GB611179A - Improvements in and relating to acoustic instruments, such as loud speakers and directional microphones - Google Patents

Improvements in and relating to acoustic instruments, such as loud speakers and directional microphones

Info

Publication number
GB611179A
GB611179A GB12391/46A GB1239146A GB611179A GB 611179 A GB611179 A GB 611179A GB 12391/46 A GB12391/46 A GB 12391/46A GB 1239146 A GB1239146 A GB 1239146A GB 611179 A GB611179 A GB 611179A
Authority
GB
United Kingdom
Prior art keywords
cone
diaphragm
relating
loud
reflectors
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
GB12391/46A
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.)
ANDRE MARIE BERNARD CHARLIN
Original Assignee
ANDRE MARIE BERNARD CHARLIN
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 ANDRE MARIE BERNARD CHARLIN filed Critical ANDRE MARIE BERNARD CHARLIN
Publication of GB611179A publication Critical patent/GB611179A/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
    • H04R1/345—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 for loudspeakers

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)

Abstract

611,179. Sound directing devices. CHARLIN, A. M. B. April 24, 1946, No. 12391. Convention date, April 5, 1939. [Class 13] In an instrument such as a loud-speaker or directional microphone comprising a vibrating diaphragm, annular reflectors are distributed over the surface of the diaphragm. The purpose is to reduce inefficiency due to whirling motion set up in the air by the diaphragm. For example, a loud-speaker with a cone 6 operated by a moving coil 7 has annular reflectors 8, 9, 10, 11, 12, 13, 14 and 15 disposed around the cone. The mounting means for the moving coil is perforated to avoid compression of the air under the apex of the cone. In a modification, further reflectors may be used on the other surface of the cone to direct the sound waves from this side into an acoustic labyrinth.
GB12391/46A 1939-04-05 1946-04-24 Improvements in and relating to acoustic instruments, such as loud speakers and directional microphones Expired GB611179A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR611179X 1939-04-05
FR611329X 1943-10-07

Publications (1)

Publication Number Publication Date
GB611179A true GB611179A (en) 1948-10-26

Family

ID=26214733

Family Applications (2)

Application Number Title Priority Date Filing Date
GB12391/46A Expired GB611179A (en) 1939-04-05 1946-04-24 Improvements in and relating to acoustic instruments, such as loud speakers and directional microphones
GB12515/46A Expired GB611329A (en) 1939-04-05 1946-04-25 Improvements in or relating to acoustic instruments such as loud speakers and directional microphones

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB12515/46A Expired GB611329A (en) 1939-04-05 1946-04-25 Improvements in or relating to acoustic instruments such as loud speakers and directional microphones

Country Status (1)

Country Link
GB (2) GB611179A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3327113A1 (en) * 1982-02-17 1985-02-07 Emhart Industries, Inc., Indianapolis, Ind. SPEAKER ARRANGEMENT

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10008323A1 (en) * 1999-02-17 2000-08-31 Vifa Speak A S Videbaek speaker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3327113A1 (en) * 1982-02-17 1985-02-07 Emhart Industries, Inc., Indianapolis, Ind. SPEAKER ARRANGEMENT

Also Published As

Publication number Publication date
GB611329A (en) 1948-10-28

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