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Title:
BENDING WAVE LOUDSPEAKERS
Document Type and Number:
WIPO Patent Application WO/2000/070908
Kind Code:
A2
Abstract:
A loudspeaker comprising a bending-wave panel, an enclosure in which the bending-wave panel is mounted to enclose one face of the panel, a compliant suspension between the panel and the enclosure by which the panel is supported in the enclosure, a vibration exciter attached to the panel to apply bending-wave energy thereto, and an acoustic absorber in the enclosure to reduce standing waves in the enclosure, characterised in that the compliant suspension and the acoustic absorber are integral.

Inventors:
Bank, Graham (8 Fynn Road Martlesham Woodbridge Suffolk IP12 4LS, GB)
Fordham, Julian (26 Orchard Way Offord D'Arcy Huntingdon Cambridgeshire PE19 5RE, GB)
Application Number:
PCT/GB2000/001666
Publication Date:
November 23, 2000
Filing Date:
May 11, 2000
Export Citation:
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Assignee:
NEW TRANSDUCERS LIMITED (37 Ixworth Place London SW3 3QH, GB)
Bank, Graham (8 Fynn Road Martlesham Woodbridge Suffolk IP12 4LS, GB)
Fordham, Julian (26 Orchard Way Offord D'Arcy Huntingdon Cambridgeshire PE19 5RE, GB)
International Classes:
H04R7/04; H04R7/20; H04R23/00; H04R1/28; H04R31/00; (IPC1-7): H04R7/00
Domestic Patent References:
WO2000007409A12000-02-10
WO1997009842A21997-03-13
Foreign References:
FR2549333A11985-01-18
US3720285A1973-03-13
Attorney, Agent or Firm:
Maguire, Boss (5 Crown Street St. Ives Cambridgeshire PE27 5EB, GB)
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Claims:
CLAIMS
1. A loudspeaker comprising a bendingwave panel, an enclosure in which the bendingwave panel is mounted to enclose one face of the panel, a compliant suspension between the panel and the enclosure by which the panel is supported in the enclosure, a vibration exciter attached to the panel to apply bendingwave energy thereto, and an acoustic absorber in the enclosure to reduce standing waves in the enclosure, characterised in that the compliant suspension and the acoustic absorber are integral.
2. A loudspeaker according to claim 1, characterised in that the integral acoustic absorber and compliant suspension are of a soft foam material.
3. A loudspeaker according to claim 2, characterised in that the soft foam material is compressed in a region defining the compliant suspension compared to the region defining the acoustic absorber.
Description:
INTERNATIONAL SEARCH REPORT Inter,... jonal Application No PCT/GB 00/01666 C. (Continuation) DOCUMENTS CONSIDERED TO BE RELEVANT Category"Citafon ot document. wih indication. where appropriate. of the relevant passages Relevant to claim No. A US 3 720 285 A (RUSSELL K ET AL) 1-3 13 March 1973 (1973-03-13) column 1, line 3-column 4, line 11; figures 3 INTERNATIONAL SEARCH REPORT | Intew. ional Application No information on patent tamity members, Patent document Publication Patent family Publication cited in search report date member (s) date WO 0007409 A 10-02-2000 AU 5049199 A 21-02-2000 WO 9709842 A 13-03-1997 AT 177579 T 15-03-1999 AT 177574 T 15-03-1999 AT 177580 T 15-03-1999 AT 177575 T 15-03-1999 AT 186617 T 15-11-1999 AT 177581 T 15-03-1999 AT 177582 T 15-03-1999 AT 177583 T 15-03-1999 AT 177578 T 15-03-1999 AT 177576 T 15-03-1999 AT 179297 T 15-05-1999 AT 177577 T 15-03-1999 AT 179563 T 15-05-1999 AT 176826 T 15-03-1999 AT 179045 T 15-04-1999 AT 179296 T 15-05-1999 AT 177281 T 15-03-1999 AT 179564 T 15-05-1999 AT 177282 T 15-03-1999 AT 179043 T 15-04-1999 AT 179044 T 15-04-1999 AU 702865 B 11-03-1999 AU 6880196 A 27-03-1997 AU 702920 B 11-03-1999 AU 6880296 A 27-03-1997 AU 702867 B 11-03-1999 AU 6880396 A 27-03-1997 AU 703015 B 11-03-1999 AU 6880496 A 27-03-1997 AU 702863 B 11-03-1999 AU 6880596 A 27-03-1997 AU 702873 B 11-03-1999 AU 6880696 A 27-03-1997 AU 702999 B 11-03-1999 AU 6880796 A 27-03-1997 AU 703061 B 11-03-1999 AU 6880896 A 27-03-1997 AU 703000 B 11-03-1999 AU 6880996 A 27-03-1997 AU 703071 B 11-03-1999 AU 6881096 A 27-03-1997 AU 703058 B 11-03-1999 AU 6881296 A 27-03-1997 AU 705592 B 27-05-1999 AU 6881396 A 27-03-1997 AU 703296 B 25-03-1999 AU 6881496 A 27-03-1997 AU 699890 B 17-12-1998 AU 6881596 A 27-03-1997 AU 703198 B 18-03-1999 FR 2549333 A 18-01-1985 NONE US 3720285 A 13-03-1973 NONE