GB700935A - Improvements in or relating to microphones - Google Patents

Improvements in or relating to microphones

Info

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
Application number
GB13939/51A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Publication of GB700935A publication Critical patent/GB700935A/en
Expired legal-status Critical Current

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
    • H04R1/40—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.
GB13939/51A 1950-06-12 1951-06-12 Improvements in or relating to microphones Expired GB700935A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
US2810786A (en) 1957-10-22

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