NL52281C - - Google Patents
Info
- Publication number
- NL52281C NL52281C NL52281DA NL52281C NL 52281 C NL52281 C NL 52281C NL 52281D A NL52281D A NL 52281DA NL 52281 C NL52281 C NL 52281C
- 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
- H04R1/345—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 for loudspeakers
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE207880X | 1937-11-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL52281C true NL52281C (US06653308-20031125-C00173.png) |
Family
ID=5793936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL52281D NL52281C (US06653308-20031125-C00173.png) | 1937-11-10 |
Country Status (5)
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2689016A (en) * | 1953-04-14 | 1954-09-14 | Henry C Lang | Sound reproducing system |
| US3043912A (en) * | 1957-07-10 | 1962-07-10 | Laney William J De | Intercom for automobiles |
| US3065816A (en) * | 1958-03-10 | 1962-11-27 | Rangertone Electronics Corp | Stereophonic sound distributor |
| US3080012A (en) * | 1958-09-26 | 1963-03-05 | Columbia Broadcasting Syst Inc | Stereophonic loudspeaker arrays |
| US3045064A (en) * | 1959-06-01 | 1962-07-17 | Margaret H Sellers | Apparatus for transmitting sound from a baseball field |
| NL267133A (US06653308-20031125-C00173.png) * | 1960-07-15 | |||
| US3557324A (en) * | 1967-04-28 | 1971-01-19 | Yoshiro Nakamatsu | Television receiver having means for causing sound to emanate from picture plane |
| US3679023A (en) * | 1968-08-06 | 1972-07-25 | John C Rankin | Loudspeaker enclosure |
| US3642091A (en) * | 1968-10-09 | 1972-02-15 | Pioneer Electronic Corp | Underground acoustic device |
| US3590941A (en) * | 1969-10-10 | 1971-07-06 | Arvin Ind Inc | Speaker enclosure |
| US3674108A (en) * | 1970-10-29 | 1972-07-04 | David L Beatty | Outdoor speaker enclosure |
| US3964571A (en) * | 1975-04-01 | 1976-06-22 | Peter Garland Snell | Acoustic system |
| JPH0724439B2 (ja) * | 1986-09-13 | 1995-03-15 | シャープ株式会社 | オ−デイオ装置 |
| US5173942A (en) * | 1986-09-13 | 1992-12-22 | Sharp Kabushiki Kaisha | Audio system operable in directional and non-directional modes |
| US4949386A (en) * | 1988-05-23 | 1990-08-14 | Hill Amel L | Speaker system |
| US5033577A (en) * | 1988-12-06 | 1991-07-23 | Bose Corporation | Room sound reproducing |
| US8873788B1 (en) * | 2010-08-30 | 2014-10-28 | Jeffery James Coombs | In-ground audio sub woofer and method of installation |
| US10240796B1 (en) * | 2016-05-20 | 2019-03-26 | Beckwell Companies, LLC | Fire pit insert assembly |
| US10499128B2 (en) * | 2018-04-20 | 2019-12-03 | Sonos, Inc. | Playback devices having waveguides with drainage features |
| KR102507425B1 (ko) * | 2018-10-23 | 2023-03-09 | 현대자동차주식회사 | 차량용 스피커장치 |
| WO2021049136A1 (ja) * | 2019-09-13 | 2021-03-18 | パナソニックＩｐマネジメント株式会社 | 音響レンズ及びスピーカシステム |
-
0
- BE BE430974D patent/BE430974A/xx unknown
- NL NL52281D patent/NL52281C/xx active
-
1938
- 1938-11-03 CH CH207880D patent/CH207880A/de unknown
- 1938-11-10 GB GB32641/38A patent/GB508458A/en not_active Expired
- 1938-11-16 US US240650A patent/US2210477A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2210477A (en) | 1940-08-06 |
| GB508458A (en) | 1939-06-30 |
| CH207880A (de) | 1939-12-15 |
| BE430974A (US06653308-20031125-C00173.png) |
