BE428292A - - Google Patents

Info

Publication number
BE428292A
BE428292A BE428292DA BE428292A BE 428292 A BE428292 A BE 428292A BE 428292D A BE428292D A BE 428292DA BE 428292 A BE428292 A BE 428292A
Authority
BE
Belgium
Application number
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 filed Critical
Publication of BE428292A publication Critical patent/BE428292A/xx

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
    • H04R9/08—Microphones
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/72—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using ultrasonic, sonic or infrasonic waves
    • 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
    • H04R1/08—Mouthpieces; Microphones; Attachments therefor
    • H04R1/083—Special constructions of mouthpieces
    • 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
    • H04R1/38—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 in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone
    • 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
    • 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
BE428292D 1931-03-31 1938-05-27 BE428292A (xx)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US526598A US1885001A (en) 1931-03-31 1931-03-31 Apparatus for converting sound vibrations into electrical variations
US612466A US1892645A (en) 1931-03-31 1932-05-20 Sound pick-up device

Publications (1)

Publication Number Publication Date
BE428292A true BE428292A (xx) 1938-08-31

Family

ID=24097986

Family Applications (4)

Application Number Title Priority Date Filing Date
BE396402D BE396402A (xx) 1931-03-31
BE387520D BE387520A (xx) 1931-03-31 1932-03-31
BE389811D BE389811A (xx) 1931-03-31 1932-07-13
BE428292D BE428292A (xx) 1931-03-31 1938-05-27

Family Applications Before (3)

Application Number Title Priority Date Filing Date
BE396402D BE396402A (xx) 1931-03-31
BE387520D BE387520A (xx) 1931-03-31 1932-03-31
BE389811D BE389811A (xx) 1931-03-31 1932-07-13

Country Status (6)

Country Link
US (3) US1885001A (xx)
BE (4) BE387520A (xx)
DE (2) DE607620C (xx)
FR (1) FR733929A (xx)
GB (2) GB386478A (xx)
NL (1) NL39328C (xx)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2239503A (en) * 1938-08-05 1941-04-22 Rca Corp Sound pickup apparatus
US2476396A (en) * 1939-12-28 1949-07-19 Rca Corp Magnetic equalization of sensitivity in ribbon microphone assemblies
US2417927A (en) * 1943-03-22 1947-03-25 Automatic Elect Lab Sound direction finder
GB611209A (en) * 1944-08-29 1948-10-27 Standard Telephones Cables Ltd Improvements in or relating to microphones
US2544536A (en) * 1947-05-28 1951-03-06 Rca Corp Microphone
US2552311A (en) * 1948-08-28 1951-05-08 Rca Corp Ribbon support for high fidelity electroacoustical sound transducers
DE1047250B (de) * 1953-01-22 1958-12-24 Alexander Schaaf Elektroakustischer Wandler (Mikrofon und Lautsprecher) mit einer nach dem elektrostatischen Prinzip arbeitenden Membran
WO2006047048A2 (en) 2004-10-21 2006-05-04 Crowley Robert J Acoustic ribbon transducer arrangements
US7936894B2 (en) * 2004-12-23 2011-05-03 Motorola Mobility, Inc. Multielement microphone
WO2015077099A1 (en) * 2013-11-21 2015-05-28 Ghaffari Mohsen Tunable ribbon microphone
US9877110B2 (en) 2014-12-29 2018-01-23 Michael Patrick Timmins Ribbon support system for electrodynamic microphone
US10573291B2 (en) 2016-12-09 2020-02-25 The Research Foundation For The State University Of New York Acoustic metamaterial

Also Published As

Publication number Publication date
BE387520A (xx) 1932-05-31
DE607620C (de) 1935-01-03
US1892645A (en) 1932-12-27
USRE19115E (en) 1934-03-13
FR733929A (fr) 1932-10-14
DE656210C (de) 1938-01-31
BE389811A (xx) 1932-08-31
BE396402A (xx)
GB386478A (en) 1933-01-19
GB405497A (en) 1934-02-08
US1885001A (en) 1932-10-25
NL39328C (xx) 1936-11-16

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