GB479549A - Improvements in loud speaker arrangements for public address systems - Google Patents

Improvements in loud speaker arrangements for public address systems

Info

Publication number
GB479549A
GB479549A GB31870/36A GB3187036A GB479549A GB 479549 A GB479549 A GB 479549A GB 31870/36 A GB31870/36 A GB 31870/36A GB 3187036 A GB3187036 A GB 3187036A GB 479549 A GB479549 A GB 479549A
Authority
GB
United Kingdom
Prior art keywords
loud
speakers
sound
speaker
public address
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
GB31870/36A
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.)
Telefunken AG
Original Assignee
Telefunken AG
Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
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 Telefunken AG, Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH filed Critical Telefunken AG
Publication of GB479549A publication Critical patent/GB479549A/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
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/26—Spatial arrangements of separate transducers responsive to two or more frequency ranges
    • 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)
  • Stereophonic System (AREA)

Abstract

479,549. Loud-speakers. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE. Nov. 20, 1936, No. 31870. Convention date, Dec. 16, 1935. [Class 40 (iv)] A loud-speaker unit for public address systems comprises a main loud-speaker arranged so that sound is emitted initially in a vertical direction and is reflected by the surfaces of deflecting members so that it is propagated in all directions radially together with several additional loud-speakers radiating the high frequency sounds direct to the listener and located in, or adjacent the mouth of, the sound passage formed by the deflecting members, or above or below the sound-deflecting members. Sound from a large diaphragm loud-speaker 1 passes through a passage constituted by a curved surface 3 formed in a housing 2 and the lower surface of a deflecting member 4. The loud-speakers 5 for transmitting the higher frequencies are equiangularly arranged in the lower part of the housing. The axes of the loud-speakers 5 are adjustable and are preferably inclined slightly towards the ground. Conical or V-shaped deflectors may be located between the loud-speakers 5.
GB31870/36A 1935-12-16 1936-11-20 Improvements in loud speaker arrangements for public address systems Expired GB479549A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE479549X 1935-12-16

Publications (1)

Publication Number Publication Date
GB479549A true GB479549A (en) 1938-02-08

Family

ID=6542427

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31870/36A Expired GB479549A (en) 1935-12-16 1936-11-20 Improvements in loud speaker arrangements for public address systems

Country Status (2)

Country Link
FR (1) FR814659A (en)
GB (1) GB479549A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2544742A (en) * 1946-12-31 1951-03-13 Vibra Sonic Inc Cubic loud-speaker cabinet
GB2269960A (en) * 1992-08-20 1994-02-23 Canon Audio Ltd Sound output system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1086464B (en) * 1977-09-06 1985-05-28 Selmin Sas METHOD AND DEVICES FOR OMNIDIRECTIONAL IRRADIATION OF SOUND WAVES

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2544742A (en) * 1946-12-31 1951-03-13 Vibra Sonic Inc Cubic loud-speaker cabinet
GB2269960A (en) * 1992-08-20 1994-02-23 Canon Audio Ltd Sound output system
EP0584971A2 (en) * 1992-08-20 1994-03-02 Canon Audio Limited Sound output system
EP0584971A3 (en) * 1992-08-20 1994-09-07 Canon Audio Ltd Sound output system
US5402502A (en) * 1992-08-20 1995-03-28 Canon Audio Limited Sound output system
GB2269960B (en) * 1992-08-20 1996-03-27 Canon Audio Ltd Sound output system

Also Published As

Publication number Publication date
FR814659A (en) 1937-06-28

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