FR30476E - Improvements to sound reproduction systems - Google Patents
Improvements to sound reproduction systemsInfo
- Publication number
- FR30476E FR30476E FR30476DA FR30476E FR 30476 E FR30476 E FR 30476E FR 30476D A FR30476D A FR 30476DA FR 30476 E FR30476 E FR 30476E
- Authority
- FR
- France
- Prior art keywords
- sound reproduction
- reproduction systems
- systems
- sound
- reproduction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
-
- 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
- H04R1/24—Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/04—Construction, mounting, or centering of coil
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Toys (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US702452A US1631646A (en) | 1924-03-27 | 1924-03-27 | Sound-reproducing apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
FR30476E true FR30476E (en) | 1926-07-17 |
Family
ID=24821277
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR595818D Expired FR595818A (en) | 1924-03-27 | 1925-03-26 | Improvements to sound reproduction systems |
FR30476D Expired FR30476E (en) | 1924-03-27 | 1925-03-26 | Improvements to sound reproduction systems |
FR47708D Expired FR47708E (en) | 1924-03-27 | 1936-10-17 | Improvements to sound reproduction systems |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR595818D Expired FR595818A (en) | 1924-03-27 | 1925-03-26 | Improvements to sound reproduction systems |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR47708D Expired FR47708E (en) | 1924-03-27 | 1936-10-17 | Improvements to sound reproduction systems |
Country Status (4)
Country | Link |
---|---|
US (1) | US1631646A (en) |
BE (3) | BE417960A (en) |
FR (3) | FR595818A (en) |
GB (3) | GB231421A (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2445276A (en) * | 1945-05-04 | 1948-07-13 | Massa Frank | Electrodynamic loudspeaker |
GB774121A (en) * | 1954-03-18 | 1957-05-08 | Ferranti Ltd | Improvements relating to gramophone pick-ups |
US6704425B1 (en) * | 1999-11-19 | 2004-03-09 | Virtual Bass Technologies, Llc | System and method to enhance reproduction of sub-bass frequencies |
FR2955445B1 (en) | 2010-01-15 | 2013-06-07 | Phl Audio | ELECTRODYNAMIC TRANSDUCER WITH DOME AND INTERNAL SUSPENSION |
FR2955444B1 (en) | 2010-01-15 | 2012-08-03 | Phl Audio | COAXIAL SPEAKER SYSTEM WITH COMPRESSION CHAMBER |
FR2955446B1 (en) | 2010-01-15 | 2015-06-05 | Phl Audio | ELECTRODYNAMIC TRANSDUCER WITH DOME AND FLOATING SUSPENSION |
-
1924
- 1924-03-27 US US702452A patent/US1631646A/en not_active Expired - Lifetime
- 1924-10-07 GB GB23691/24A patent/GB231421A/en not_active Expired
- 1924-10-07 GB GB23690/24A patent/GB231420A/en not_active Expired
-
1925
- 1925-03-26 FR FR595818D patent/FR595818A/en not_active Expired
- 1925-03-26 FR FR30476D patent/FR30476E/en not_active Expired
-
1935
- 1935-10-17 GB GB28723/35A patent/GB464418A/en not_active Expired
-
1936
- 1936-10-17 BE BE417960D patent/BE417960A/xx unknown
- 1936-10-17 FR FR47708D patent/FR47708E/en not_active Expired
-
1937
- 1937-05-28 BE BE421801D patent/BE421801A/xx unknown
-
1946
- 1946-09-14 BE BE324881D patent/BE324881A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
US1631646A (en) | 1927-06-07 |
BE324881A (en) | 1949-09-30 |
BE421801A (en) | 1937-06-30 |
FR47708E (en) | 1937-06-22 |
GB231420A (en) | 1925-08-20 |
GB464418A (en) | 1937-04-19 |
BE417960A (en) | 1936-11-30 |
GB231421A (en) | 1925-09-17 |
FR595818A (en) | 1925-10-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FR657396A (en) | Improvements to sound reproduction systems | |
FR30476E (en) | Improvements to sound reproduction systems | |
FR35605E (en) | Improvements to sound-producing devices | |
FR613218A (en) | Improvements to sound reproduction systems | |
FR644982A (en) | Improvements to sound reproduction systems | |
FR618595A (en) | Improvements to sound reproduction systems | |
FR607912A (en) | Improvements to sound transmitters and receivers | |
FR605544A (en) | Improvements to sound reproduction systems | |
FR549782A (en) | Improvements to sound reproduction systems | |
FR699474A (en) | Improvements to sound reproduction systems | |
FR657136A (en) | Improvements to sound reproduction systems | |
FR605491A (en) | Improvements to sound reproduction systems | |
FR577421A (en) | Improvements to sound receiving devices | |
FR731491A (en) | Improvements to sound reproduction devices | |
FR694448A (en) | Improvements to sound reproduction systems | |
FR644774A (en) | Improvements to sound reproducing devices, such as loudspeakers | |
FR583412A (en) | Improvements to sound amplifiers | |
FR715564A (en) | Improvements to sound reproduction systems | |
FR602427A (en) | Improvements to the acoustic horns of loudspeaker devices | |
FR719576A (en) | Improvements to sound reproduction systems | |
FR718371A (en) | Improvements to sound reproduction systems | |
FR588100A (en) | Improvements to loudspeaker receivers | |
FR618035A (en) | Improvements to sound reproducing devices | |
FR660494A (en) | Improvements to sound reproduction systems | |
FR680259A (en) | Improvements to sound reproduction systems |