Audio Transducer Component

• US 20080317255A1
• Filed: 02/25/2005
• Published: 12/25/2008
• Est. Priority Date: 02/25/2005
• Status: Abandoned Application

• Current Assignee: Nokia Corporation
• Original Assignee: Nokia Corporation
• Inventors: Zacharov, Nicholas, Cozens, John
• Application Number:
  US11/885,146
• Publication Number:
  US 20080317255A1
• Time in Patent Office: Days
• US Class Current: 381/71.6
• CPC Class Codes: H04R 1/227 using transducers reproducing the same frequency band
• CPC Class Codes: H04R 1/24 Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges
• CPC Class Codes: H04R 2209/026 Transducers having separately controllable opposing diaphragms, e.g. for ring-tone and voice H04R2400/03 takes precedence
• CPC Class Codes: H04R 2400/01 Transducers used as a loudspeaker to generate sound aswell as a microphone to detect sound
• CPC Class Codes: H04R 2499/11 Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's
• CPC Class Codes: H04R 9/025 Magnetic circuit
• CPC Class Codes: H04R 9/10 Telephone receivers

Abstract

An audio transducer component comprises at least two independent voice coils, each voice coil associated with a diaphragm and an acoustic cavity. The audio transducer component further comprises magnetic means for driving the at least two independent voice coils with independent signals.

Claims

1-20. -20. (canceled)

21. An audio transducer component comprising at least two independent voice coils, each voice coil associated with a diaphragm and an acoustic cavity;

and magnetic means for driving the at least two independent voice coils with independent signals, wherein said acoustic cavities associated with each of the at least two independent voice coils are independent from each other.

22. The audio transducer component according to claim 21, wherein the magnetic means comprises a single magnet.

23. The audio transducer component according to claim 21, wherein the magnetic means comprises at least two magnets.

24. The audio transducer component according to claim 23, wherein a first magnet serves concurrently two independent voice coils and a second magnet serves at least one further independent voice coil.

25. The audio transducer component according to claim 21, wherein the independent signals comprise a signal of at least one of sub-speech frequencies, speech frequencies, narrow band speech, wideband speech and full audible frequency range.

26. The audio transducer component according to claim 25, wherein the independent signals comprise at least one of a stereo signal, a three-dimensional sound signal, a monophonic signal and an active noise control signal.

27. The audio transducer component according to claim 21, wherein the at least two voice coils, together with the associated diaphragms and acoustic cavities, are placed back to back.

28. The audio transducer component according to claim 21, wherein the magnetic means comprises one of an annular, disk and block shaped magnet.

29. The audio transducer component according to claim 21, wherein the magnetic means comprises a linearly polarised magnet.

30. The audio transducer component according to claim 21, wherein the magnetic means comprises a radially polarised magnet.

31. The audio transducer component according to claim 21, further comprising at least one of an independent port for each acoustic cavity for air venting to free air and an independent connecting structure for each acoustic cavity.

32. The audio transducer component according to claim 31, wherein the at least one independent port comprises at least one of a side vent, a front vent and a back vent.

33. The audio transducer component according to claim 21, wherein the at least two voice coils are acoustically isolated from each other.

34. The audio transducer component according to claim 21, wherein one of the at least two voice coils and the associated diaphragm and acoustic cavity are configured to act as a microphone and another of the at least two voice coils and the associated diaphragm and acoustic cavity are configured to act as a speaker.

35. The audio transducer component according to claim 34, wherein the speaker is configured to reproduce an earpiece signal and an active noise controlled signal for noise cancellation.

36. The audio transducer component according to claim 34, further comprising a further independent voice coil associated with a diaphragm and an acoustic cavity, wherein the further voice coil and the associated diaphragm and acoustic cavity are acting as an active noise controlled speaker for noise cancellation.

37. The audio transducer component according to claim 21, wherein at least two of the at least two voice coils and the associated diaphragm and acoustic cavity are each acting as a speaker.

38. An electronic device comprising an audio transducer component according to claim 21.

39. The electronic device according to claim 38, comprising one of an earpiece, a hands-free device, a user equipment, a mobile station, a cellular phone, a game terminal, a remote control, a camcorder, a personal digital assistant, a laptop computer, a sound recorder and a sound player.