GB290344A - Improvements in or relating to sound reproducing apparatus - Google Patents
Improvements in or relating to sound reproducing apparatusInfo
- Publication number
- GB290344A GB290344A GB372727A GB372727A GB290344A GB 290344 A GB290344 A GB 290344A GB 372727 A GB372727 A GB 372727A GB 372727 A GB372727 A GB 372727A GB 290344 A GB290344 A GB 290344A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diaphragm
- periphery
- centre
- horn
- conical
- 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
- 244000286663 Ficus elastica Species 0.000 abstract 1
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 abstract 1
- 229920001971 elastomer Polymers 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 229920001195 polyisoprene Polymers 0.000 abstract 1
- 230000000644 propagated effect Effects 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
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
- H04R1/345—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for loudspeakers
-
- 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
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
290,344. La Bourdonnais, Prince de Mahe, C. M. de C. de. Feb. 9, 1927. Diaphragms; loud-speakers. - A large conical diaphragm d is attached at its centre directly to the movement as shown in Fig. 1, and is supported peripherally from a rigid ring c by three equidistant lugs f, Fig. 3, formed by cutting away the intervening portions of the material forming the diaphragm. In this way it is stated that a substantial portion of the diaphragm vibrates by " piston " action whilst the remainder vibrates by flexure from the periphery. The conical diaphragm is mounted as a whole inside a shallow horn b of circular or polygonal form so as to leave an annular space, e. Sound waves are accordingly propagated from both sides of the diaphragm. The pitch of the sounds is controlled by moving the cone d relatively to the horn b, the arrangement being such that sound waves from the core do not impinge at right angles to the reflecting surfaces of the horn. The diaphragm may be built up from a plurality of conical laminae so that its thickness increases from periphery to centre; or it may be so impregnated as to acquire a graded elasticity from periphery to centre. In such cases the diaphragm may be supported around the entire periphery so as to vibrate partly by piston action and partly by flexure. The diaphragm may be made of onozote, a rubber composition described in Specification 162,176, [Class 70, Indiarubber &c.], the thickness of the diaphragm increasing from periphery to centre.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB372727A GB290344A (en) | 1927-02-09 | 1927-02-09 | Improvements in or relating to sound reproducing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB372727A GB290344A (en) | 1927-02-09 | 1927-02-09 | Improvements in or relating to sound reproducing apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB290344A true GB290344A (en) | 1928-05-09 |
Family
ID=9763800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB372727A Expired GB290344A (en) | 1927-02-09 | 1927-02-09 | Improvements in or relating to sound reproducing apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB290344A (en) |
-
1927
- 1927-02-09 GB GB372727A patent/GB290344A/en not_active Expired
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