BE477474A - IMPROVEMENTS TO MICROPHONES - Google Patents

IMPROVEMENTS TO MICROPHONES

Info

Publication number
BE477474A
BE477474A BE477474DA BE477474A BE 477474 A BE477474 A BE 477474A BE 477474D A BE477474D A BE 477474DA BE 477474 A BE477474 A BE 477474A
Authority
BE
Belgium
Prior art keywords
microphones
Prior art date
Application number
Other languages
French (fr)
Original Assignee
Bell Telephone Manufacturing Company S.A.
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
Priority claimed from GB15574/44A external-priority patent/GB594082A/en
Priority claimed from GB21942/45A external-priority patent/GB616158A/en
Application filed by Bell Telephone Manufacturing Company S.A. filed Critical Bell Telephone Manufacturing Company S.A.
Publication of BE477474A publication Critical patent/BE477474A/en

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
    • H04R21/00—Variable-resistance transducers
    • H04R21/02—Microphones
    • H04R21/021—Microphones with granular resistance material
    • 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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Toys (AREA)
BE477474D 1944-08-15 1947-11-20 IMPROVEMENTS TO MICROPHONES BE477474A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB15574/44A GB594082A (en) 1945-08-27 1944-08-15 Improvements in or relating to microphones
GB21942/45A GB616158A (en) 1944-08-15 1945-08-27 Improvements in or relating to electro-acoustic devices
GB2131/47A GB631970A (en) 1944-08-15 1947-01-23 Improvements in or relating to acoustic diaphragms

Publications (1)

Publication Number Publication Date
BE477474A true BE477474A (en) 1948-05-20

Family

ID=36952628

Family Applications (3)

Application Number Title Priority Date Filing Date
BE482597D BE482597A (en) 1944-08-15
BE477474D BE477474A (en) 1944-08-15 1947-11-20 IMPROVEMENTS TO MICROPHONES
BE478254D BE478254A (en) 1944-08-15 1947-12-17 ELECTRO-ACOUSTIC DEVICES

Family Applications Before (1)

Application Number Title Priority Date Filing Date
BE482597D BE482597A (en) 1944-08-15

Family Applications After (1)

Application Number Title Priority Date Filing Date
BE478254D BE478254A (en) 1944-08-15 1947-12-17 ELECTRO-ACOUSTIC DEVICES

Country Status (6)

Country Link
US (2) US2521744A (en)
BE (3) BE477474A (en)
CH (2) CH271258A (en)
DE (3) DE940654C (en)
FR (3) FR939111A (en)
GB (1) GB631970A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012220006A1 (en) * 2012-11-02 2014-05-08 Robert Bosch Gmbh Component with a micromechanical microphone structure
USD966235S1 (en) 2019-08-23 2022-10-11 Tymphany Acoustic Technology Limited Waveguide

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1141107A (en) * 1902-01-27 1915-06-01 Kellogg Switchboard & Supply Telephone-transmitter.
US1226886A (en) * 1913-05-13 1917-05-22 New Jersey Patent Co Telephone-transmitter.
US1352939A (en) * 1917-02-24 1920-09-14 Western Electric Co Telephone-transmitter
US1869230A (en) * 1929-08-16 1932-07-26 Philadelphia Storage Battery Electrical element
US1848433A (en) * 1929-09-09 1932-03-08 Magnavox Co Loud speaker element
US1846351A (en) * 1930-06-13 1932-02-23 Murkham Leonard Walter Electrodynamic sound-reproducing device
US1943425A (en) * 1931-12-26 1934-01-16 Kellogg Switchboard & Supply Diaphragm
US2069242A (en) * 1933-01-19 1937-02-02 George A Graham Electroacoustic energy converting system
US1930328A (en) * 1933-01-25 1933-10-10 Tichenor Sound reproducing diaphragm
BE402491A (en) * 1933-05-11
GB425558A (en) * 1933-10-26 1935-03-18 Alfred Graham & Co Ltd Improvements relating to telephones
GB425186A (en) * 1933-11-24 1935-03-08 Alfred Graham & Co Ltd Improvements relating to telephones
US2043833A (en) * 1934-11-12 1936-06-09 Abraham I Klotz Protecting framing for brief cases
US2191992A (en) * 1937-03-31 1940-02-27 Int Standard Electric Corp Telephone transmitter
US2293078A (en) * 1939-12-05 1942-08-18 B A Proctor Company Inc Microphone
CH220358A (en) * 1940-10-26 1942-03-31 Fides Gmbh Capsule microphone.

Also Published As

Publication number Publication date
BE478254A (en) 1948-05-17
FR58186E (en) 1953-09-29
DE873103C (en) 1953-04-09
FR939111A (en) 1948-11-04
BE482597A (en)
CH263325A (en) 1949-08-31
DE862768C (en) 1953-01-12
US2539488A (en) 1951-01-30
FR57814E (en) 1953-09-17
US2521744A (en) 1950-09-12
CH271258A (en) 1950-10-15
DE940654C (en) 1956-03-22
GB631970A (en) 1949-11-14

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