GB434563A - Improvements in and relating to baffles and containers for loud speakers - Google Patents
Improvements in and relating to baffles and containers for loud speakersInfo
- Publication number
- GB434563A GB434563A GB2327834A GB2327834A GB434563A GB 434563 A GB434563 A GB 434563A GB 2327834 A GB2327834 A GB 2327834A GB 2327834 A GB2327834 A GB 2327834A GB 434563 A GB434563 A GB 434563A
- Authority
- GB
- United Kingdom
- Prior art keywords
- box
- layers
- air
- rear wall
- turner
- 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
- 229920000742 Cotton Polymers 0.000 abstract 1
- 239000002250 absorbent Substances 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 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
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
- H04R1/2869—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself
- H04R1/2876—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of damping material, e.g. as cladding
- H04R1/288—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of damping material, e.g. as cladding for loudspeaker transducers
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Building Environments (AREA)
Abstract
434,563. Loud - speakers. TURNER, P. K., 73, Osborne Road, Windsor, Berkshire, and HARTLEY TURNER RADIO, Ltd., Dome Buildings, The Square, Richmond, Surrey. Aug. 13, 1934, No. 23278. [Class 40 (iv)] For preventing interference between the waves from the two sides of a diaphragm of the order of 1 ft. or less in diameter and for eliminating box resonance, the rear of the diaphragm is acoustically enclosed by a series of air-spaced layers of sound-absorbent material, some or all of which have openings. As shown, sheets 42, Fig. 4, of gamgee tissue or cotton wool are clamped between light wooden frames 41 and against a fillet 44 in the box 43 so as to be compressed between adjacent frames and also between each frame and the walls of the box. The layers 15, Fig. 1, are cut away to receive the body of the loudspeaker 11, and to form an air cavity 16 of diameter decreasing progressively towards the rear of the box. The rear wall of the box may be dispensed with, and if the sound waves are absorbed before reaching the margins of the layers, a box is unnecessary. In a modification, Fig. 2 (not shown), the rear wall of the box and the part forming the cavity 16 are dispensed with. As shown in Fig. 3, the box has no rear wall and the layers 35 are cut away to form a number of air cavities 36 around the loudspeaker 31. The thickness of the air spaces and of the layers 15 is of the same order.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2327834A GB434563A (en) | 1934-08-13 | 1934-08-13 | Improvements in and relating to baffles and containers for loud speakers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2327834A GB434563A (en) | 1934-08-13 | 1934-08-13 | Improvements in and relating to baffles and containers for loud speakers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB434563A true GB434563A (en) | 1935-09-04 |
Family
ID=10193076
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2327834A Expired GB434563A (en) | 1934-08-13 | 1934-08-13 | Improvements in and relating to baffles and containers for loud speakers |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB434563A (en) |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2643728A (en) * | 1951-08-15 | 1953-06-30 | William R Anthony | High fidelity loud-speaker cabinet |
DE925653C (en) * | 1937-10-22 | 1955-03-28 | Telefunken Gmbh | Housing for electrodynamic cone loudspeakers with a deeply tuned membrane |
US2866514A (en) * | 1955-04-27 | 1958-12-30 | Weathers Paul | Corrective loud speaker enclosure |
US2917127A (en) * | 1955-02-17 | 1959-12-15 | Pye Ltd | Acoustic enclosure for loudspeakers |
US3132712A (en) * | 1960-01-04 | 1964-05-12 | Wilbur L Maddy | Loud-speaker enclosure |
US3443660A (en) * | 1967-12-14 | 1969-05-13 | Admiral Corp | Mid-range speaker and enclosure combination |
US4284844A (en) * | 1979-05-07 | 1981-08-18 | Belles Research Corp. | Loudspeaker system |
US4509615A (en) * | 1980-02-04 | 1985-04-09 | Hruby John O | Multi-chamber enclosure for loudspeakers |
US4591020A (en) * | 1980-02-04 | 1986-05-27 | Hruby Jr John O | Loudspeaker enclosure with isolation of loudspeaker vibration |
FR2652978A1 (en) * | 1989-10-10 | 1991-04-12 | Kopferschmitt Lucien | Acoustic enclosure |
US5117463A (en) * | 1989-03-14 | 1992-05-26 | Pioneer Electronic Corporation | Speaker system having directivity |
FR2705011A1 (en) * | 1993-05-04 | 1994-11-10 | Kopferschmitt Lucien | Loudspeaker enclosure |
GB2290672A (en) * | 1995-09-08 | 1996-01-03 | B & W Loudspeakers | Loudspeaker systems |
FR2768009A1 (en) * | 1997-05-27 | 1999-03-05 | Bernard Kopferschmitt | Acoustic see through wall block |
-
1934
- 1934-08-13 GB GB2327834A patent/GB434563A/en not_active Expired
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE925653C (en) * | 1937-10-22 | 1955-03-28 | Telefunken Gmbh | Housing for electrodynamic cone loudspeakers with a deeply tuned membrane |
US2643728A (en) * | 1951-08-15 | 1953-06-30 | William R Anthony | High fidelity loud-speaker cabinet |
US2917127A (en) * | 1955-02-17 | 1959-12-15 | Pye Ltd | Acoustic enclosure for loudspeakers |
US2866514A (en) * | 1955-04-27 | 1958-12-30 | Weathers Paul | Corrective loud speaker enclosure |
US3132712A (en) * | 1960-01-04 | 1964-05-12 | Wilbur L Maddy | Loud-speaker enclosure |
US3443660A (en) * | 1967-12-14 | 1969-05-13 | Admiral Corp | Mid-range speaker and enclosure combination |
US4284844A (en) * | 1979-05-07 | 1981-08-18 | Belles Research Corp. | Loudspeaker system |
US4509615A (en) * | 1980-02-04 | 1985-04-09 | Hruby John O | Multi-chamber enclosure for loudspeakers |
US4591020A (en) * | 1980-02-04 | 1986-05-27 | Hruby Jr John O | Loudspeaker enclosure with isolation of loudspeaker vibration |
US5117463A (en) * | 1989-03-14 | 1992-05-26 | Pioneer Electronic Corporation | Speaker system having directivity |
FR2652978A1 (en) * | 1989-10-10 | 1991-04-12 | Kopferschmitt Lucien | Acoustic enclosure |
FR2705011A1 (en) * | 1993-05-04 | 1994-11-10 | Kopferschmitt Lucien | Loudspeaker enclosure |
GB2290672A (en) * | 1995-09-08 | 1996-01-03 | B & W Loudspeakers | Loudspeaker systems |
FR2768009A1 (en) * | 1997-05-27 | 1999-03-05 | Bernard Kopferschmitt | Acoustic see through wall block |
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