FR2274194A1 - Distortion and intermodulation correction for loudspeaker - sound absorbing material in domed cavities in cone - Google Patents
Distortion and intermodulation correction for loudspeaker - sound absorbing material in domed cavities in coneInfo
- Publication number
- FR2274194A1 FR2274194A1 FR7420624A FR7420624A FR2274194A1 FR 2274194 A1 FR2274194 A1 FR 2274194A1 FR 7420624 A FR7420624 A FR 7420624A FR 7420624 A FR7420624 A FR 7420624A FR 2274194 A1 FR2274194 A1 FR 2274194A1
- Authority
- FR
- France
- Prior art keywords
- cone
- loudspeaker
- distortion
- sound absorbing
- absorbing material
- 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.)
- Granted
Links
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
-
- 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
- H04R7/26—Damping by means acting directly on free portion of diaphragm or cone
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
An electrodynamic loudspeaker has the conical shaped vibrating membrane (1) of the low frequency loudspeaker attached to a coil former (2) on which the coil (3) is wound. The membrane is suspended flexibly at its outer extremity by a ring (7) of flexible material attached by its periphery to the rigid frame (8). The inner extremity is supported and centralised by a readily deformable bellows (9). Two dome shaped partitions (13, 14) are fixed in the cone to form two truncated cone shaped cavities which are filled with low density sound absorbing material such as glass wool to correct for distortion and intermodulation by attenuating transverse vibrations and deformations of the membrane.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7420624A FR2274194A1 (en) | 1974-06-07 | 1974-06-07 | Distortion and intermodulation correction for loudspeaker - sound absorbing material in domed cavities in cone |
MC1132A MC1049A1 (en) | 1974-06-07 | 1974-12-04 | Electro-dynamic speakers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7420624A FR2274194A1 (en) | 1974-06-07 | 1974-06-07 | Distortion and intermodulation correction for loudspeaker - sound absorbing material in domed cavities in cone |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2274194A1 true FR2274194A1 (en) | 1976-01-02 |
FR2274194B1 FR2274194B1 (en) | 1977-10-07 |
Family
ID=9140036
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7420624A Granted FR2274194A1 (en) | 1974-06-07 | 1974-06-07 | Distortion and intermodulation correction for loudspeaker - sound absorbing material in domed cavities in cone |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR2274194A1 (en) |
MC (1) | MC1049A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4122314A (en) * | 1976-12-23 | 1978-10-24 | Sony Corporation | Loudspeaker having a laminate diaphragm of three layers |
FR2500705A1 (en) * | 1981-02-25 | 1982-08-27 | Leybold Heraeus Sogev | Low frequency generator for waves on liquid surface - uses capillary tube connected to sealed chamber of predetermined volume formed by loudspeaker cone |
EP0072206A1 (en) * | 1981-08-07 | 1983-02-16 | John Strohbeen | Loudspeaker system for producing coherent sound |
FR2583605A1 (en) * | 1985-06-14 | 1986-12-19 | Zamora Castro | Loudspeaker with two magnets and diaphragm with central suspension |
-
1974
- 1974-06-07 FR FR7420624A patent/FR2274194A1/en active Granted
- 1974-12-04 MC MC1132A patent/MC1049A1/en unknown
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4122314A (en) * | 1976-12-23 | 1978-10-24 | Sony Corporation | Loudspeaker having a laminate diaphragm of three layers |
FR2500705A1 (en) * | 1981-02-25 | 1982-08-27 | Leybold Heraeus Sogev | Low frequency generator for waves on liquid surface - uses capillary tube connected to sealed chamber of predetermined volume formed by loudspeaker cone |
EP0072206A1 (en) * | 1981-08-07 | 1983-02-16 | John Strohbeen | Loudspeaker system for producing coherent sound |
US4440259A (en) * | 1981-08-07 | 1984-04-03 | John Strohbeen | Loudspeaker system for producing coherent sound |
FR2583605A1 (en) * | 1985-06-14 | 1986-12-19 | Zamora Castro | Loudspeaker with two magnets and diaphragm with central suspension |
Also Published As
Publication number | Publication date |
---|---|
MC1049A1 (en) | 1975-10-10 |
FR2274194B1 (en) | 1977-10-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |