NL102054C - - Google Patents
Info
- Publication number
- NL102054C NL102054C NL102054DA NL102054C NL 102054 C NL102054 C NL 102054C NL 102054D A NL102054D A NL 102054DA NL 102054 C NL102054 C NL 102054C
- Authority
- NL
- Netherlands
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
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US403099A US3115207A (en) | 1954-01-11 | 1954-01-11 | Unidirectional microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL102054C true NL102054C (en) |
Family
ID=23594464
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL102054D NL102054C (en) | 1954-01-11 | ||
| NL190970D NL190970A (en) | 1954-01-11 |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL190970D NL190970A (en) | 1954-01-11 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US3115207A (en) |
| GB (1) | GB774003A (en) |
| NL (2) | NL190970A (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1096420B (en) * | 1958-12-24 | 1961-01-05 | Sennheiser Electronic | Electroacoustic directional converter |
| US3095484A (en) * | 1959-10-22 | 1963-06-25 | Electro Voice | Unidirectional microphone |
| US3378649A (en) * | 1964-09-04 | 1968-04-16 | Electro Voice | Pressure gradient directional microphone |
| AT251668B (en) * | 1964-10-16 | 1967-01-10 | Akg Akustische Kino Geraete | Electroacoustic converter |
| NL6604150A (en) * | 1966-03-30 | 1967-10-02 | ||
| US4410770A (en) * | 1981-06-08 | 1983-10-18 | Electro-Voice, Incorporated | Directional microphone |
| ATA74486A (en) * | 1986-03-20 | 1987-04-15 | Akg Akustische Kino Geraete | DIRECTIONAL MICROPHONE ACCORDING TO THE ELECTROSTATIC OR ELECTRODYNAMIC CONVERTER PRINCIPLE |
| US5070530A (en) * | 1987-04-01 | 1991-12-03 | Grodinsky Robert M | Electroacoustic transducers with increased magnetic stability for distortion reduction |
| US8818009B2 (en) * | 2012-10-23 | 2014-08-26 | Shure Acquisition Holdings, Inc. | Dual diaphragm dynamic microphone transducer |
| JP2018148435A (en) * | 2017-03-07 | 2018-09-20 | 株式会社オーディオテクニカ | Electro-acoustic transducer, manufacturing method of electro-acoustic transducer, and electro-acoustic conversion device |
| US11134337B2 (en) | 2019-11-18 | 2021-09-28 | Bose Corporation | Variable port microphone |
| US11418873B2 (en) | 2020-11-03 | 2022-08-16 | Edward J. Simon | Surveillance microphone |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2216961A (en) * | 1937-09-30 | 1940-10-08 | Rca Corp | Sound translating apparatus |
| US2252846A (en) * | 1938-09-30 | 1941-08-19 | Associated Electric Lab Inc | Acoustic device |
| BE467509A (en) * | 1943-01-16 | |||
| NL67077C (en) * | 1945-12-03 | |||
| DE1073545B (en) * | 1953-06-02 | 1960-01-21 | Akustische u Kino Gerate Ges mbH, Wien | Dynamic directional microphone |
-
0
- NL NL102054D patent/NL102054C/xx active
- NL NL190970D patent/NL190970A/xx unknown
-
1954
- 1954-01-11 US US403099A patent/US3115207A/en not_active Expired - Lifetime
- 1954-08-31 GB GB25298/54A patent/GB774003A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US3115207A (en) | 1963-12-24 |
| GB774003A (en) | 1957-05-01 |
| NL190970A (en) |