ZA74476B - Improvements in or relating to electric acoustic transducers - Google Patents
Improvements in or relating to electric acoustic transducersInfo
- Publication number
- ZA74476B ZA74476B ZA740476A ZA74476A ZA74476B ZA 74476 B ZA74476 B ZA 74476B ZA 740476 A ZA740476 A ZA 740476A ZA 74476 A ZA74476 A ZA 74476A ZA 74476 B ZA74476 B ZA 74476B
- Authority
- ZA
- South Africa
- Prior art keywords
- relating
- acoustic transducers
- electric acoustic
- electric
- 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)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB996073A GB1376414A (en) | 1973-03-01 | 1973-03-01 | Electro acoustic-transducers |
Publications (1)
Publication Number | Publication Date |
---|---|
ZA74476B true ZA74476B (en) | 1974-12-24 |
Family
ID=9881960
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ZA740476A ZA74476B (en) | 1973-03-01 | 1974-01-23 | Improvements in or relating to electric acoustic transducers |
Country Status (3)
Country | Link |
---|---|
GB (1) | GB1376414A (it) |
IT (1) | IT1051573B (it) |
ZA (1) | ZA74476B (it) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN201234336Y (zh) | 2008-07-18 | 2009-05-06 | 比亚迪股份有限公司 | 一种听筒单元 |
-
1973
- 1973-03-01 GB GB996073A patent/GB1376414A/en not_active Expired
-
1974
- 1974-01-23 ZA ZA740476A patent/ZA74476B/xx unknown
- 1974-03-27 IT IT49733/74A patent/IT1051573B/it active
Also Published As
Publication number | Publication date |
---|---|
GB1376414A (en) | 1974-12-04 |
IT1051573B (it) | 1981-05-20 |
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