NL219278A - - Google Patents
Info
- Publication number
- NL219278A NL219278A NL219278DA NL219278A NL 219278 A NL219278 A NL 219278A NL 219278D A NL219278D A NL 219278DA NL 219278 A NL219278 A NL 219278A
- 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
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
- H04R1/2807—Enclosures comprising vibrating or resonating arrangements
- H04R1/2815—Enclosures comprising vibrating or resonating arrangements of the bass reflex type
- H04R1/2819—Enclosures comprising vibrating or resonating arrangements of the bass reflex type for loudspeaker transducers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/12—Non-planar diaphragms or cones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/12—Non-planar diaphragms or cones
- H04R7/122—Non-planar diaphragms or cones comprising a plurality of sections or layers
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Multimedia (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 |
|---|---|---|---|
| IT556921 | 1956-07-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL219278A true NL219278A (fr) |
Family
ID=11120284
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL109829D NL109829C (fr) | 1956-07-24 | ||
| NL219278D NL219278A (fr) | 1956-07-24 |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL109829D NL109829C (fr) | 1956-07-24 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3009528A (fr) |
| BE (1) | BE559436A (fr) |
| CH (1) | CH355813A (fr) |
| DE (1) | DE1109736B (fr) |
| FR (1) | FR1183056A (fr) |
| GB (1) | GB854851A (fr) |
| NL (2) | NL219278A (fr) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8301653A (nl) * | 1983-05-10 | 1984-12-03 | Philips Nv | Elektro-akoestische omzetter met een luchtdoorlatend membraan. |
| DE3929266C1 (fr) * | 1989-09-02 | 1991-01-03 | Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De | |
| US5159139A (en) * | 1990-06-13 | 1992-10-27 | Evans Products, Inc. | Drumhead with overtone suppression |
| DE102015106240A1 (de) * | 2015-04-23 | 2016-10-27 | Valeo Schalter Und Sensoren Gmbh | Ultraschallsensor für ein Kraftfahrzeug mit einer Durchgangsöffnungen aufweisenden Membran, Verkleidungsanordnung sowie Kraftfahrzeug |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB248497A (en) * | 1924-12-12 | 1926-03-11 | John Sydney Robert James | Improvements in and relating to diaphragms for sound boxes |
| DE463900C (de) * | 1925-05-05 | 1928-08-04 | Kallistophon G M B H | Elektromagnetischer Lautsprecher mit einer als Faecher ausgebildeten Schallmembran |
| US2007746A (en) * | 1925-07-20 | 1935-07-09 | Rca Corp | Acoustic device |
| GB256395A (en) * | 1925-07-29 | 1926-08-12 | Charles Mahe De Chenal De La B | Improvements in, or relating to, loud-speakers, gramophones, and other sound-recording or reproducing apparatus |
| GB301638A (en) * | 1927-11-24 | 1928-12-06 | Sidney George Brown | Improvements in or relating to loud speakers |
| DE557850C (de) * | 1929-06-12 | 1932-09-01 | Cantora Soc | Tonwiedergabevorrichtung, Schalldose fuer Sprechmaschinen, elektrischer Lautsprecher o. dgl. |
| US1869178A (en) * | 1930-08-15 | 1932-07-26 | Bell Telephone Labor Inc | Sound translating device |
| US1997790A (en) * | 1931-03-07 | 1935-04-16 | Stephen L Heidrich | Acoustic diaphragm |
| DE593201C (de) * | 1931-04-15 | 1934-02-23 | I M K Syndicate Ltd | Vorrichtung zur Bildzerlegung und Bildzusammensetzung beim Fernsehen |
| US2022060A (en) * | 1934-08-29 | 1935-11-26 | Bell Telephone Labor Inc | Acoustic device |
| DE667495C (de) * | 1935-07-09 | 1938-11-12 | Telefunken Gmbh | Verfahren zur Herabsetzung der Eigenschwingungszahl auf einen festgelegten Sollwert von nach dem Pappenguss- bzw. Schoepfverfahren hergestellten Lautsprechermembranen |
| US2732908A (en) * | 1951-12-05 | 1956-01-31 | brittain | |
| US2766839A (en) * | 1953-03-16 | 1956-10-16 | Research Corp | Loudspeaker system |
| US2712360A (en) * | 1954-05-06 | 1955-07-05 | Reisz Eugene | Membrane for sound reproducing devices |
| US2845135A (en) * | 1955-09-26 | 1958-07-29 | Arthur Blumenfeld | Auxiliary wave propagating and directing attachment for loudspeaker diaphragms |
-
0
- NL NL109829D patent/NL109829C/xx active
- NL NL219278D patent/NL219278A/xx unknown
- BE BE559436D patent/BE559436A/xx unknown
-
1957
- 1957-07-18 US US672832A patent/US3009528A/en not_active Expired - Lifetime
- 1957-07-18 FR FR1183056D patent/FR1183056A/fr not_active Expired
- 1957-07-18 GB GB22764/57A patent/GB854851A/en not_active Expired
- 1957-07-19 DE DEF23524A patent/DE1109736B/de active Pending
- 1957-07-23 CH CH355813D patent/CH355813A/fr unknown
Also Published As
| Publication number | Publication date |
|---|---|
| GB854851A (en) | 1960-11-23 |
| BE559436A (fr) | |
| DE1109736B (de) | 1961-06-29 |
| CH355813A (fr) | 1961-07-31 |
| FR1183056A (fr) | 1959-07-02 |
| US3009528A (en) | 1961-11-21 |
| NL109829C (fr) |