BE467509A - - Google Patents
Info
- Publication number
- BE467509A BE467509A BE467509DA BE467509A BE 467509 A BE467509 A BE 467509A BE 467509D A BE467509D A BE 467509DA BE 467509 A BE467509 A BE 467509A
- 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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
- H04R1/38—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (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 |
|---|---|---|---|
| US472575A US2401328A (en) | 1943-01-16 | 1943-01-16 | Sound translating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE467509A true BE467509A (en) |
Family
ID=23876067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE467509D BE467509A (en) | 1943-01-16 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2401328A (en) |
| BE (1) | BE467509A (en) |
| FR (1) | FR939369A (en) |
| GB (1) | GB574611A (en) |
| NL (1) | NL72895C (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2532413A (en) * | 1946-12-31 | 1950-12-05 | Univ Loudspeakers Inc | Magnet structure for loud-speakers |
| US2546343A (en) * | 1946-12-31 | 1951-03-27 | Univ Loudspeakers Inc | Driver unit for loud-speakers |
| US2515031A (en) * | 1948-03-31 | 1950-07-11 | Bell Telephone Labor Inc | Microphone having controllable directional response pattern |
| US2587684A (en) * | 1948-10-13 | 1952-03-04 | Shure Bros | Directional microphone |
| DE945768C (en) * | 1949-06-05 | 1956-07-19 | Siemens Ag | Loudspeaker group arrangement consisting of several loudspeakers built in a row in a common baffle-like baffle |
| US2695370A (en) * | 1950-07-04 | 1954-11-23 | Hartford Nat Bank & Trust Co | Permanent magnet for dynamoelectric machines |
| NL102054C (en) * | 1954-01-11 | |||
| US2865464A (en) * | 1954-08-07 | 1958-12-23 | Gorike Rudolf | Unidirectional dynamic microphone |
| DE1073546B (en) * | 1955-05-26 | 1960-01-21 | Rudolf Gorike Wien Dr | Directional microphone with low vibration and wind sensitivity |
| US3061690A (en) * | 1958-09-15 | 1962-10-30 | Turner Company | Acoustically compensated microphone with adjustable acoustic resistance |
| NL147916B (en) * | 1966-10-22 | 1975-11-17 | Philips Nv | ELECTRODYNAMIC MICROPHONE WITH CARDIOID-SHAPED TARGETING CHARACTERISTICS. |
| US3342285A (en) * | 1966-12-19 | 1967-09-19 | Standard Systems Comm Corp | Combination pillow speaker and control unit |
| US3679022A (en) * | 1969-07-04 | 1972-07-25 | Nippon Musical Instruments Mfg | Speaker box |
| DE19710967C1 (en) * | 1997-03-17 | 1998-10-22 | Karl Heinz Koeppen | Full range speakers |
| USD395893S (en) | 1997-05-30 | 1998-07-07 | Telex Communications, Inc. | Microphone |
-
0
- NL NL72895D patent/NL72895C/xx active
- BE BE467509D patent/BE467509A/xx unknown
-
1943
- 1943-01-16 US US472575A patent/US2401328A/en not_active Expired - Lifetime
-
1944
- 1944-01-13 GB GB681/44A patent/GB574611A/en not_active Expired
-
1946
- 1946-10-09 FR FR939369D patent/FR939369A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL72895C (en) | |
| US2401328A (en) | 1946-06-04 |
| GB574611A (en) | 1946-01-14 |
| FR939369A (en) | 1948-11-12 |