GB536066A - Improvements in or relating to electro-acoustic apparatus - Google Patents
Improvements in or relating to electro-acoustic apparatusInfo
- Publication number
- GB536066A GB536066A GB29091/39A GB2909139A GB536066A GB 536066 A GB536066 A GB 536066A GB 29091/39 A GB29091/39 A GB 29091/39A GB 2909139 A GB2909139 A GB 2909139A GB 536066 A GB536066 A GB 536066A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tubes
- sound
- oct
- acoustic resistance
- translating element
- 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
- 230000002745 absorbent Effects 0.000 abstract 1
- 239000002250 absorbent Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
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
- H04R1/342—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 microphones
-
- 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
- H04R1/222—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only for microphones
-
- 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)
- Pipe Accessories (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Exhaust Silencers (AREA)
Abstract
536,066. Sound-directing appliances. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Oct. 31, 1939, No. 29091. Convention date, Oct. 31, 1938. [Class 13] [Also in Group XXXIX] A directional microphone comprises a plurality of tubes 1-6 of progressively increasing length on the front side of a sound translating element 8, and an acoustic resistance 9 on its rear side. The acoustic resistance consists of a member 9 in which is a sound absorbent material 10 such as felt. Various forms of the tubes 1-6 and member 9 are described with reference to Figs. 2 to 14 (not shown) amongst which are arrangements in which two sets of tubes operate differentially on the sound translating element. The plurality of tubes 1-6 may be replaced by a single tube having spaced lateral holes, Figs. 15 to 18 (not shown). Specification 479,328 is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US237960A US2228886A (en) | 1938-10-31 | 1938-10-31 | Electroacoustical apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB536066A true GB536066A (en) | 1941-05-01 |
Family
ID=22895938
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB29091/39A Expired GB536066A (en) | 1938-10-31 | 1939-10-31 | Improvements in or relating to electro-acoustic apparatus |
Country Status (3)
Country | Link |
---|---|
US (1) | US2228886A (en) |
FR (1) | FR861267A (en) |
GB (1) | GB536066A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1014595B (en) * | 1955-02-15 | 1957-08-29 | Lab Wennebostel | Directional microphone |
FR2507849A1 (en) * | 1981-06-15 | 1982-12-17 | Western Electric Co | ACOUSTIC APPARATUS WITH DIRECTIONAL RESPONSE DIAGRAM |
FR2552291A1 (en) * | 1983-09-21 | 1985-03-22 | American Telephone & Telegraph | DIRECTIONAL ACOUSTIC TRANSDUCER |
GB2322256A (en) * | 1997-02-17 | 1998-08-19 | Sennheiser Electronic | Interference tube directional microphone with sound inlets either side of the transducer |
US6091829A (en) * | 1998-01-23 | 2000-07-18 | Earthworks, Inc. | Microphone apparatus |
US6158902A (en) * | 1997-01-30 | 2000-12-12 | Sennheiser Electronic Gmbh & Co. Kg | Boundary layer microphone |
Families Citing this family (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2463762A (en) * | 1941-11-14 | 1949-03-08 | Automatic Elect Lab | Electroacoustical transducer |
US2485405A (en) * | 1944-04-21 | 1949-10-18 | Stromberg Carlson Co | Dipole microphone |
DE960904C (en) * | 1949-11-06 | 1957-05-02 | Siemens Ag | Device for sound receiver with two pressure chambers formed by a microphone and pipes connected to them |
US2566094A (en) * | 1950-06-22 | 1951-08-28 | Rca Corp | Line type pressure responsive microphone |
US2739659A (en) * | 1950-09-05 | 1956-03-27 | Fred B Daniels | Acoustic device |
US2789651A (en) * | 1950-09-05 | 1957-04-23 | Fred B Daniels | Acoustic device |
US2718272A (en) * | 1950-12-29 | 1955-09-20 | Rca Corp | Dynamic microphone |
US2856022A (en) * | 1954-08-06 | 1958-10-14 | Electro Sonic Lab Inc | Directional acoustic signal transducer |
DE1073546B (en) * | 1955-05-26 | 1960-01-21 | Rudolf Gorike Wien Dr | Directional microphone with low vibration and wind sensitivity |
US2927167A (en) * | 1957-03-25 | 1960-03-01 | Soundtronic Corp Of America | Pick-up for musical instruments |
US2928490A (en) * | 1957-04-30 | 1960-03-15 | Sennheiser Electronic | Sound directing apparatus |
AT228283B (en) * | 1961-02-06 | 1963-07-10 | Akg Akustische Kino Geraete | Electroacoustic transducer built into a capsule with a transistor amplifier, particularly for handsets in telephone stations |
US3286782A (en) * | 1962-04-09 | 1966-11-22 | United Res Inc | Energy coupling device |
US3715500A (en) * | 1971-07-21 | 1973-02-06 | Bell Telephone Labor Inc | Unidirectional microphones |
AT358113B (en) * | 1978-11-23 | 1980-08-25 | Akg Akustische Kino Geraete | DIRECTIONAL MICROPHONE ACCORDING TO THE INTERFERENCE PRINCIPLE |
US4768614A (en) * | 1986-11-28 | 1988-09-06 | Case Eliot M | Unidirectional enhancer for microphones |
JP2945983B2 (en) * | 1987-03-25 | 1999-09-06 | 久次 中村 | Speaker device |
DK163400C (en) * | 1989-05-29 | 1992-07-13 | Brueel & Kjaer As | PROBE MICROPHONE |
US5206465A (en) * | 1990-06-01 | 1993-04-27 | Gin Kon Jung | Sound collecting and concentrating device for attaching to the back of a loudspeaker |
US5296656A (en) * | 1990-06-01 | 1994-03-22 | Gin Kon Jung | Sound collecting and concentrating device for attaching to the back of multiple loudspeakers |
US5025886A (en) * | 1990-06-01 | 1991-06-25 | Jung Gin K | Multi-ported and multi-directional loudspeaker system |
US5734728A (en) * | 1994-11-30 | 1998-03-31 | Meissner; Juergen P. | Portable sound speaker system and driving circuit therefor |
US6788791B2 (en) * | 2002-08-09 | 2004-09-07 | Shure Incorporated | Delay network microphones with harmonic nesting |
GB0410962D0 (en) * | 2004-05-17 | 2004-06-16 | Mordaunt Short Ltd | Loudspeaker |
US7813519B2 (en) * | 2006-02-02 | 2010-10-12 | General Motors Llc | Microphone apparatus with increased directivity |
US7801320B2 (en) * | 2006-03-09 | 2010-09-21 | Nokia Corporation | Sound sponge for loudspeakers |
US7986800B2 (en) * | 2007-02-20 | 2011-07-26 | Fortemedia, Inc. | Device with acoustic guard |
US7656749B2 (en) * | 2007-09-04 | 2010-02-02 | The United States Of America As Represented By The Secretary Of The Army | Systems and methods for analyzing acoustic waves |
-
1938
- 1938-10-31 US US237960A patent/US2228886A/en not_active Expired - Lifetime
-
1939
- 1939-10-30 FR FR861267D patent/FR861267A/en not_active Expired
- 1939-10-31 GB GB29091/39A patent/GB536066A/en not_active Expired
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1014595B (en) * | 1955-02-15 | 1957-08-29 | Lab Wennebostel | Directional microphone |
FR2507849A1 (en) * | 1981-06-15 | 1982-12-17 | Western Electric Co | ACOUSTIC APPARATUS WITH DIRECTIONAL RESPONSE DIAGRAM |
FR2552291A1 (en) * | 1983-09-21 | 1985-03-22 | American Telephone & Telegraph | DIRECTIONAL ACOUSTIC TRANSDUCER |
GB2146870A (en) * | 1983-09-21 | 1985-04-24 | American Telephone & Telegraph | Directional acoustic transducer |
US6158902A (en) * | 1997-01-30 | 2000-12-12 | Sennheiser Electronic Gmbh & Co. Kg | Boundary layer microphone |
GB2322256A (en) * | 1997-02-17 | 1998-08-19 | Sennheiser Electronic | Interference tube directional microphone with sound inlets either side of the transducer |
GB2322256B (en) * | 1997-02-17 | 2001-09-19 | Sennheiser Electronic | A directional microphone having symmetrical directivity |
US6418229B1 (en) | 1997-02-17 | 2002-07-09 | Sennheiser Electronic Gmbh & Co. Kg | Directional microphone, in particular having symmetrical directivity |
US6091829A (en) * | 1998-01-23 | 2000-07-18 | Earthworks, Inc. | Microphone apparatus |
Also Published As
Publication number | Publication date |
---|---|
FR861267A (en) | 1941-02-05 |
US2228886A (en) | 1941-01-14 |
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