GB434563A - Improvements in and relating to baffles and containers for loud speakers - Google Patents

Improvements in and relating to baffles and containers for loud speakers

Info

Publication number
GB434563A
GB434563A GB2327834A GB2327834A GB434563A GB 434563 A GB434563 A GB 434563A GB 2327834 A GB2327834 A GB 2327834A GB 2327834 A GB2327834 A GB 2327834A GB 434563 A GB434563 A GB 434563A
Authority
GB
United Kingdom
Prior art keywords
box
layers
air
rear wall
turner
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
GB2327834A
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.)
HARTLEY TURNER RADIO Ltd
Original Assignee
HARTLEY TURNER 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 HARTLEY TURNER RADIO Ltd filed Critical HARTLEY TURNER RADIO Ltd
Priority to GB2327834A priority Critical patent/GB434563A/en
Publication of GB434563A publication Critical patent/GB434563A/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)
  • Building Environments (AREA)

Abstract

434,563. Loud - speakers. TURNER, P. K., 73, Osborne Road, Windsor, Berkshire, and HARTLEY TURNER RADIO, Ltd., Dome Buildings, The Square, Richmond, Surrey. Aug. 13, 1934, No. 23278. [Class 40 (iv)] For preventing interference between the waves from the two sides of a diaphragm of the order of 1 ft. or less in diameter and for eliminating box resonance, the rear of the diaphragm is acoustically enclosed by a series of air-spaced layers of sound-absorbent material, some or all of which have openings. As shown, sheets 42, Fig. 4, of gamgee tissue or cotton wool are clamped between light wooden frames 41 and against a fillet 44 in the box 43 so as to be compressed between adjacent frames and also between each frame and the walls of the box. The layers 15, Fig. 1, are cut away to receive the body of the loudspeaker 11, and to form an air cavity 16 of diameter decreasing progressively towards the rear of the box. The rear wall of the box may be dispensed with, and if the sound waves are absorbed before reaching the margins of the layers, a box is unnecessary. In a modification, Fig. 2 (not shown), the rear wall of the box and the part forming the cavity 16 are dispensed with. As shown in Fig. 3, the box has no rear wall and the layers 35 are cut away to form a number of air cavities 36 around the loudspeaker 31. The thickness of the air spaces and of the layers 15 is of the same order.
GB2327834A 1934-08-13 1934-08-13 Improvements in and relating to baffles and containers for loud speakers Expired GB434563A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2327834A GB434563A (en) 1934-08-13 1934-08-13 Improvements in and relating to baffles and containers for loud speakers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2327834A GB434563A (en) 1934-08-13 1934-08-13 Improvements in and relating to baffles and containers for loud speakers

Publications (1)

Publication Number Publication Date
GB434563A true GB434563A (en) 1935-09-04

Family

ID=10193076

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2327834A Expired GB434563A (en) 1934-08-13 1934-08-13 Improvements in and relating to baffles and containers for loud speakers

Country Status (1)

Country Link
GB (1) GB434563A (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2643728A (en) * 1951-08-15 1953-06-30 William R Anthony High fidelity loud-speaker cabinet
DE925653C (en) * 1937-10-22 1955-03-28 Telefunken Gmbh Housing for electrodynamic cone loudspeakers with a deeply tuned membrane
US2866514A (en) * 1955-04-27 1958-12-30 Weathers Paul Corrective loud speaker enclosure
US2917127A (en) * 1955-02-17 1959-12-15 Pye Ltd Acoustic enclosure for loudspeakers
US3132712A (en) * 1960-01-04 1964-05-12 Wilbur L Maddy Loud-speaker enclosure
US3443660A (en) * 1967-12-14 1969-05-13 Admiral Corp Mid-range speaker and enclosure combination
US4284844A (en) * 1979-05-07 1981-08-18 Belles Research Corp. Loudspeaker system
US4509615A (en) * 1980-02-04 1985-04-09 Hruby John O Multi-chamber enclosure for loudspeakers
US4591020A (en) * 1980-02-04 1986-05-27 Hruby Jr John O Loudspeaker enclosure with isolation of loudspeaker vibration
FR2652978A1 (en) * 1989-10-10 1991-04-12 Kopferschmitt Lucien Acoustic enclosure
US5117463A (en) * 1989-03-14 1992-05-26 Pioneer Electronic Corporation Speaker system having directivity
FR2705011A1 (en) * 1993-05-04 1994-11-10 Kopferschmitt Lucien Loudspeaker enclosure
GB2290672A (en) * 1995-09-08 1996-01-03 B & W Loudspeakers Loudspeaker systems
FR2768009A1 (en) * 1997-05-27 1999-03-05 Bernard Kopferschmitt Acoustic see through wall block

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE925653C (en) * 1937-10-22 1955-03-28 Telefunken Gmbh Housing for electrodynamic cone loudspeakers with a deeply tuned membrane
US2643728A (en) * 1951-08-15 1953-06-30 William R Anthony High fidelity loud-speaker cabinet
US2917127A (en) * 1955-02-17 1959-12-15 Pye Ltd Acoustic enclosure for loudspeakers
US2866514A (en) * 1955-04-27 1958-12-30 Weathers Paul Corrective loud speaker enclosure
US3132712A (en) * 1960-01-04 1964-05-12 Wilbur L Maddy Loud-speaker enclosure
US3443660A (en) * 1967-12-14 1969-05-13 Admiral Corp Mid-range speaker and enclosure combination
US4284844A (en) * 1979-05-07 1981-08-18 Belles Research Corp. Loudspeaker system
US4509615A (en) * 1980-02-04 1985-04-09 Hruby John O Multi-chamber enclosure for loudspeakers
US4591020A (en) * 1980-02-04 1986-05-27 Hruby Jr John O Loudspeaker enclosure with isolation of loudspeaker vibration
US5117463A (en) * 1989-03-14 1992-05-26 Pioneer Electronic Corporation Speaker system having directivity
FR2652978A1 (en) * 1989-10-10 1991-04-12 Kopferschmitt Lucien Acoustic enclosure
FR2705011A1 (en) * 1993-05-04 1994-11-10 Kopferschmitt Lucien Loudspeaker enclosure
GB2290672A (en) * 1995-09-08 1996-01-03 B & W Loudspeakers Loudspeaker systems
FR2768009A1 (en) * 1997-05-27 1999-03-05 Bernard Kopferschmitt Acoustic see through wall block

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