GB903995A - Improvements in or relating to loudspeaker enclosures - Google Patents

Improvements in or relating to loudspeaker enclosures

Info

Publication number
GB903995A
GB903995A GB2858258A GB2858258A GB903995A GB 903995 A GB903995 A GB 903995A GB 2858258 A GB2858258 A GB 2858258A GB 2858258 A GB2858258 A GB 2858258A GB 903995 A GB903995 A GB 903995A
Authority
GB
United Kingdom
Prior art keywords
loud
damping unit
speaker
sept
cabinet
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
GB2858258A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries 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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB903995A publication Critical patent/GB903995A/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
    • 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
    • H04R1/2815—Enclosures comprising vibrating or resonating arrangements of the bass reflex type
    • H04R1/2819—Enclosures comprising vibrating or resonating arrangements of the bass reflex type for loudspeaker transducers

Abstract

903,995. Loud-speaker enclosures. PHILIPS ELECTRICAL INDUSTRIES Ltd. Sept. 5, 1958 [Sept. 10, 1957], No. 28582/58. Class 40 (4). A loud-speaker enclosure includes at least one damping unit (Fig. 4) comprising a primary enclosure having at least one unrestricted aperture 13 in a side or rear wall communicating with a secondary enclosure in the form of a cabinet. Each damping unit has acoustic resistance material 21 at its rear wall and if more than one unit is used the respective units are designed to be effective at different resonance points of the loud-speaker system and are fitted one inside the other as shown in Fig. 5. A preferred embodiment (Figs. 9 and 10) has the cabinet in two parts 23, 24 with the damping unit in the former part with its aperture at 22. Strengthening ribs 27 are fitted, the holes shown in the horizontal ribs being provided to enable screw bolts (not shown) to hold the two parts together.
GB2858258A 1957-09-10 1958-09-05 Improvements in or relating to loudspeaker enclosures Expired GB903995A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL220671 1957-09-10

Publications (1)

Publication Number Publication Date
GB903995A true GB903995A (en) 1962-08-22

Family

ID=19750975

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2858258A Expired GB903995A (en) 1957-09-10 1958-09-05 Improvements in or relating to loudspeaker enclosures

Country Status (2)

Country Link
CH (1) CH383445A (en)
GB (1) GB903995A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3247926A (en) * 1964-09-14 1966-04-26 Edwin G Warman Loud-speaker enclosure
US3317000A (en) * 1966-02-01 1967-05-02 Stephen L Heidrich Electroacoustic transducer
FR2418990A1 (en) * 1978-03-03 1979-09-28 Brothier Laboratoires Two chamber loudspeaker enclosure - has flexible sheet partition initially variable in position to optimise frequency characteristics
FR2549333A1 (en) * 1983-07-13 1985-01-18 Link Gerard Passive simulator of infinite load.

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2218496C3 (en) * 1972-04-17 1983-12-08 Hans-Joachim 3300 Braunschweig Gieger Cabinet speakers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3247926A (en) * 1964-09-14 1966-04-26 Edwin G Warman Loud-speaker enclosure
US3317000A (en) * 1966-02-01 1967-05-02 Stephen L Heidrich Electroacoustic transducer
FR2418990A1 (en) * 1978-03-03 1979-09-28 Brothier Laboratoires Two chamber loudspeaker enclosure - has flexible sheet partition initially variable in position to optimise frequency characteristics
FR2549333A1 (en) * 1983-07-13 1985-01-18 Link Gerard Passive simulator of infinite load.

Also Published As

Publication number Publication date
CH383445A (en) 1964-10-31

Similar Documents

Publication Publication Date Title
GB846591A (en) Loud speaker baffle having improved low frequency reproduction characteristics
GB903995A (en) Improvements in or relating to loudspeaker enclosures
GB873512A (en) Improvements in or relating to transducers
GB1147810A (en) Loud speaker assembly
GB841440A (en) Improvements in or relating to loudspeakers
GB829214A (en) Improvements in loud speaker systems
GB757021A (en) Improvements in or relating to loudspeaker mountings
GB876428A (en) Improvements in or relating to loudspeaker diaphragms
GB854851A (en) Improvements in or relating to loudspeakers
GB980067A (en) Improvements in or relating to reverberatory loudspeakers
GB859035A (en) Improvements in screens or privacy partitions for desks and like articles
GB830249A (en) Improvements in or relating to electrical equipments
GB847954A (en) Improvements in or relating to loudspeaker cabinets
GB878933A (en) Instructional apparatus
GB820307A (en) Improvements in or relating to loudspeaker enclosures
CA581435A (en) Speaker cabinet
CA590446A (en) Loudspeaker enclosure with resonator
GB830020A (en) Improvements in or relating to sound reproducing devices
CA570082A (en) Loudspeaker cabinets
GB1082931A (en) Improvements in or relating to loudspeaker enclosures
CA564275A (en) Cellulose slurry-steeping with an added surfactant
CA561100A (en) Laminated fibrous batt and manufacture thereof
CA524025A (en) Emulsifying and dispersing agents
CA517144A (en) Circuit breaker enclosures and mountings
AU232065B2 (en) Improvements in or relating to loudspeaker enclosures