GB716801A - Acoustic duct for electro-acoustic transducer - Google Patents

Acoustic duct for electro-acoustic transducer

Info

Publication number
GB716801A
GB716801A GB2594951A GB2594951A GB716801A GB 716801 A GB716801 A GB 716801A GB 2594951 A GB2594951 A GB 2594951A GB 2594951 A GB2594951 A GB 2594951A GB 716801 A GB716801 A GB 716801A
Authority
GB
United Kingdom
Prior art keywords
acoustic
electro
tube
duct
transducer
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
GB2594951A
Inventor
James Samuel Paterso Robertson
Edwin John Shelton
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.)
STC PLC
Original Assignee
Standard Telephone and Cables 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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB2594951A priority Critical patent/GB716801A/en
Publication of GB716801A publication Critical patent/GB716801A/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
    • H04R1/08—Mouthpieces; Microphones; Attachments therefor
    • H04R1/083—Special constructions of mouthpieces

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)

Abstract

716,801. Tubes. STANDARD TELEPHONES & CABLES, Ltd. Oct. 24, 1952 [Nov. 6, 1951], No. 25949/51. Class 99 (2). [Also in Groups XXXVIII, XXXIX and XL (b)] A telephone operator's headset comprises a flexible acoustic tube leading to a microphone. The tube comprises a number of hollow nesting segments 1 of polythene held frictionally together by a helical spring 7 so that the tube will remain in adjusted position.
GB2594951A 1951-11-06 1951-11-06 Acoustic duct for electro-acoustic transducer Expired GB716801A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2594951A GB716801A (en) 1951-11-06 1951-11-06 Acoustic duct for electro-acoustic transducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2594951A GB716801A (en) 1951-11-06 1951-11-06 Acoustic duct for electro-acoustic transducer

Publications (1)

Publication Number Publication Date
GB716801A true GB716801A (en) 1954-10-13

Family

ID=10235944

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2594951A Expired GB716801A (en) 1951-11-06 1951-11-06 Acoustic duct for electro-acoustic transducer

Country Status (1)

Country Link
GB (1) GB716801A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2149049A (en) * 1983-11-02 1985-06-05 Graham Major A shape-retaining insert for a flexible hose
GB2151114A (en) * 1983-12-02 1985-07-10 Plantronics Voice tube assemblies for post-auricle headsets

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2149049A (en) * 1983-11-02 1985-06-05 Graham Major A shape-retaining insert for a flexible hose
GB2151114A (en) * 1983-12-02 1985-07-10 Plantronics Voice tube assemblies for post-auricle headsets
US4617431A (en) * 1983-12-02 1986-10-14 Plantronics, Inc. Voice tube assemblies for post-auricle headsets

Similar Documents

Publication Publication Date Title
GB670868A (en) A filter for sound vibrations and a microphone and telephone provided therewith
GB716801A (en) Acoustic duct for electro-acoustic transducer
GB742889A (en) Improvements in or relating to loud speakers and like electro-acoustic transducers
CA609908A (en) Tone controlled telephone answering device
GB832113A (en) Improvements in hearing apparatus
GB1042146A (en) Improved telephonic apparatus
GB716055A (en) Improvements in and relating to sound reproduction
GB469322A (en) Sound locating apparatus
JPS5221710A (en) Voice signal transmitter
ES287657A1 (en) Telephone apparatus (Machine-translation by Google Translate, not legally binding)
GB773912A (en) Improvements in or relating to operator's telephone headsets
GB1016716A (en) Improvements relating to electro-acoustic transducers
GB984889A (en) Improvements in or relating to electro-acoustic transducers
GB622828A (en) Improvements in or relating to loudspeakers and like electro-acoustic transducers
CA491419A (en) Loud speaking telephone set
GB758737A (en) Improvements in and relating to telephone apparatus
AU156801B2 (en) Acoustic duct for electroacoustic transducer
GB729620A (en) An acoustic device with an inverted horn having a throat vented to the atmosphere
GB782966A (en) Telephone handset with extensions for providing privacy to the user
CA496894A (en) Finger-wheel operated call transmitter
GB631861A (en) Improvements in or relating to loud speakers
AU275192B2 (en) Telephone transducer operable as microphone and tone sounder
AU1384352A (en) Acoustic duct for electroacoustic transducer
CA498509A (en) Electroacoustic transducers
CA496187A (en) Electroacoustic transducers