GB265662A - Improvements in loud speaking telephonic apparatus - Google Patents

Improvements in loud speaking telephonic apparatus

Info

Publication number
GB265662A
GB265662A GB2704825A GB2704825A GB265662A GB 265662 A GB265662 A GB 265662A GB 2704825 A GB2704825 A GB 2704825A GB 2704825 A GB2704825 A GB 2704825A GB 265662 A GB265662 A GB 265662A
Authority
GB
United Kingdom
Prior art keywords
reflector
graham
sound
telephonic apparatus
conduits
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
GB2704825A
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
Application filed by Individual filed Critical Individual
Priority to GB2704825A priority Critical patent/GB265662A/en
Publication of GB265662A publication Critical patent/GB265662A/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

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

265,662. Graham, M., and Graham, A., (Representatives of Graham, E. A.). Oct. 28, 1925. Loud-speakers comprise a plurality of telephone receivers 1, 1<a> each responsive to a different band of frequencies, and a reflector 2 towards which the sound from each receiver is separately directed. The sound is directed by sound conduits 3, 4 differing in length and taper. The conduits are, for the most part, confined within or behind the reflector and within the confines of a surface or surfaces formed by extending the boundary of the reflector at right-angles to the plane containing the outlet of the reflector. Specifications 15369/15, 251,365, and 252,053, [Class 13, Bells &c.], are referred to.
GB2704825A 1925-10-28 1925-10-28 Improvements in loud speaking telephonic apparatus Expired GB265662A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2704825A GB265662A (en) 1925-10-28 1925-10-28 Improvements in loud speaking telephonic apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2704825A GB265662A (en) 1925-10-28 1925-10-28 Improvements in loud speaking telephonic apparatus

Publications (1)

Publication Number Publication Date
GB265662A true GB265662A (en) 1927-01-28

Family

ID=10253309

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2704825A Expired GB265662A (en) 1925-10-28 1925-10-28 Improvements in loud speaking telephonic apparatus

Country Status (1)

Country Link
GB (1) GB265662A (en)

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