BE500297A - - Google Patents
Info
- Publication number
- BE500297A BE500297A BE500297DA BE500297A BE 500297 A BE500297 A BE 500297A BE 500297D A BE500297D A BE 500297DA BE 500297 A BE500297 A BE 500297A
- 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
- H04R11/00—Transducers of moving-armature or moving-core type
- H04R11/06—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
- H04R11/00—Transducers of moving-armature or moving-core type
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electromagnetism (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEI4800A DE959924C (de) | 1951-10-31 | 1951-10-31 | Elektroakustischer Wandler, insbesondere Hoerkapsel in Fernsprechanlagen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE500297A true BE500297A (da) |
Family
ID=7184842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE500297D BE500297A (da) | 1951-10-31 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE500297A (da) |
| DE (1) | DE959924C (da) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB806428A (en) * | 1956-03-29 | 1958-12-23 | Sten Daniel Vigren | Improvements in or relating to polarized electromagnetic devices |
| NL255013A (da) * | 1959-08-21 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE454275C (de) * | 1924-02-19 | 1928-01-03 | Neufeldt & Kuhnke Betr Sgesell | Lautsprechendes Telephon mit einem besonderen, mit der Membranmitte gekuppelten Anker |
| US1814798A (en) * | 1929-03-14 | 1931-07-14 | Gen Electric | Apparatus for producing sound |
| GB396990A (en) * | 1932-12-06 | 1933-08-17 | John Henry Walter Lewis | Improvements in loud speakers and other apparatus for interconverting electrical andacoustic vibrations |
| BE476263A (da) * | 1946-06-21 |
-
0
- BE BE500297D patent/BE500297A/xx unknown
-
1951
- 1951-10-31 DE DEI4800A patent/DE959924C/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE959924C (de) | 1957-03-14 |