GB655574A - Improvements relating to sound responsive devices, and more especially to unidirectional microphones - Google Patents

Improvements relating to sound responsive devices, and more especially to unidirectional microphones

Info

Publication number
GB655574A
GB655574A GB3406347A GB3406347A GB655574A GB 655574 A GB655574 A GB 655574A GB 3406347 A GB3406347 A GB 3406347A GB 3406347 A GB3406347 A GB 3406347A GB 655574 A GB655574 A GB 655574A
Authority
GB
United Kingdom
Prior art keywords
diaphragms
microphone
diaphragm
mass
directional
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
GB3406347A
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.)
ALPHA MILTON WIGGINS
Original Assignee
ALPHA MILTON WIGGINS
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 to FR959402D priority Critical patent/FR959402A/fr
Priority to US685337A priority patent/US2627558A/en
Application filed by ALPHA MILTON WIGGINS filed Critical ALPHA MILTON WIGGINS
Priority to GB3406347A priority patent/GB655574A/en
Publication of GB655574A publication Critical patent/GB655574A/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
    • H04R1/34—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
    • H04R1/08—Mouthpieces; Microphones; Attachments therefor
    • H04R1/083—Special constructions of mouthpieces

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)

Abstract

655,574. Microphones. WIGGINS, A. M. Dec. 23, 1947, No. 34063. [A Specification was laid open to inspection under Sect. 91 of the Acts, Jan. 23, 1948.] Drawings to Specification. [Class 40 (iv)] A directional microphone comprises at least two diaphragms each mounted by and spanning an opening in a casing so as to form a substantially closed chamber, but only one of the diaphragms serves to translate its vibrations into electrical energy. The other diaphragm or combination of diaphragms has a mass and resistance of a value sufficient to, and constituting the main factors acting to, produce a phase-shift in sound waves impinging upon it of such a value as to render the microphone directional. The Specification contains a mathematical analysis of the mode of operation of the microphone from which the values of mass and resistance required are obtained. Piezo-electric, moving-coil, ribbon, and condenser microphone embodiments are described. Additional damping may be applied to the other diaphragm or diaphragms by means of rubber pads bearing thereon or by silk screens adjacent thereto.
GB3406347A 1946-07-22 1947-12-23 Improvements relating to sound responsive devices, and more especially to unidirectional microphones Expired GB655574A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR959402D FR959402A (en) 1947-12-23
US685337A US2627558A (en) 1946-07-22 1946-07-22 Unidirectional microphone
GB3406347A GB655574A (en) 1947-12-23 1947-12-23 Improvements relating to sound responsive devices, and more especially to unidirectional microphones

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3406347A GB655574A (en) 1947-12-23 1947-12-23 Improvements relating to sound responsive devices, and more especially to unidirectional microphones

Publications (1)

Publication Number Publication Date
GB655574A true GB655574A (en) 1951-07-25

Family

ID=10360909

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3406347A Expired GB655574A (en) 1946-07-22 1947-12-23 Improvements relating to sound responsive devices, and more especially to unidirectional microphones

Country Status (2)

Country Link
FR (1) FR959402A (en)
GB (1) GB655574A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109121052A (en) * 2018-08-16 2019-01-01 努比亚技术有限公司 Double-sided receiver structure, double screen earpiece switching method and its terminal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109121052A (en) * 2018-08-16 2019-01-01 努比亚技术有限公司 Double-sided receiver structure, double screen earpiece switching method and its terminal
CN109121052B (en) * 2018-08-16 2021-01-26 努比亚技术有限公司 Double-sided receiver structure, double-screen receiver switching method and terminal thereof

Also Published As

Publication number Publication date
FR959402A (en) 1950-03-30

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