BE465934A - - Google Patents
Info
- Publication number
- BE465934A BE465934A BE465934DA BE465934A BE 465934 A BE465934 A BE 465934A BE 465934D A BE465934D A BE 465934DA BE 465934 A BE465934 A BE 465934A
- Authority
- BE
- Belgium
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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/10—Telephone receivers
-
- 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
-
- 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
-
- 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
- H04R9/08—Microphones
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (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 |
|---|---|---|---|
| GB257773X | 1943-09-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE465934A true BE465934A (fr) |
Family
ID=10233117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE465934D BE465934A (fr) | 1943-09-28 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2509224A (fr) |
| BE (1) | BE465934A (fr) |
| CH (1) | CH257773A (fr) |
| FR (1) | FR939106A (fr) |
| GB (1) | GB570337A (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2714134A (en) * | 1951-02-27 | 1955-07-26 | Martin L Touger | Headset receiver |
| US3925626A (en) * | 1974-02-22 | 1975-12-09 | Jr Robert John Stallings | Dynamic speaker having dome diaphragm and basket frequency |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1952357A (en) * | 1930-09-12 | 1934-03-27 | Columbia Graphophone Co Ltd | Electromechanical device |
| US1954966A (en) * | 1931-01-31 | 1934-04-17 | Bell Telephone Labor Inc | Sound translating device |
| US1964606A (en) * | 1932-04-12 | 1934-06-26 | Bell Telephone Labor Inc | Acoustic device |
| US2084944A (en) * | 1933-07-03 | 1937-06-22 | Lionel B Cornwell | Acoustic device |
| US2095373A (en) * | 1934-11-09 | 1937-10-12 | Bendix Radio Corp | Sound translating device |
-
0
- BE BE465934D patent/BE465934A/xx unknown
-
1943
- 1943-09-28 GB GB15894/43A patent/GB570337A/en not_active Expired
-
1944
- 1944-09-16 US US554407A patent/US2509224A/en not_active Expired - Lifetime
-
1946
- 1946-01-14 CH CH257773D patent/CH257773A/de unknown
- 1946-04-03 FR FR939106D patent/FR939106A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2509224A (en) | 1950-05-30 |
| GB570337A (en) | 1945-07-03 |
| FR939106A (fr) | 1948-11-04 |
| CH257773A (de) | 1948-10-31 |