface disposed opposite a bottom surface, the top surface being accessible to a user of the radiotelephone, the membrane sheet layer having earpiece acoustic aperture, and a microphone acoustic aperture, each aperture extending through the membrane sheet layer between the top surface and the bottom surface,

user interface circuitry including an earpiece electroacoustic transducer and a microphone electroacoustic transducer, the earpiece electroacoustic transducer being mechanically coupled to the membrane sheet layer and disposed on the bottom surface of the membrane sheet layer opposite the earpiece acoustic aperture, the microphone electroacoustic transducer being mechanically coupled to the membrane sheet layer and disposed on the bottom surface of the membrane sheet layer opposite the microphone acoustic aperture,

a flexible circuit sheet layer having a plurality of electrical conductors electrically coupled to the user interface circuitry and disposed on the bottom surface of the membrane sheet layer, the plurality of electrical conductors further including;

a pair of electrical earpiece conductors electrically coupled to the earpiece electroacoustic transducer, and

a pair of electrical microphone conductors electrically coupled to the microphone electroacoustic transducer,

a radio circuitry module including;

radio circuitry electrically coupled to the user interface circuitry via the electrical conductors of the flexible circuit sheet layer, the radio circuitry further including;

a receiver electrically coupled to the earpiece electroacoustic transducer via the pair of electrical earpiece conductors, and

a transmitter electrically coupled to the microphone electroacoustic transducer via the pair of electrical microphone conductors, and

a radio housing having the radio circuitry and adapted to be mechanically coupled to the user interface module.

14. A radiotelephone according to claim 13 wherein the user interface module further comprises:

a first earpiece adhesive layer having an outer edge portion bonded to the bottom surface of the membrane sheet layer at a periphery of the earpiece acoustic aperture,

a first earpiece spacing layer having a top surface disposed opposite a bottom surface, the top surface of the first earpiece spacing layer being bonded by the first earpiece adhesive layer to the bottom surface of the membrane sheet layer at the periphery of the earpiece acoustic aperture,

a second earpiece adhesive layer having an outer edge portion bonded to the bottom surface of the first earpiece spacing layer at the periphery of the earpiece acoustic aperture,

an earpiece electroacoustic transducer sheet layer forming the earpiece electroacoustic transducer and having a top surface disposed opposite a bottom surface, the top surface of the earpiece electroacoustic transducer sheet layer being bonded by the second earpiece adhesive layer to the bottom surface of the first earpiece spacing layer at the periphery of the earpiece acoustic aperture, a first earpiece acoustic cavity being formed between the bottom surface of the membrane sheet layer and the top surface of the earpiece electroacoustic transducer sheet layer, the first earpiece acoustic cavity having a depth determined by a thickness of the first earpiece adhesive layer, the first earpiece spacing layer, and the second earpiece adhesive layer, the earpiece electroacoustic transducer sheet layer having a first set of conductive contacts electrically coupled to the pair of electrical earpiece conductors of the plurality of electrical conductors of the flexible circuit sheet layer,

a third earpiece adhesive layer having an outer edge portion bonded to the bottom surface of the earpiece electroacoustic transducer sheet layer at the periphery of the earpiece acoustic aperture,

a second earpiece spacing layer having a top surface disposed opposite a bottom surface, the top surface of the second earpiece spacing layer being bonded by the third earpiece adhesive layer to the bottom surface of the earpiece electroacoustic transducer sheet layer at the periphery of the earpiece acoustic aperture,

a fourth earpiece adhesive layer having an outer edge portion bonded to the bottom surface of the second earpiece spacing layer at the periphery of the earpiece acoustic aperture,

an earpiece back sheet layer having a top surface disposed opposite a bottom surface, the top surface of the earpiece back sheet layer being bonded by the fourth earpiece adhesive layer to the bottom surface of the second earpiece spacing layer at the periphery of the earpiece acoustic aperture, a second earpiece acoustic cavity being formed between the bottom surface of the earpiece electroacoustic transducer sheet layer and the top surface of the earpiece back sheet layer, the second earpiece acoustic cavity having a depth determined by a thickness of the third earpiece adhesive layer, the second earpiece spacing layer, and the fourth earpiece adhesive layer,

a first microphone adhesive layer having an outer edge portion bonded to the bottom surface of the membrane sheet layer at a periphery of the microphone acoustic aperture,

a first microphone spacing layer having a top surface disposed opposite a bottom surface, the top surface of the first microphone spacing layer being bonded by the first microphone adhesive layer to the bottom surface of the membrane sheet layer at the periphery of the microphone acoustic aperture,

a second microphone adhesive layer having an outer edge portion bonded to the bottom surface of the first microphone spacing layer at the periphery of the microphone acoustic aperture,

a microphone electroacoustic transducer sheet layer forming the microphone electroacoustic transducer and having a top surface disposed opposite a bottom surface, the top surface of the microphone electroacoustic transducer sheet layer being bonded by the second microphone adhesive layer to the bottom surface of the first microphone spacing layer at the periphery of the microphone acoustic aperture, a first microphone acoustic cavity being formed between the bottom surface of the membrane sheet layer and the top surface of the microphone electroacoustic transducer sheet layer, the first microphone acoustic cavity having a depth determined by a thickness of the first microphone adhesive layer, the first microphone spacing layer, and the second microphone adhesive layer, the microphone electroacoustic transducer sheet layer having a first set of conductive contacts electrically coupled to the pair of electrical microphone conductors of the plurality of electrical conductors of the flexible circuit sheet layer,

a third microphone adhesive layer having an outer edge portion bonded to the bottom surface of the microphone electroacoustic transducer sheet layer at the periphery of the microphone acoustic aperture,

a second microphone spacing layer having a top surface disposed opposite a bottom surface, the top surface of the second microphone spacing layer being bonded by the third microphone adhesive layer to the bottom surface of the microphone electroacoustic transducer sheet layer at the periphery of the microphone acoustic aperture,

a fourth microphone adhesive layer having an outer edge portion bonded to the bottom surface of the second microphone spacing layer at the periphery of the microphone acoustic aperture, and

an microphone back sheet layer having a top surface disposed opposite a bottom surface, the top surface of the microphone back sheet layer being bonded by the fourth microphone adhesive layer to the bottom surface of the second microphone spacing layer at the periphery of the microphone acoustic aperture, a second microphone acoustic cavity being formed between the bottom surface of the microphone electroacoustic transducer sheet layer and the top surface of the microphone back sheet layer, the second microphone acoustic cavity having a depth determined by a thickness of the third microphone adhesive layer, the second microphone spacing layer, and the fourth microphone adhesive layer.

15. A radiotelephone according to claim 14 wherein the user interface module further includes:

a first hinge mechanism for rotatably coupling a first user interface portion relative to the second user interface portion,

wherein the first user interface portion includes at least one of a first electroacoustic sheet layer forming the earpiece electroacoustic transducer and a second electroacoustic sheet layer forming the microphone electroacoustic transducer, and

wherein the second user interface portion includes at least one of the first electroacoustic sheet layer forming the earpiece electroacoustic transducer and the second electroacoustic sheet layer forming the microphone electroacoustic transducer when not included in the first user interface portion.

16. A radiotelephone according to claim 15 wherein the user interface module further includes:

a second hinge mechanism for rotatably coupling a third user interface portion relative to the second user interface portion,

wherein the third user interface portion includes at least one of the first electroacoustic sheet layer forming the earpiece electroacoustic transducer and the second electroacoustic sheet layer forming the microphone electroacoustic transducer when not included in the first user interface portion or the second user interface portion.

17. A radiotelephone according to claim 13:

wherein the user interface circuitry further comprises;

a data input circuit,

wherein the flexible circuit sheet layer further includes;

a set of electrical data input conductors electrically coupled to the data input circuit, and

wherein the radio circuitry further includes;

a transmitter electrically coupled to the data input circuit via the set of electrical data input conductors.

18. A radiotelephone according to claim 13:

wherein the membrane sheet layer further includes;

a display aperture extending through the membrane sheet layer between the top surface and the bottom surface,

wherein the user interface circuitry further includes;

an electronic display mechanically coupled to the membrane sheet layer and disposed on the bottom surface of the membrane sheet layer opposite the display aperture,

wherein the flexible circuit sheet layer further includes;

a set of electrical display conductors electrically coupled to the electronic display,

wherein the radio circuitry further includes at least one of;

a receiver electrically coupled to the electronic display via the set of electrical display conductors, and

a transmitter electrically coupled to the electronic display via the set of electrical display conductors.

19. A radiotelephone according to claim 13:

wherein the user interface module further includes;

a first connector electrically coupled to the plurality of electrical conductors, and

wherein the radio circuitry module further includes;

a second connector adapted to be connected to the first connector to electrically couple the radio circuitry to the user interface circuitry.

20. A radiotelephone according to claim 13 further comprising:

a power supply module including;

a power supply source electrically coupled to the radio circuitry; and

a power supply housing having the power supply source and adapted to be mechanically coupled to the radio housing.

21. A radiotelephone according to claim 13 wherein the user interface module further includes:

a first hinge mechanism for rotatably coupling a first user interface portion relative to the second user interface portion,

wherein the first user interface portion includes at least one of the earpiece electroacoustic transducer and the microphone electroacoustic transducer, and

wherein the second user interface portion includes at least one of the earpiece electroacoustic transducer and the microphone electroacoustic transducer when not included in the first user interface portion.

22. A radiotelephone according to claim 21 wherein the user interface module further includes:

a second hinge mechanism for rotatably coupling a third user interface portion relative to the second user interface portion,

wherein the third user interface portion includes at least one of the earpiece electroacoustic transducer and the microphone electroacoustic transducer when not included in the first user interface portion or the second user interface portion.

23. A radiotelephone, comprising:

a user interface module including;

a membrane sheet layer having a top surface disposed opposite a bottom surface, the top surface being accessible to a user of the radiotelephone, the membrane sheet layer having earpiece acoustic aperture, a microphone acoustic aperture, and a display aperture, each aperture extending through the membrane sheet layer between the top surface and the bottom surface,

user interface circuitry including an earpiece electroacoustic transducer, a microphone electroacoustic transducer, a data input circuit and an electronic display, the earpiece electroacoustic transducer being mechanically coupled to the membrane sheet layer and disposed on the bottom surface of the membrane sheet layer opposite the earpiece acoustic aperture, the microphone electroacoustic transducer being mechanically coupled to the membrane sheet layer and disposed on the bottom surface of the membrane sheet layer opposite the microphone acoustic aperture, the data input circuit being mechanically coupled to the membrane sheet layer and disposed on the bottom surface of the membrane sheet layer, and the electronic display being mechanically coupled to the membrane sheet layer and disposed on the bottom surface of the membrane sheet layer opposite the display aperture,

a flexible circuit sheet layer having a plurality of electrical conductors electrically coupled to the user interface circuitry and disposed on the bottom surface of the membrane sheet layer, the plurality of electrical conductors further including;

a pair of electrical earpiece conductors electrically coupled to the earpiece electroacoustic transducer,

a pair of electrical microphone conductors electrically coupled to the microphone electroacoustic transducer,

a set of electrical data input conductors electrically coupled to the data input circuit, and

a set of electrical display conductors electrically coupled to the electronic display, and

a radio circuitry module including;

radio circuitry electrically coupled to the user interface circuitry via the electrical conductors of the flexible circuit sheet layer, the radio circuitry further including;

a receiver electrically coupled to the earpiece electroacoustic transducer via the pair of electrical earpiece conductors and electrically coupled to the electronic display via the set of electrical display conductors, and

a transmitter electrically coupled to the microphone electroacoustic transducer via the pair of electrical microphone conductors, electrically coupled to the data input circuit via the set of electrical data input conductors, and electrically coupled to the electronic display via the set of electrical display conductors, and

a radio housing having the radio circuitry and adapted to be mechanically coupled to the user interface module.

24. A radiotelephone according to claim 23 wherein the user interface module further comprises:

a first earpiece adhesive layer having an outer edge portion bonded to the bottom surface of the membrane sheet layer at a periphery of the earpiece acoustic aperture,

a first earpiece spacing layer having a top surface disposed opposite a bottom surface, the top surface of the first earpiece spacing layer being bonded by the first earpiece adhesive layer to the bottom surface of the membrane sheet layer at the periphery of the earpiece acoustic aperture,

a second earpiece adhesive layer having an outer edge portion bonded to the bottom surface of the first earpiece spacing layer at the periphery of the earpiece acoustic aperture,

an earpiece electroacoustic transducer sheet layer forming the earpiece electroacoustic transducer and having a top surface disposed opposite a bottom surface, the top surface of the earpiece electroacoustic transducer sheet layer being bonded by the second earpiece adhesive layer to the bottom surface of the first earpiece spacing layer at the periphery of the earpiece acoustic aperture, a first earpiece acoustic cavity being formed between the bottom surface of the membrane sheet layer and the top surface of the earpiece electroacoustic transducer sheet layer, the first earpiece acoustic cavity having a depth determined by a thickness of the first earpiece adhesive layer, the first earpiece spacing layer, and the second earpiece adhesive layer, the earpiece electroacoustic transducer sheet layer having a first set of conductive contacts electrically coupled to the pair of electrical earpiece conductors of the plurality of electrical conductors of the flexible circuit sheet layer,

a third earpiece adhesive layer having an outer edge portion bonded to the bottom surface of the earpiece electroacoustic transducer sheet layer at the periphery of the earpiece acoustic aperture,

a second earpiece spacing layer having a top surface disposed opposite a bottom surface, the top surface of the second earpiece spacing layer being bonded by the third earpiece adhesive layer to the bottom surface of the earpiece electroacoustic transducer sheet layer at the periphery of the earpiece acoustic aperture,

a fourth earpiece adhesive layer having an outer edge portion bonded to the bottom surface of the second earpiece spacing layer at the periphery of the earpiece acoustic aperture,

an earpiece back sheet layer having a top surface disposed opposite a bottom surface, the top surface of the earpiece back sheet layer being bonded by the fourth earpiece adhesive layer to the bottom surface of the second earpiece spacing layer at the periphery of the earpiece acoustic aperture, a second earpiece acoustic cavity being formed between the bottom surface of the earpiece electroacoustic transducer sheet layer and the top surface of the earpiece back sheet layer, the second earpiece acoustic cavity having a depth determined by a thickness of the third earpiece adhesive layer, the second earpiece spacing layer, and the fourth earpiece adhesive layer,

a first microphone adhesive layer having an outer edge portion bonded to the bottom surface of the membrane sheet layer at a periphery of the microphone acoustic aperture,

a first microphone spacing layer having a top surface disposed opposite a bottom surface, the top surface of the first microphone spacing layer being bonded by the first microphone adhesive layer to the bottom surface of the membrane sheet layer at the periphery of the microphone acoustic aperture,

a second microphone adhesive layer having an outer edge portion bonded to the bottom surface of the first microphone spacing layer at the periphery of the microphone acoustic aperture,

a microphone electroacoustic transducer sheet layer forming the microphone electroacoustic transducer and having a top surface disposed opposite a bottom surface, the top surface of the microphone electroacoustic transducer sheet layer being bonded by the second microphone adhesive layer to the bottom surface of the first microphone spacing layer at the periphery of the microphone acoustic aperture, a first microphone acoustic cavity being formed between the bottom surface of the membrane sheet layer and the top surface of the microphone electroacoustic transducer sheet layer, the first microphone acoustic cavity having a depth determined by a thickness of the first microphone adhesive layer, the first microphone spacing layer, and the second microphone adhesive layer, the microphone electroacoustic transducer sheet layer having a first set of conductive contacts electrically coupled to the pair of electrical microphone conductors of the plurality of electrical conductors of the flexible circuit sheet layer,

a third microphone adhesive layer having an outer edge portion bonded to the bottom surface of the microphone electroacoustic transducer sheet layer at the periphery of the microphone acoustic aperture,

a second microphone spacing layer having a top surface disposed opposite a bottom surface, the top surface of the second microphone spacing layer being bonded by the third microphone adhesive layer to the bottom surface of the microphone electroacoustic transducer sheet layer at the periphery of the microphone acoustic aperture,

a fourth microphone adhesive layer having an outer edge portion bonded to the bottom surface of the second microphone spacing layer at the periphery of the microphone acoustic aperture, and

an microphone back sheet layer having a top surface disposed opposite a bottom surface, the top surface of the microphone back sheet layer being bonded by the fourth microphone adhesive layer to the bottom surface of the second microphone spacing layer at the periphery of the microphone acoustic aperture, a second microphone acoustic cavity being formed between the bottom surface of the microphone electroacoustic transducer sheet layer and the top surface of the microphone back sheet layer, the second microphone acoustic cavity having a depth determined by a thickness of the third microphone adhesive layer, the second microphone spacing layer, and the fourth microphone adhesive layer.

25. A radiotelephone according to claim 24 wherein the user interface module further includes:

a first hinge mechanism for rotatably coupling a first user interface portion relative to the second user interface portion,

wherein the first user interface portion includes at least one of a first electroacoustic sheet layer forming the earpiece electroacoustic transducer, the electronic display, the data input circuit and a second electroacoustic sheet layer forming the microphone electroacoustic transducer, and

wherein the second user interface portion includes at least one of the first electroacoustic sheet layer forming the earpiece electroacoustic transducer, the electronic display, the data input circuit and the second electroacoustic sheet layer forming the microphone electroacoustic transducer when not included in the first user interface portion.

26. A radiotelephone according to claim 25 wherein the user interface module further includes:

a second hinge mechanism for rotatably coupling a third user interface portion relative to the second user interface portion,

wherein the third user interface portion includes at least one of the first electroacoustic sheet layer forming the earpiece electroacoustic transducer, the electronic display, the data input circuit and the second electroacoustic sheet layer forming the microphone electroacoustic transducer when not included in the first user interface portion or the second user interface portion.

27. A radiotelephone according to claim 23:

wherein the user interface module further includes;

a first connector electrically coupled to the plurality of electrical conductors, and

wherein the radio circuitry module further includes;

a second connector adapted to be connected to the first connector to electrically couple the radio circuitry to the user interface circuitry.

28. A radiotelephone according to claim 23 further comprising:

a power supply module including;

a power supply source electrically coupled to the radio circuitry; and

a power supply housing having the power supply source and adapted to be mechanically coupled to the radio housing.

29. A radiotelephone according to claim 23 wherein the user interface module further includes:

a first hinge mechanism for rotatably coupling a first user interface portion relative to the second user interface portion,

wherein the first user interface portion includes at least one of the earpiece electroacoustic transducer, the electronic display, the data input circuit and the microphone electroacoustic transducer, and

wherein the second user interface portion includes at least one of the earpiece electroacoustic transducer, the electronic display, the data input circuit and the microphone electroacoustic transducer when not included in the first user interface portion.

30. A radiotelephone according to claim 29 wherein the user interface module further includes:

a second hinge mechanism for rotatably coupling a third user interface portion relative to the second user interface portion,

wherein the third user interface portion includes at least one of the earpiece electroacoustic transducer, the electronic display, the data input circuit and the microphone electroacoustic transducer when not included in the first user interface portion or the second user interface portion.