GB319408A - Improvements in or relating to sound reproducing devices - Google Patents
Improvements in or relating to sound reproducing devicesInfo
- Publication number
- GB319408A GB319408A GB1829228A GB1829228A GB319408A GB 319408 A GB319408 A GB 319408A GB 1829228 A GB1829228 A GB 1829228A GB 1829228 A GB1829228 A GB 1829228A GB 319408 A GB319408 A GB 319408A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diaphragm
- cabinet
- chamber
- resonance
- horn
- 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
- 239000004744 fabric 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
- H04R1/30—Combinations of transducers with horns, e.g. with mechanical matching means, i.e. front-loaded horns
-
- 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
- H04R1/2838—Enclosures comprising vibrating or resonating arrangements of the bandpass type
- H04R1/2842—Enclosures comprising vibrating or resonating arrangements of the bandpass type for loudspeaker transducers
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Abstract
319,408. Gramophone Co., Ltd., (Victor Talking Machine Co.). June 23, 1928. Loud-speakers. - An inertia-controlled diaphragm is provided on both sides with a resonance-chamber, one being in the form of a short horn and the other being constituted by the cabinet in which the diaphragm is mounted. The cross-sectional area of the resonance-chamber in planes perpendicular to the direction of vibration of the diaphragm, and the outlet areas, are at least as great as the projected area of the diaphragm. The two chambers are preferably resonant at different frequencies, the higher of the two resonances being more heavily damped than the lower. The conical diaphragm 1 of a moving-coil loud-speaker is resiliently mounted on an annulus 3 of rubber &c., the magnet system 5 being supported on a cross-bar 11 mounted in a cabinet 8. A horn-shaped baffle 6 extends from the periphery of the diaphragm to a larger aperture in the front panel 9 of the cabinet, while an aperture greater than the projected area of the diaphragm is formed in the back panel 10, and is covered with sound transmitting fabric. Alternatively vents for the rear resonance chamber are formed in the other walls, 7, of the cabinet. In a further modification, Fig. 4, the diaphragm faces the back of the cabinet and a folded two branched horn 13, 14 opens in a single mouth in the front panel 9 of the cabinet, which is provided with vents 12 for the second resonance chamber. Specification 288,276 is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1829228A GB319408A (en) | 1928-06-23 | 1928-06-23 | Improvements in or relating to sound reproducing devices |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1829228A GB319408A (en) | 1928-06-23 | 1928-06-23 | Improvements in or relating to sound reproducing devices |
Publications (1)
Publication Number | Publication Date |
---|---|
GB319408A true GB319408A (en) | 1929-09-23 |
Family
ID=10109953
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1829228A Expired GB319408A (en) | 1928-06-23 | 1928-06-23 | Improvements in or relating to sound reproducing devices |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB319408A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2900040A (en) * | 1955-09-12 | 1959-08-18 | Muter Company | Loudspeaker system |
US3129782A (en) * | 1961-05-04 | 1964-04-21 | James Willis Hughes | Public address apparatus |
US3129783A (en) * | 1960-10-26 | 1964-04-21 | James W Hughes | Housing and mount for loud speakers |
-
1928
- 1928-06-23 GB GB1829228A patent/GB319408A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2900040A (en) * | 1955-09-12 | 1959-08-18 | Muter Company | Loudspeaker system |
US3129783A (en) * | 1960-10-26 | 1964-04-21 | James W Hughes | Housing and mount for loud speakers |
US3129782A (en) * | 1961-05-04 | 1964-04-21 | James Willis Hughes | Public address apparatus |
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