GB1070186A - Loudspeaker enclosure - Google Patents

Loudspeaker enclosure

Info

Publication number
GB1070186A
GB1070186A GB43342/64A GB4334264A GB1070186A GB 1070186 A GB1070186 A GB 1070186A GB 43342/64 A GB43342/64 A GB 43342/64A GB 4334264 A GB4334264 A GB 4334264A GB 1070186 A GB1070186 A GB 1070186A
Authority
GB
United Kingdom
Prior art keywords
sub
enclosure
diaphragm
wall
loud
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
GB43342/64A
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Publication of GB1070186A publication Critical patent/GB1070186A/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
    • H04R1/2884—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of the enclosure structure, i.e. strengthening or shape of the enclosure
    • H04R1/2888—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of the enclosure structure, i.e. strengthening or shape of the enclosure for loudspeaker transducers
    • 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
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/283—Enclosures comprising vibrating or resonating arrangements using a passive diaphragm
    • H04R1/2834—Enclosures comprising vibrating or resonating arrangements using a passive diaphragm 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)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

1,070,186. Loud-speakers. SONY CORPORATION. Oct. 23, 1964 [Oct. 25, 1963], No. 43342/64. Headings H4J and H4X. A loud-speaker enclosure has front, side and rear walls and a mounting position for a loudspeaker on the front wall. A side wall has at least a portion thereof formed as a subdiaphragm having a mechanical resonance corresponding to a portion of the frequency spectrum for which emphasis is desired. An enclosure 1, Figs. 1, 2, has front and rear panels 2, 3 formed of relatively rigid polyvinyl chloride plates and its four side walls 4, 5, 6 etc., formed as sub-diaphragm panels of polyvinyl chloride, polyethylene foam or propylene in the form of membranes. An air-tight casing is provided when the loudspeaker 9 is mounted on the panel 2. Each sub-diaphragm is damped by a coating of synthetic rubber adhesive. The front and rear panels 2, 3 are secured together by cross-bars 13 and a polyurethane elastic member (14), Fig. 5a (not shown), is centrally located between each sub-diaphragm and its adjacent cross-bar 13. Glass fibre (15) covers the rear panel 3. Sound waves produced by the sub-diaphragms have a velocity at right angles to the principal axis of the loud-speaker, see Fig. 1, and reinforce the response of the system. The sub-daphragms have resonance peaks of low sharpness, at approximately 500 c/s., and are utilized to give an overall system response which is relatively uniform to below 200c/s. when using an enclosure of 13 cm. x 13 cm. x 8 cm. The enclosure may be mounted in the corner of a room, but the best low frequency response is obtained by placing the rear of the enclosure against a first wall close to a corner so that one sub-diaphragm is spaced from but close to a wall adjacent the first wall. An alternative enclosure (Fig. 10, not shown) has relatively rigid side walls (26) which contain drone cones (22, 23, 24, 25) having a natural resonant frequency of about 500 c/s. In other arrangements (Figs. 11, 12, not shown) the front and rear walls are relatively rigid and the connecting wall (27) forms a sub-diaphragm which is circular or elliptical in cross-section.
GB43342/64A 1963-10-25 1964-10-23 Loudspeaker enclosure Expired GB1070186A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5705163 1963-10-25

Publications (1)

Publication Number Publication Date
GB1070186A true GB1070186A (en) 1967-06-01

Family

ID=13044631

Family Applications (1)

Application Number Title Priority Date Filing Date
GB43342/64A Expired GB1070186A (en) 1963-10-25 1964-10-23 Loudspeaker enclosure

Country Status (3)

Country Link
US (1) US3240289A (en)
DE (1) DE1437462A1 (en)
GB (1) GB1070186A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3580988A (en) * 1969-08-12 1971-05-25 Ampex Grommet for speaker enclosure
GB2283150A (en) * 1995-01-04 1995-04-26 B & W Loudspeakers Loudspeaker systems
GB2344248A (en) * 1998-11-24 2000-05-31 B & W Loudspeakers Auxiliary bass radiator unit for mounting in an aperture in a loudspeaker enclosure.

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3329898A (en) * 1964-10-30 1967-07-04 Itt Cabinet having wall containing strip line for microwave communication system
US3727719A (en) * 1969-06-19 1973-04-17 S Yando Sound reproducing system
US3848090A (en) * 1971-11-18 1974-11-12 J Walker Wall hanging speaker system
US3953675A (en) * 1972-05-08 1976-04-27 Babbco, Ltd. Audio speaker system
US3780824A (en) * 1972-08-14 1973-12-25 G Prince Acoustic loading system
AU2342177A (en) * 1976-03-22 1978-09-21 Babbco Ltd Loudspeaker. ribbed cone and bearing supported voice coil
JPS5330296A (en) * 1976-09-01 1978-03-22 Seiko Instr & Electronics Ltd Electro-acoustic transducer
US4168762A (en) * 1978-01-13 1979-09-25 Amanita Sound, Inc. Loudspeaker enclosure
FR2607992A1 (en) * 1986-12-08 1988-06-10 Legrand Bernard Electro-acoustic device

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1787946A (en) * 1925-05-14 1931-01-06 Victor Talking Machine Co Means for converting electrical vibrations into sound waves
US1988250A (en) * 1934-02-17 1935-01-15 Rca Corp Loud speaker and method of propagating sound
US2059929A (en) * 1935-06-17 1936-11-03 Philco Radio & Television Corp Sound reproducing apparatus
US2549091A (en) * 1946-10-25 1951-04-17 Bell Telephone Labor Inc Diaphragm for electroacoustic transducers
US2646853A (en) * 1948-11-11 1953-07-28 Int Standard Electric Corp Compliant supports for transducer diaphragms
US3082839A (en) * 1959-03-27 1963-03-26 Joseph E Whitcas High-fidelity loudspeaker system
US3101810A (en) * 1959-07-08 1963-08-27 Allied Instructional Developme Loudspeaker resonator

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3580988A (en) * 1969-08-12 1971-05-25 Ampex Grommet for speaker enclosure
GB2283150A (en) * 1995-01-04 1995-04-26 B & W Loudspeakers Loudspeaker systems
GB2344248A (en) * 1998-11-24 2000-05-31 B & W Loudspeakers Auxiliary bass radiator unit for mounting in an aperture in a loudspeaker enclosure.
US6396936B1 (en) 1998-11-24 2002-05-28 B&W Loudspeaker Limited Auxiliary bass radiator units
GB2344248B (en) * 1998-11-24 2003-06-04 B & W Loudspeakers Auxiliary bass radiator units

Also Published As

Publication number Publication date
US3240289A (en) 1966-03-15
DE1437462A1 (en) 1968-10-17

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