GB274532A - Improvements in or relating to acoustic amplifiers and radiators suitable for use with loud speaking telephonic receivers and other sound producing or reproducing apparatus - Google Patents

Improvements in or relating to acoustic amplifiers and radiators suitable for use with loud speaking telephonic receivers and other sound producing or reproducing apparatus

Info

Publication number
GB274532A
GB274532A GB4945/26A GB494526A GB274532A GB 274532 A GB274532 A GB 274532A GB 4945/26 A GB4945/26 A GB 4945/26A GB 494526 A GB494526 A GB 494526A GB 274532 A GB274532 A GB 274532A
Authority
GB
United Kingdom
Prior art keywords
relating
reproducing apparatus
graham
conduit
sound producing
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
GB4945/26A
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.)
Individual
Original Assignee
Individual
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 BE333006D priority Critical patent/BE333006A/xx
Priority to BE338918D priority patent/BE338918A/xx
Priority to GB8628/25A priority patent/GB257639A/en
Application filed by Individual filed Critical Individual
Priority to GB4945/26A priority patent/GB274532A/en
Priority to FR613219D priority patent/FR613219A/en
Priority to DE1926G0066852 priority patent/DE522363C/en
Priority to US156967A priority patent/US1678214A/en
Priority to FR626769D priority patent/FR626769A/en
Publication of GB274532A publication Critical patent/GB274532A/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)

Abstract

274,532. Graham, M., and Graham, A., (Representatives of Graham, E. A.). Feb. 20, 1926. Addition to 257,639. Loud - speakers.- In a device comprising multiple reflecting surfaces, sound from a conduit 2 is reflected by a concave reflector 1 and is then further reflected and diffused through the outlet 10 by one or more flat reflecting surfaces 4, 5. The axis of the concave surface 1 may, as shown in Fig. 3, be coincident with the axis of the conduit 2 or may be rearwardly inclined as shown in Fig. 7 and in this case the mouth 2<a> of the conduit may be bent as shown. The structure 1, 2, 4, 5 may be provided with top and bottom flat walls, the whole being fitted into a cabinet 8, or, alternatively, the top and bottom walls of the casing may themselves serve as upper and lower walls of the reflecting chamber. The surface 1 may be straight in vertical section or may be part of a surface of revolution. The space between the reflecting chamber and the cabinet 8 may be filled with non-sonorous material such as cotton wool to reduce resonance.
GB4945/26A 1925-03-31 1926-02-20 Improvements in or relating to acoustic amplifiers and radiators suitable for use with loud speaking telephonic receivers and other sound producing or reproducing apparatus Expired GB274532A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
BE333006D BE333006A (en) 1926-02-20
BE338918D BE338918A (en) 1926-02-20
GB8628/25A GB257639A (en) 1926-02-20 1925-03-31 Improvements in or relating to acoustic amplifiers and radiators suitable for use with loud speaking telephonic receivers and other sound producing or reproducing apparatus
GB4945/26A GB274532A (en) 1926-02-20 1926-02-20 Improvements in or relating to acoustic amplifiers and radiators suitable for use with loud speaking telephonic receivers and other sound producing or reproducing apparatus
FR613219D FR613219A (en) 1926-02-20 1926-03-22 Improvements in amplifiers and acoustic radiation devices designed for use with telephone receivers, loudspeakers and other sound producing or reproducing devices
DE1926G0066852 DE522363C (en) 1925-03-31 1926-03-27 Device for acoustic amplification in connection with loudspeakers
US156967A US1678214A (en) 1926-02-20 1926-12-24 Acoustic amplifier and radiator
FR626769D FR626769A (en) 1926-02-20 1926-12-27 Improvements to acoustic amplifiers and diffusers suitable for use with loudspeaker telephone receivers and other sound producing or reproducing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4945/26A GB274532A (en) 1926-02-20 1926-02-20 Improvements in or relating to acoustic amplifiers and radiators suitable for use with loud speaking telephonic receivers and other sound producing or reproducing apparatus

Publications (1)

Publication Number Publication Date
GB274532A true GB274532A (en) 1927-07-20

Family

ID=9786809

Family Applications (2)

Application Number Title Priority Date Filing Date
GB8628/25A Expired GB257639A (en) 1925-03-31 1925-03-31 Improvements in or relating to acoustic amplifiers and radiators suitable for use with loud speaking telephonic receivers and other sound producing or reproducing apparatus
GB4945/26A Expired GB274532A (en) 1925-03-31 1926-02-20 Improvements in or relating to acoustic amplifiers and radiators suitable for use with loud speaking telephonic receivers and other sound producing or reproducing apparatus

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB8628/25A Expired GB257639A (en) 1925-03-31 1925-03-31 Improvements in or relating to acoustic amplifiers and radiators suitable for use with loud speaking telephonic receivers and other sound producing or reproducing apparatus

Country Status (4)

Country Link
US (1) US1678214A (en)
BE (2) BE338918A (en)
FR (2) FR613219A (en)
GB (2) GB257639A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2816619A (en) * 1951-12-04 1957-12-17 John E Karlson Acoustic transducers

Also Published As

Publication number Publication date
FR613219A (en) 1926-11-12
GB257639A (en) 1926-08-31
BE333006A (en)
FR626769A (en) 1927-09-19
BE338918A (en)
US1678214A (en) 1928-07-24

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