GB308801A - Improvements in sound reproducing apparatus, such as loud-speaking telephonic receivers - Google Patents

Improvements in sound reproducing apparatus, such as loud-speaking telephonic receivers

Info

Publication number
GB308801A
GB308801A GB9540/29A GB954029A GB308801A GB 308801 A GB308801 A GB 308801A GB 9540/29 A GB9540/29 A GB 9540/29A GB 954029 A GB954029 A GB 954029A GB 308801 A GB308801 A GB 308801A
Authority
GB
United Kingdom
Prior art keywords
loud
diaphragm
reproducing apparatus
sound reproducing
speaking
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
GB9540/29A
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.)
FRANCOIS XAVIER LOUIS HENRY MA
Original Assignee
FRANCOIS XAVIER LOUIS HENRY MA
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 FRANCOIS XAVIER LOUIS HENRY MA filed Critical FRANCOIS XAVIER LOUIS HENRY MA
Publication of GB308801A publication Critical patent/GB308801A/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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

Abstract

308,801. Bonnier, F.-X. L. H. M. G. March 31, 1928, [Convention date]. Loud-speakers; diaphragms.-The diaphragm 1 of a loud-speaher is acoustically connected to an adjustable resonator 3 having a further resilient diaphragm 2. The volume of the resonator may be adjusted by means of a drum 5 having a resilient face and actuated by a screw 6. The diaphragm 2 may be of glass, metal, wood, paper, cardboard, skin, &c., covered with thin rubber sheet 7, and may be paraboloidal, the space between it and the loud-speaker diaphragm, which may be similarly covered, being lined with felt or other sound-absorbent material.
GB9540/29A 1928-04-28 1929-03-25 Improvements in sound reproducing apparatus, such as loud-speaking telephonic receivers Expired GB308801A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR35699T 1928-04-28

Publications (1)

Publication Number Publication Date
GB308801A true GB308801A (en) 1930-08-25

Family

ID=8672546

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9540/29A Expired GB308801A (en) 1928-04-28 1929-03-25 Improvements in sound reproducing apparatus, such as loud-speaking telephonic receivers

Country Status (2)

Country Link
FR (2) FR666804A (en)
GB (1) GB308801A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2993091A (en) * 1957-04-02 1961-07-18 Guss Reuben Variable dynamic infinite damping loudspeaker enclosure device
GB2181620A (en) * 1985-10-11 1987-04-23 Zbigniew Marian Zenkteler Loudspeaker enclosure
GB2245798A (en) * 1990-06-29 1992-01-08 Tsao Ye Ming Extensible acoustic enclosure
GB2323999A (en) * 1997-04-05 1998-10-07 Manhar Amlani Variable volume enclosure for a sounder
GB2414619A (en) * 2004-05-24 2005-11-30 Blast Loudspeakers Ltd Loudspeaker with parabolic or catenary shaped dome

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2371846A1 (en) * 1976-09-14 1978-06-16 Estoueig Pierre Reflective acoustic wall member - enables reflected sound waves to enhance incident sound waves while absorbing undesirable reflections in damping material
AT373754B (en) * 1982-04-08 1984-02-27 Akg Akustische Kino Geraete MEMBRANE FOR MICROPHONES

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2993091A (en) * 1957-04-02 1961-07-18 Guss Reuben Variable dynamic infinite damping loudspeaker enclosure device
GB2181620A (en) * 1985-10-11 1987-04-23 Zbigniew Marian Zenkteler Loudspeaker enclosure
GB2181620B (en) * 1985-10-11 1989-09-13 Zbigniew Marian Zenkteler Loudspeaker enclosures
GB2245798A (en) * 1990-06-29 1992-01-08 Tsao Ye Ming Extensible acoustic enclosure
GB2245798B (en) * 1990-06-29 1994-06-15 Tsao Ye Ming Extensible acoustic enclosure
GB2323999A (en) * 1997-04-05 1998-10-07 Manhar Amlani Variable volume enclosure for a sounder
GB2414619A (en) * 2004-05-24 2005-11-30 Blast Loudspeakers Ltd Loudspeaker with parabolic or catenary shaped dome
US8630440B2 (en) 2004-05-24 2014-01-14 Blast Loudspeakers Ltd. Loudspeakers

Also Published As

Publication number Publication date
FR35699E (en) 1930-03-27
FR666804A (en) 1929-10-07

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