SE309609B - - Google Patents
Info
- Publication number
- SE309609B SE309609B SE754961A SE754961A SE309609B SE 309609 B SE309609 B SE 309609B SE 754961 A SE754961 A SE 754961A SE 754961 A SE754961 A SE 754961A SE 309609 B SE309609 B SE 309609B
- Authority
- SE
- Sweden
- Prior art keywords
- diaphragm
- apertures
- resonator
- acoustic
- pipes
- Prior art date
Links
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 238000013016 damping Methods 0.000 abstract 1
- 239000011888 foil Substances 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
- 238000005192 partition Methods 0.000 abstract 1
- 230000001681 protective 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
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/225—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only for telephonic receivers
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Abstract
950,675. Transducers. SIEMENS & HALSKE A.G. July 19, 1961 [July 22, 1960], No. 26230/61. Heading H4J. An electro-acoustic transducer having a diaphragm is provided with a resonator in the form of an acoustic pipe disposed in front of the diaphragm, the pipe having an arcuate axis lying in a plane parallel to the diaphragm. As shown, the invention is applied to a moving- coil transducer having a moving coil 6, operating in a ring-shaped gap 5, mechanically connected to a diaphragm 7. The protective cap 8 has acoustically inactive apertures 9. An absorption resonator 10 is provided behind the diaphragm 7, the partition 11 being thin-walled and having two tubular resonator apertures 12, 13, of negligible acoustic frictional resistance, closed by foils 14, 15 of acoustic damping material. Apertures 16 in the pole plate 4 allow the resonator 10 to be directly coupled to the space behind the diaphragm 7 by the apertures 12, 13, and thus to suppress an undesired resonance point of the transducer. A tube 19 in the freely moving part of the diaphragm 7 couples the space in front of the diaphragm to that behind it, and is so dimensioned as to resonate at the lower frequency end of the frequency range, thus extending the said range. The provision of the two resonant pipes 21, 22 in front of the diaphragm serve to suppress resonant points at the higher frequency end of the range, the lengths of these pipes being chosen so as to be equal to half the wavelengths of the undesired resonant frequencies. In a modification, the pipes are disposed on the front surface of the diaphragm.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES69544A DE1167897B (en) | 1960-07-22 | 1960-07-22 | Arrangement for frequency response improvement for electroacoustic converters |
Publications (1)
Publication Number | Publication Date |
---|---|
SE309609B true SE309609B (en) | 1969-03-31 |
Family
ID=7501053
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE754961A SE309609B (en) | 1960-07-22 | 1961-07-21 |
Country Status (6)
Country | Link |
---|---|
BE (1) | BE606388A (en) |
CH (1) | CH395192A (en) |
DE (1) | DE1167897B (en) |
GB (1) | GB950675A (en) |
NL (1) | NL267294A (en) |
SE (1) | SE309609B (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4843628A (en) * | 1986-07-10 | 1989-06-27 | Stanton Magnetics, Inc. | Inertial microphone/receiver with extended frequency response |
DE3630951A1 (en) * | 1986-09-11 | 1988-03-17 | Siemens Ag | ARRANGEMENT FOR IMPROVING THE FREQUENCY RANGE FOR ELECTROACOUSTIC CONVERTERS |
CN1015289B (en) * | 1988-08-10 | 1992-01-01 | 西门子公司 | Electroacoustic transducer |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE554098C (en) * | 1927-10-04 | 1932-07-04 | Gramophone Co Ltd | Resonator for sound reproduction devices |
NL78163C (en) * | 1950-05-11 | |||
DE1677711U (en) * | 1953-03-24 | 1954-06-10 | Siemens Ag | CARBON MICROPHONE WITH RESONATOR VOICE. |
DE1076182B (en) * | 1957-02-21 | 1960-02-25 | F & H Schumann G M B H | Filter arrangement for electro-acoustic converters |
-
0
- NL NL267294D patent/NL267294A/xx unknown
-
1960
- 1960-07-22 DE DES69544A patent/DE1167897B/en active Pending
-
1961
- 1961-06-23 CH CH735161A patent/CH395192A/en unknown
- 1961-07-19 GB GB2623061A patent/GB950675A/en not_active Expired
- 1961-07-20 BE BE606388A patent/BE606388A/en unknown
- 1961-07-21 SE SE754961A patent/SE309609B/xx unknown
Also Published As
Publication number | Publication date |
---|---|
DE1167897B (en) | 1964-04-16 |
NL267294A (en) | |
GB950675A (en) | 1964-02-26 |
CH395192A (en) | 1965-07-15 |
BE606388A (en) | 1961-11-16 |
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