ZA74410B - Improvements in or relating to electroacoustic transducers - Google Patents
Improvements in or relating to electroacoustic transducersInfo
- Publication number
- ZA74410B ZA74410B ZA740410A ZA74410A ZA74410B ZA 74410 B ZA74410 B ZA 74410B ZA 740410 A ZA740410 A ZA 740410A ZA 74410 A ZA74410 A ZA 74410A ZA 74410 B ZA74410 B ZA 74410B
- Authority
- ZA
- South Africa
- Prior art keywords
- relating
- electroacoustic transducers
- electroacoustic
- transducers
- Prior art date
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
- H04R11/00—Transducers of moving-armature or moving-core type
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1454573A GB1385161A (en) | 1973-03-27 | 1973-03-27 | Electro-acoustic transducers |
Publications (1)
Publication Number | Publication Date |
---|---|
ZA74410B true ZA74410B (en) | 1974-11-27 |
Family
ID=10043157
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ZA740410A ZA74410B (en) | 1973-03-27 | 1974-01-21 | Improvements in or relating to electroacoustic transducers |
Country Status (7)
Country | Link |
---|---|
US (1) | US3919500A (en) |
AU (1) | AU6687974A (en) |
BR (1) | BR7402241D0 (en) |
ES (1) | ES424660A1 (en) |
GB (1) | GB1385161A (en) |
IT (1) | IT1009707B (en) |
ZA (1) | ZA74410B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN201234336Y (en) | 2008-07-18 | 2009-05-06 | 比亚迪股份有限公司 | Receiver unit |
EP2329657A4 (en) * | 2008-08-29 | 2011-10-26 | Penn State Res Found | Methods and apparatus for reduced distortion balanced armature devices |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1671105A (en) * | 1927-06-23 | 1928-05-29 | Farrand Mfg Co Inc | Actuating device for loud speakers |
US2276951A (en) * | 1939-02-25 | 1942-03-17 | Standard Oil Dev Co | Chlorinated polyisobutylene and process of making the same |
US2588327A (en) * | 1948-01-31 | 1952-03-04 | Dictaphone Corp | Recorder head |
US3111496A (en) * | 1960-11-14 | 1963-11-19 | Us Rubber Co | High temperature blowing of rubber and plastics with alkali metal azodicarboxylate |
US3334195A (en) * | 1964-06-25 | 1967-08-01 | Artnell Company | Magnetic speaker construction |
-
1973
- 1973-03-27 GB GB1454573A patent/GB1385161A/en not_active Expired
-
1974
- 1974-01-21 ZA ZA740410A patent/ZA74410B/en unknown
- 1974-02-25 US US445708A patent/US3919500A/en not_active Expired - Lifetime
- 1974-03-20 AU AU66879/74A patent/AU6687974A/en not_active Expired
- 1974-03-22 BR BR742241A patent/BR7402241D0/en unknown
- 1974-03-26 ES ES424660A patent/ES424660A1/en not_active Expired
- 1974-04-08 IT IT20988/74A patent/IT1009707B/en active
Also Published As
Publication number | Publication date |
---|---|
AU6687974A (en) | 1975-09-25 |
US3919500A (en) | 1975-11-11 |
GB1385161A (en) | 1975-02-26 |
BR7402241D0 (en) | 1974-11-19 |
IT1009707B (en) | 1976-12-20 |
ES424660A1 (en) | 1976-10-16 |
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