ZA200102755B - Acoustic device according to bending wave principle. - Google Patents
Acoustic device according to bending wave principle. Download PDFInfo
- Publication number
- ZA200102755B ZA200102755B ZA200102755A ZA200102755A ZA200102755B ZA 200102755 B ZA200102755 B ZA 200102755B ZA 200102755 A ZA200102755 A ZA 200102755A ZA 200102755 A ZA200102755 A ZA 200102755A ZA 200102755 B ZA200102755 B ZA 200102755B
- Authority
- ZA
- South Africa
- Prior art keywords
- acoustic device
- shell
- modes
- transducer
- coupled
- Prior art date
Links
- 238000005452 bending Methods 0.000 title claims abstract description 30
- 230000008878 coupling Effects 0.000 claims abstract description 20
- 238000010168 coupling process Methods 0.000 claims abstract description 20
- 238000005859 coupling reaction Methods 0.000 claims abstract description 20
- 239000003570 air Substances 0.000 claims description 27
- 230000005404 monopole Effects 0.000 claims description 7
- 239000012080 ambient air Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 230000004044 response Effects 0.000 description 24
- 230000000694 effects Effects 0.000 description 10
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- 230000005284 excitation Effects 0.000 description 5
- 238000013459 approach Methods 0.000 description 4
- 230000008602 contraction Effects 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- ZPUCINDJVBIVPJ-LJISPDSOSA-N cocaine Chemical compound O([C@H]1C[C@@H]2CC[C@@H](N2C)[C@H]1C(=O)OC)C(=O)C1=CC=CC=C1 ZPUCINDJVBIVPJ-LJISPDSOSA-N 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/12—Non-planar diaphragms or cones
- H04R7/122—Non-planar diaphragms or cones comprising a plurality of sections or layers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/227—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only using transducers reproducing the same frequency band
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
- H04R1/2807—Enclosures comprising vibrating or resonating arrangements
- H04R1/2815—Enclosures comprising vibrating or resonating arrangements of the bass reflex type
- H04R1/2819—Enclosures comprising vibrating or resonating arrangements of the bass reflex type for loudspeaker transducers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; 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
- H04R7/045—Plane diaphragms using the distributed mode principle, i.e. whereby the acoustic radiation is emanated from uniformly distributed free bending wave vibration induced in a stiff panel and not from pistonic motion
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; 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
- H04R7/06—Plane diaphragms comprising a plurality of sections or layers
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Golf Clubs (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB9824256.3A GB9824256D0 (en) | 1998-11-06 | 1998-11-06 | Acoustic devices etc. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ZA200102755B true ZA200102755B (en) | 2001-10-08 |
Family
ID=10841891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ZA200102755A ZA200102755B (en) | 1998-11-06 | 2001-04-04 | Acoustic device according to bending wave principle. |
Country Status (17)
| Country | Link |
|---|---|
| EP (1) | EP1125473B1 (fr) |
| JP (1) | JP2002530032A (fr) |
| KR (1) | KR20010080941A (fr) |
| CN (1) | CN1135058C (fr) |
| AT (1) | ATE237211T1 (fr) |
| AU (1) | AU745969B2 (fr) |
| BR (1) | BR9915114A (fr) |
| CA (1) | CA2349861A1 (fr) |
| DE (1) | DE69906775T2 (fr) |
| ES (1) | ES2197682T3 (fr) |
| GB (1) | GB9824256D0 (fr) |
| HK (1) | HK1035988A1 (fr) |
| IL (1) | IL142429A0 (fr) |
| NZ (1) | NZ510971A (fr) |
| TW (1) | TW462202B (fr) |
| WO (1) | WO2000028781A1 (fr) |
| ZA (1) | ZA200102755B (fr) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2370939A (en) * | 2001-01-04 | 2002-07-10 | New Transducers Ltd | A curved or cylindrical bending wave loudspeaker panel |
| BR0208686A (pt) * | 2001-04-05 | 2004-03-30 | New Transducers Ltd | Alto-falante |
| US7245729B2 (en) | 2001-04-05 | 2007-07-17 | New Transducers Limited | Loudspeaker |
| US6813362B2 (en) | 2001-04-05 | 2004-11-02 | New Transducers Limited | Loudspeaker and method of making same |
| JP2006121360A (ja) * | 2004-10-21 | 2006-05-11 | Authentic Ltd | パネル型スピーカ |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5119431A (en) * | 1987-12-28 | 1992-06-02 | Hamby William H | Efficiency loudspeaker |
| US4989254A (en) * | 1989-06-30 | 1991-01-29 | Amalaha Leonard D | Electro-acoustic transducer and manufacturing process |
| UA51671C2 (uk) * | 1995-09-02 | 2002-12-16 | Нью Транзд'Юсез Лімітед | Акустичний пристрій |
| GB9705981D0 (en) * | 1997-03-22 | 1997-05-07 | New Transducers Ltd | Personal computers |
| GB9705979D0 (en) * | 1997-03-22 | 1997-05-07 | New Transducers Ltd | Passenger vehicles |
| BR9807064A (pt) * | 1997-01-09 | 2000-05-02 | New Transducers Ltd | Alto-falantes |
-
1998
- 1998-11-06 GB GBGB9824256.3A patent/GB9824256D0/en not_active Ceased
-
1999
- 1999-11-05 CN CNB998128228A patent/CN1135058C/zh not_active Expired - Fee Related
- 1999-11-05 EP EP99952703A patent/EP1125473B1/fr not_active Expired - Lifetime
- 1999-11-05 WO PCT/GB1999/003656 patent/WO2000028781A1/fr not_active Application Discontinuation
- 1999-11-05 CA CA002349861A patent/CA2349861A1/fr not_active Abandoned
- 1999-11-05 IL IL14242999A patent/IL142429A0/xx unknown
- 1999-11-05 DE DE69906775T patent/DE69906775T2/de not_active Expired - Fee Related
- 1999-11-05 JP JP2000581852A patent/JP2002530032A/ja active Pending
- 1999-11-05 BR BR9915114-6A patent/BR9915114A/pt not_active IP Right Cessation
- 1999-11-05 AU AU64813/99A patent/AU745969B2/en not_active Ceased
- 1999-11-05 NZ NZ510971A patent/NZ510971A/en unknown
- 1999-11-05 ES ES99952703T patent/ES2197682T3/es not_active Expired - Lifetime
- 1999-11-05 AT AT99952703T patent/ATE237211T1/de not_active IP Right Cessation
- 1999-11-05 KR KR1020017005652A patent/KR20010080941A/ko not_active Application Discontinuation
- 1999-11-11 TW TW088119786A patent/TW462202B/zh not_active IP Right Cessation
-
2001
- 2001-04-04 ZA ZA200102755A patent/ZA200102755B/en unknown
- 2001-09-15 HK HK01106542A patent/HK1035988A1/xx not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| WO2000028781A1 (fr) | 2000-05-18 |
| CA2349861A1 (fr) | 2000-05-18 |
| AU745969B2 (en) | 2002-04-11 |
| IL142429A0 (en) | 2002-03-10 |
| GB9824256D0 (en) | 1998-12-30 |
| NZ510971A (en) | 2002-03-01 |
| AU6481399A (en) | 2000-05-29 |
| ATE237211T1 (de) | 2003-04-15 |
| JP2002530032A (ja) | 2002-09-10 |
| EP1125473A1 (fr) | 2001-08-22 |
| CN1325606A (zh) | 2001-12-05 |
| DE69906775T2 (de) | 2004-01-29 |
| DE69906775D1 (de) | 2003-05-15 |
| BR9915114A (pt) | 2001-07-31 |
| CN1135058C (zh) | 2004-01-14 |
| ES2197682T3 (es) | 2004-01-01 |
| EP1125473B1 (fr) | 2003-04-09 |
| HK1035988A1 (en) | 2001-12-14 |
| KR20010080941A (ko) | 2001-08-25 |
| TW462202B (en) | 2001-11-01 |
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