GB700935A - Improvements in or relating to microphones - Google Patents
Improvements in or relating to microphonesInfo
- Publication number
- GB700935A GB700935A GB13939/51A GB1393951A GB700935A GB 700935 A GB700935 A GB 700935A GB 13939/51 A GB13939/51 A GB 13939/51A GB 1393951 A GB1393951 A GB 1393951A GB 700935 A GB700935 A GB 700935A
- Authority
- GB
- United Kingdom
- Prior art keywords
- line
- directional
- microphones
- june
- frequency
- 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
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 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
- H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
- H04R1/406—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers microphones
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
700,935. Sound reproducing circuits. SIEMENS & HALSKE AKT.-GES. June 12, 1951 [June 12,1950], No. 13939/51. Class 40 (4) A directional microphone system comprises at least three microphones arranged in a straight line and connected to a single output circuit, the length of the line being not greater than half the wavelength of a medium frequency of the audio-frequency band, that is a frequency of the order of 800-1,000 cycles per second. Such a system exhibits a directional characteristic for the higher frequencies. The microphones are preferably screened by a hood of sound-permeable wire-netting. In a modification, two such lines are mounted parallel to one another and their outputs are connected in opposition so that the whole system acts as a pressure gradient transducer. Fig. 3 in which each line is represented by a condenser microphone 12, 13 illustrates the circuitry, elements 14, 17 and 19 being resistors. A low-pass filter 20 renders the line 13 ineffective at the frequencies at which the line 12 is directional.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE700935X | 1950-06-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB700935A true GB700935A (en) | 1953-12-16 |
Family
ID=6610156
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB13939/51A Expired GB700935A (en) | 1950-06-12 | 1951-06-12 | Improvements in or relating to microphones |
Country Status (2)
Country | Link |
---|---|
US (1) | US2810786A (en) |
GB (1) | GB700935A (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL6405564A (en) * | 1964-05-20 | 1965-11-22 | Philips Nv | |
US4311874A (en) * | 1979-12-17 | 1982-01-19 | Bell Telephone Laboratories, Incorporated | Teleconference microphone arrays |
DE3843034A1 (en) * | 1988-12-21 | 1990-06-28 | Messerschmitt Boelkow Blohm | MICROPHONE SYSTEM FOR DETERMINING THE DIRECTION AND POSITION OF A SOUND SOURCE |
FR2742960B1 (en) * | 1995-12-22 | 1998-02-20 | Mahieux Yannick | ACOUSTIC ANTENNA FOR COMPUTER WORKSTATION |
GB2494849A (en) * | 2011-04-14 | 2013-03-27 | Orbitsound Ltd | Microphone assembly |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1422877A (en) * | 1920-01-02 | 1922-07-18 | Western Electric Co | Acoustical aid for deaf persons |
US1855149A (en) * | 1927-04-13 | 1932-04-19 | Jones W Bartlett | Method and means for the ventriloquial production of sound |
US1755484A (en) * | 1927-07-16 | 1930-04-22 | Mark Le Roy | Speech amplifying and reproducing system |
US1897222A (en) * | 1928-11-10 | 1933-02-14 | Rca Corp | Sound recording |
US1988001A (en) * | 1932-08-19 | 1935-01-15 | Bell Telephone Labor Inc | Vibration translating system |
US1975283A (en) * | 1932-12-31 | 1934-10-02 | United Res Corp | Sound recording |
US2173219A (en) * | 1937-05-29 | 1939-09-19 | Rca Corp | Electroacoustical apparatus |
US2309109A (en) * | 1937-06-04 | 1943-01-26 | Rca Corp | Microphone |
US2396519A (en) * | 1939-10-31 | 1946-03-12 | Rca Corp | Electroacoustical apparatus and method of using the same |
US2305599A (en) * | 1941-04-08 | 1942-12-22 | S N Shure | Conversion of wave motion into electrical energy |
US2301744A (en) * | 1941-05-31 | 1942-11-10 | Rca Corp | Electroacoustical signal translating apparatus |
US2396222A (en) * | 1942-10-26 | 1946-03-05 | Brush Dev Co | Sound receiving system |
-
1951
- 1951-06-06 US US230104A patent/US2810786A/en not_active Expired - Lifetime
- 1951-06-12 GB GB13939/51A patent/GB700935A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2810786A (en) | 1957-10-22 |
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