GB483745A - Improvements in cabinets for sound reproducing instruments - Google Patents

Improvements in cabinets for sound reproducing instruments

Info

Publication number
GB483745A
GB483745A GB2935036A GB2935036A GB483745A GB 483745 A GB483745 A GB 483745A GB 2935036 A GB2935036 A GB 2935036A GB 2935036 A GB2935036 A GB 2935036A GB 483745 A GB483745 A GB 483745A
Authority
GB
United Kingdom
Prior art keywords
cabinet
sheet
sheets
loud
distance
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
GB2935036A
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.)
GEORGE STANLEY BRAYSHAW
Murphy Radio Ltd
Original Assignee
GEORGE STANLEY BRAYSHAW
Murphy Radio Ltd
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 GEORGE STANLEY BRAYSHAW, Murphy Radio Ltd filed Critical GEORGE STANLEY BRAYSHAW
Priority to GB2935036A priority Critical patent/GB483745A/en
Publication of GB483745A publication Critical patent/GB483745A/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 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2869—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself
    • H04R1/2876—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of damping material, e.g. as cladding
    • H04R1/288—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of damping material, e.g. as cladding for loudspeaker transducers

Landscapes

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

Abstract

483,745. Loud-speakers. MURPHY RADIO, Ltd., and BRAYSHAW, G. S. Oct. 28, 1936, No. 29350. [Class 40 (iv)] A cabinet for a loud-speaker has a sheet of sound-absorbent material placed mid-way between the front and back of the cabinet in order to diminish the resonance of the air column within the cabinet. In the construction shown, the sheet 5 located between the front 1 and rear of the cabinet is supplemented by a sheet 8 parallel to and midway between the top 6 and bottom 7 and by a further sheet 9 disposed midway between the side walls. The sheets are cut away to accommodate the diaphragm 3 and its operating mechanism 4. Sheets may also be placed at the positions of the velocity antinodes of vibrations corresponding to harmonies of the fundamental resonances. In the case of a normally openended cabinet, sheets may be placed at the open-end and at a distance from the closed end equal to one third of the distance between the open and closed ends of the cabinet.
GB2935036A 1936-10-28 1936-10-28 Improvements in cabinets for sound reproducing instruments Expired GB483745A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2935036A GB483745A (en) 1936-10-28 1936-10-28 Improvements in cabinets for sound reproducing instruments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2935036A GB483745A (en) 1936-10-28 1936-10-28 Improvements in cabinets for sound reproducing instruments

Publications (1)

Publication Number Publication Date
GB483745A true GB483745A (en) 1938-04-26

Family

ID=10290136

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2935036A Expired GB483745A (en) 1936-10-28 1936-10-28 Improvements in cabinets for sound reproducing instruments

Country Status (1)

Country Link
GB (1) GB483745A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2975852A (en) * 1954-01-05 1961-03-21 Chave Donald Maynard Loudspeakers
US3132712A (en) * 1960-01-04 1964-05-12 Wilbur L Maddy Loud-speaker enclosure
EP0191595A2 (en) * 1985-02-09 1986-08-20 B & W Loudspeakers Limited Improvements in or relating to loudspeaker enclosures
US5117463A (en) * 1989-03-14 1992-05-26 Pioneer Electronic Corporation Speaker system having directivity
US6896096B2 (en) 2000-07-21 2005-05-24 B&W Loudspeakers Limited Acoustic structures

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2975852A (en) * 1954-01-05 1961-03-21 Chave Donald Maynard Loudspeakers
US3132712A (en) * 1960-01-04 1964-05-12 Wilbur L Maddy Loud-speaker enclosure
EP0191595A2 (en) * 1985-02-09 1986-08-20 B & W Loudspeakers Limited Improvements in or relating to loudspeaker enclosures
US4690244A (en) * 1985-02-09 1987-09-01 B & W Loudspeakers Limited Loudspeaker enclosures
EP0191595A3 (en) * 1985-02-09 1988-11-30 B & W Loudspeakers Limited Improvements in or relating to loudspeaker enclosures
US5117463A (en) * 1989-03-14 1992-05-26 Pioneer Electronic Corporation Speaker system having directivity
US6896096B2 (en) 2000-07-21 2005-05-24 B&W Loudspeakers Limited Acoustic structures

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