GB273498A - Improvements in and relating to loud-speaking telephonic receivers - Google Patents

Improvements in and relating to loud-speaking telephonic receivers

Info

Publication number
GB273498A
GB273498A GB1726926A GB1726926A GB273498A GB 273498 A GB273498 A GB 273498A GB 1726926 A GB1726926 A GB 1726926A GB 1726926 A GB1726926 A GB 1726926A GB 273498 A GB273498 A GB 273498A
Authority
GB
United Kingdom
Prior art keywords
loud
relating
ferranti
speaking
telephonic receivers
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
GB1726926A
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.)
Ferranti International PLC
Original Assignee
Ferranti PLC
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 Ferranti PLC filed Critical Ferranti PLC
Priority to GB1726926A priority Critical patent/GB273498A/en
Publication of GB273498A publication Critical patent/GB273498A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/02—Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators
    • G10K11/025—Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators horns for impedance matching

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Electromechanical Clocks (AREA)

Abstract

273,498. Ferranti, S. Z. de, and Ferranti, Ltd. July 9, 1926. Loud-speakers. - A loud-speaker unit includes a vertically disposed horn a with a conoidal reflector b extending inwardly from the mouth, so that the sound waves are radiated substantially in a horizontal plane, and the area of the annular section f increases exponentially with the axial length. The unit is supported by legs h.
GB1726926A 1926-07-09 1926-07-09 Improvements in and relating to loud-speaking telephonic receivers Expired GB273498A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1726926A GB273498A (en) 1926-07-09 1926-07-09 Improvements in and relating to loud-speaking telephonic receivers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1726926A GB273498A (en) 1926-07-09 1926-07-09 Improvements in and relating to loud-speaking telephonic receivers

Publications (1)

Publication Number Publication Date
GB273498A true GB273498A (en) 1927-07-07

Family

ID=10092218

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1726926A Expired GB273498A (en) 1926-07-09 1926-07-09 Improvements in and relating to loud-speaking telephonic receivers

Country Status (1)

Country Link
GB (1) GB273498A (en)

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