GB819146A - Improvements in or relating to acoustic impedance devices - Google Patents
Improvements in or relating to acoustic impedance devicesInfo
- Publication number
- GB819146A GB819146A GB3603156A GB3603156A GB819146A GB 819146 A GB819146 A GB 819146A GB 3603156 A GB3603156 A GB 3603156A GB 3603156 A GB3603156 A GB 3603156A GB 819146 A GB819146 A GB 819146A
- Authority
- GB
- United Kingdom
- Prior art keywords
- holes
- slots
- areas
- diaphragm
- array
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000463 material Substances 0.000 abstract 2
- 239000002184 metal Substances 0.000 abstract 2
- DOSMHBDKKKMIEF-UHFFFAOYSA-N 2-[3-(diethylamino)-6-diethylazaniumylidenexanthen-9-yl]-5-[3-[3-[4-(1-methylindol-3-yl)-2,5-dioxopyrrol-3-yl]indol-1-yl]propylsulfamoyl]benzenesulfonate Chemical compound C1=CC(=[N+](CC)CC)C=C2OC3=CC(N(CC)CC)=CC=C3C(C=3C(=CC(=CC=3)S(=O)(=O)NCCCN3C4=CC=CC=C4C(C=4C(NC(=O)C=4C=4C5=CC=CC=C5N(C)C=4)=O)=C3)S([O-])(=O)=O)=C21 DOSMHBDKKKMIEF-UHFFFAOYSA-N 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 230000035515 penetration Effects 0.000 abstract 1
- 238000005475 siliconizing Methods 0.000 abstract 1
- 239000011343 solid material Substances 0.000 abstract 1
- 239000004753 textile Substances 0.000 abstract 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
- 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
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
819,146. Perforating sheet materials. STANDARD TELEPHONES & CABLES Ltd. Nov. 26, 1956, No. 36031/56. Class 31 (2). [Also in Groups XXII and XL (b)] A process for producing acoustic impedance material consists in piercing solid material 2 to produce an array of closely-spaced very small holes or slots, Fig. 3, of controlled dimensions by means of a corresponding array of coplanar needle points or chisel edges up to a predetermined cross-sectional area of their taper. The holes or slots are pierced in one or more areas B, Figs. 1 and 2, of reduced thickness in a diaphragm 2 formed within a rim 1 by an array of needles 8, Fig. 9, which have round or square points, or chisel edges and are sweated together in a holder 9; the depth of penetration of the needles may be adjusted by a vernier-controlled punch to provide a measure of the size of the holes or slots. The areas B may be moulded, swaged or die-cast in one or both sides of the metal or plastic diaphragm, or the diaphragm may have clear holes and the areas of reduced thickness provided by a thin sheet of metal, paper, plastic or closely-woven textile, which may be treated by varnishing, styrenating, siliconizing or the like, adhered to its surface.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE562680D BE562680A (en) | 1956-11-26 | ||
| GB3603156A GB819146A (en) | 1956-11-26 | 1956-11-26 | Improvements in or relating to acoustic impedance devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3603156A GB819146A (en) | 1956-11-26 | 1956-11-26 | Improvements in or relating to acoustic impedance devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB819146A true GB819146A (en) | 1959-08-26 |
Family
ID=10384198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3603156A Expired GB819146A (en) | 1956-11-26 | 1956-11-26 | Improvements in or relating to acoustic impedance devices |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE562680A (en) |
| GB (1) | GB819146A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0035220A1 (en) * | 1980-02-29 | 1981-09-09 | Siemens Aktiengesellschaft | Electro-acoustic transducer |
| EP0081780A1 (en) * | 1981-12-10 | 1983-06-22 | International Standard Electric Corporation | Electrodynamic transducer |
| FR2542550A1 (en) * | 1983-03-07 | 1984-09-14 | Thomson Csf | Electroacoustic transducer with integrated acoustic correction |
| EP0232096A2 (en) * | 1986-01-23 | 1987-08-12 | Siemens Plessey Electronic Systems Limited | Acoustic transducers |
| GB2324262A (en) * | 1997-04-11 | 1998-10-21 | Bpb Plc | A punch for perforating a cementitious tile |
-
0
- BE BE562680D patent/BE562680A/xx unknown
-
1956
- 1956-11-26 GB GB3603156A patent/GB819146A/en not_active Expired
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0035220A1 (en) * | 1980-02-29 | 1981-09-09 | Siemens Aktiengesellschaft | Electro-acoustic transducer |
| EP0081780A1 (en) * | 1981-12-10 | 1983-06-22 | International Standard Electric Corporation | Electrodynamic transducer |
| FR2542550A1 (en) * | 1983-03-07 | 1984-09-14 | Thomson Csf | Electroacoustic transducer with integrated acoustic correction |
| EP0232096A2 (en) * | 1986-01-23 | 1987-08-12 | Siemens Plessey Electronic Systems Limited | Acoustic transducers |
| EP0232096A3 (en) * | 1986-01-23 | 1988-10-05 | Plessey Overseas Limited | Acoustic transducers |
| GB2324262A (en) * | 1997-04-11 | 1998-10-21 | Bpb Plc | A punch for perforating a cementitious tile |
| GB2324262B (en) * | 1997-04-11 | 2001-02-07 | Bpb Plc | Cementitious tile |
Also Published As
| Publication number | Publication date |
|---|---|
| BE562680A (en) |
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