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NZ741473B2 - Improvements in or relating to audio transducers - Google Patents
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NZ741473B2 - Improvements in or relating to audio transducers - Google Patents

Improvements in or relating to audio transducers Download PDF

Info

Publication number
NZ741473B2
NZ741473B2 NZ741473A NZ74147316A NZ741473B2 NZ 741473 B2 NZ741473 B2 NZ 741473B2 NZ 741473 A NZ741473 A NZ 741473A NZ 74147316 A NZ74147316 A NZ 74147316A NZ 741473 B2 NZ741473 B2 NZ 741473B2
Authority
NZ
New Zealand
Prior art keywords
audio device
diaphragm
base structure
transducer
audio
Prior art date
Application number
NZ741473A
Other versions
NZ741473A (en
Inventor
David Palmer
Michael Palmer
Original Assignee
Wing Acoustics Limited
Filing date
Publication date
Application filed by Wing Acoustics Limited filed Critical Wing Acoustics Limited
Priority claimed from PCT/IB2016/055472 external-priority patent/WO2017046716A1/en
Publication of NZ741473A publication Critical patent/NZ741473A/en
Publication of NZ741473B2 publication Critical patent/NZ741473B2/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1008—Earpieces of the supra-aural or circum-aural type
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1058—Manufacture or assembly
    • H04R1/1075—Mountings of transducers in earphones or headphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R15/00—Magnetostrictive transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R19/00—Electrostatic transducers
    • H04R19/01—Electrostatic transducers characterised by the use of electrets
    • H04R19/013—Electrostatic transducers characterised by the use of electrets for loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
    • H04R2307/023—Diaphragms comprising ceramic-like materials, e.g. pure ceramic, glass, boride, nitride, carbide, mica and carbon materials
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
    • H04R2307/027—Diaphragms comprising metallic materials
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/24—Tensioning by means acting directly on free portions of diaphragm or cone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers

Abstract

The invention relates to audio devices, such as loudspeaker, microphones and the like, and includes improvements in or relating thereto. Embodiments of the invention include audio devices comprising at least one audio transducer having: a transducer base structure, a diaphragm assembly, a transducing mechanism operatively coupled to the diaphragm, and one or more surrounds extending adjacent to and about an outer periphery of the diaphragm. The outer periphery of the diaphragm comprises one or more peripheral regions that are free from physical connection with the surround(s). The audio device further comprises at least one decoupling mounting system compliantly mounting one of the audio transducer(s) to at least one other part of the audio device. In such embodiments, subjective sound quality of the audio device may be improved.

Claims (33)

1. An audio device comprising: at least one audio transducer having: 5 a transducer base structure; a diaphragm assembly comprising a diaphragm moveably coupled to the transducer base structure to oscillate during operation; and a transducing mechanism operatively coupled to the diaphragm; one or more surrounds extending adjacent to and about an outer 10 periphery of the diaphragm, and wherein the outer periphery of the diaphragm comprises one or more peripheral regions that are free from physical connection with the surround(s); and at least one decoupling mounting system, each decoupling mounting system compliantly mounting one of the audio transducer(s) to at least one other part of the 15 audio device, wherein the decoupling mounting system is mounted to the transducer base structure of the associated audio transducer and the other part of the audio device is not part of a diaphragm assembly of an audio transducer of the audio device.
2. An audio device as claimed in claim 1 further comprising at least one housing, 20 each housing accommodating at least one of the audio transducer(s).
3. An audio device as claimed in claim 2 wherein at least one of the decoupling mounting system(s) compliantly mounts the transducer base structure of the associated audio transducer to the associated housing to at least partially 25 alleviate mechanical transmission of vibration between the transducer base structure and the housing during operation.
4. An audio device as claimed in either one of claim 2 or claim 3 wherein each housing is a baffle or enclosure.
5. An audio device as claimed in any one of claim 2 to claim 4 wherein at least one of the surround(s) forms part of at least one of housing(s).
6. An audio device as claimed in any one of claim 2 to claim 5 wherein at least 35 one of the surround(s) is separate to the housing(s).
7. An audio device as claimed in any one of the preceding claims wherein the outer periphery of the diaphragm is significantly free from physical connection such that the one or more peripheral regions constitute at least 20% of a perimeter of the outer periphery.
8. An audio device as claimed in any one of the preceding claims wherein the outer 5 periphery of the diaphragm is free from physical connection such that the one or more peripheral regions constitute at least 50% of a perimeter of the outer periphery.
9. An audio device as claimed in claim 8 wherein the one or more peripheral regions 10 constitute at least 80% of the periphery of the outer periphery.
10. An audio device as claimed in any one of the preceding claims wherein the outer periphery of the diaphragm is entirely free from physical connection with the associated surround(s).
11. An audio device as claimed in any one of the preceding claims wherein the one or more peripheral regions of the diaphragm are separated from the associated surround(s) by an air gap. 20
12. An audio device as claimed in any one of claim 1 to claim 11 further comprising ferromagnetic fluid located between the one or more peripheral regions of the diaphragm and the associated surround(s).
13. An audio device as claimed in any one of the preceding claims wherein the 25 diaphragm oscillates along a principal path of motion during operation and the associated decoupling mounting system enables movement of the diaphragm assembly relative to the other part of the audio device along a path or paths other than the principal path of motion. 30
14. An audio device as claimed in any one of the preceding claims wherein each decoupling mounting system permits translational movement of the associated transducer base structure relative to the other part of the audio device.
15. An audio device as claimed in claim 14 wherein each decoupling mounting 35 system permits translational movement of the associated transducer base structure relative to the other part of the audio device along at least two translational axis.
16. An audio device as claimed in claim 15 wherein each decoupling mounting system permits translational movement of the associated transducer base structure relative to the other part of the audio device along three orthogonal 5 axes.
17. An audio device as claimed in any one of the preceding claims wherein each decoupling mounting system permits rotation of the associated transducer base structure relative to the other part of the audio device about at least one 10 rotational axis.
18. An audio device as claimed in any one of the preceding claims wherein each decoupling mounting system permits rotation of the associated transducer base structure relative to the other part of the audio device about three, orthogonal 15 rotational axes.
19. An audio device as claimed in any one of the preceding claims wherein each decoupling mounting system permits rotation of the associated transducer base structure relative to the other part of the audio device about a rotational axis 20 that coincides with a node axis of the audio transducer, the node axis being an axis about which the transducer base structure would rotate during diaphragm oscillation, when unconstrained, due to reaction and/or resonance forces.
20. An audio device as claimed in any one of the preceding claims wherein the 25 diaphragm assembly of at least one of the audio transducer(s) is hinged to the transducer base structure such that the diaphragm rotatably oscillates relative to the transducer base structure about an axis of rotation during operation.
21. An audio device as claimed in claim 20 wherein each decoupling mounting 30 system permits rotation of the associated transducer base structure relative to the other part of the audio device about an axis of rotation that is parallel to the axis of rotation of the associated diaphragm.
22. An audio device as claimed in claim 20 or claim 21 wherein the diaphragm 35 assembly is hinged relative to the transducer base structure via a hinge having rigid hinging elements.
23. An audio device as claimed in claim 20 or claim 21 wherein the diaphragm assembly is hinged relative to the transducer base structure via a hinge having flexible hinge elements. 5
24. An audio device as claimed in any one of the preceding claims wherein the transducing mechanism of at least one of the audio transducer(s) is an electromagnetic mechanism having an electrically conductive coil and a magnet or magnetic assembly. 10
25. An audio device as claimed in claim 24 wherein the diaphragm assembly comprises the electrically conductive coil which is coupled to the associated diaphragm, and the magnet or magnetic assembly is coupled to or forms part of the associated transducer base structure. 15
26. An audio device as claimed in claim 24 or claim 25 wherein the electrically conductive coil is closely associated with the axis of rotation of the associated diaphragm.
27. An audio device as claimed in any one of the preceding claims wherein the 20 diaphragm of at least one of the audio transducer(s) is rigid and remains rigid during operation.
28. An audio device as claimed in any one of the preceding claims wherein a maximum thickness or a maximum depth of the diaphragm of at least one of 25 the audio transducer(s) is greater than 11% of a maximum length or maximum dimension of the diaphragm.
29. An audio device as claimed in claim 28 wherein the maximum length or the maximum dimension is a diagonal length or a diameter of the diaphragm.
30. An audio device as claimed in claim 28 or claim 29 wherein the diaphragm is coupled to a force transferring component of the transducing mechanism and the maximum thickness or maximum depth of the diaphragm excludes the force transferring component.
31. An audio device as claimed in any one of the preceding claims wherein the transducer base structure comprises a substantially thick body.
32. An audio device as claimed in any one of the preceding claims wherein the transducing mechanism is operatively coupled to the associated transducer base structure.
33. An audio device as claimed in any one of the preceding claims wherein at least one of the decoupling mounting system(s) compliantly mounts the transducer base structure to the other part of the audio device via one or more flexible members.
NZ741473A 2016-09-14 Improvements in or relating to audio transducers NZ741473B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NZ71225515 2015-09-14
NZ71225615 2015-09-14
PCT/IB2016/055472 WO2017046716A1 (en) 2015-09-14 2016-09-14 Improvements in or relating to audio transducers

Publications (2)

Publication Number Publication Date
NZ741473A NZ741473A (en) 2024-07-05
NZ741473B2 true NZ741473B2 (en) 2024-10-08

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