GB1348535A - Acoustic apparatus - Google Patents

Acoustic apparatus

Info

Publication number
GB1348535A
GB1348535A GB1348535DA GB1348535A GB 1348535 A GB1348535 A GB 1348535A GB 1348535D A GB1348535D A GB 1348535DA GB 1348535 A GB1348535 A GB 1348535A
Authority
GB
United Kingdom
Prior art keywords
panel
skins
liquid
cabinet
filled
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
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.)
Rank Organization Ltd
Original Assignee
Rank Organization 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 Rank Organization Ltd filed Critical Rank Organization Ltd
Publication of GB1348535A publication Critical patent/GB1348535A/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)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

1348535 Loud-speaker cabinets RANK ORGANISATION Ltd 29 March 1972 [7 April 1971] 8949/71 Headings H4J and H4X A loud-speaker cabinet has at least one panel constituted by at least two spaced skins with a liquid filling the space between the skins. The liquid may be water or a mixture of liquids and may contain at least one solid substance in suspension or solution or colloidal form. It may contain solids or liquids to prevent freezing or to reduce evaporation or inhibit corrosion, or it may contain solids or liquids intended to change the viscosity or add a degree of thixotropy, or to polymerize on exposure to atmosphere so that the panel becomes self-sealing. The walls of the cabinet may be rigid plates with a flexible liquid-filled bag panel attached to the inner surface of at least one plate. In one embodiment (Fig. 2) the space between the skins of a panel 3 is filled with liquid and the sound reproducing unit 2 incorporates a cooling jacket, connected by pipes 6 to the panel 3, for cooling the voice coil and/or magnet system. The skins may be flexible or rigid, or one skin may be flexible whilst the other is rigid. The panel may be fitted with a filling plug and a discharge opening for easy filling and emptying. The panel may have at least one partition between the skins (Fig. 4, not shown) so that there are at least two spaces filled with liquid between the skins. The skins may be interconnected at one part within the panel to increase its rigidity. The cabinet may incorporate several such liquid-filled panels. The cabinet may consist of a skeleton frame (7) supporting liquid-filled bags (8) constituting cabinet walls (Fig. 3, not shown). The bags (8) may be formed with perforated tabs (9) engaging hooks (10) on the frame (7).
GB1348535D 1972-03-29 1972-03-29 Acoustic apparatus Expired GB1348535A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB894971 1972-03-29

Publications (1)

Publication Number Publication Date
GB1348535A true GB1348535A (en) 1974-03-20

Family

ID=9862445

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1348535D Expired GB1348535A (en) 1972-03-29 1972-03-29 Acoustic apparatus

Country Status (1)

Country Link
GB (1) GB1348535A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4230907A (en) * 1976-02-24 1980-10-28 Braun Aktiengesellschaft Dynamic loudspeaker able to be driven at increased steady power
GB2245450A (en) * 1990-06-19 1992-01-02 Canon Kk Speaker for use in a sound output system
WO1997016941A1 (en) * 1995-11-02 1997-05-09 Svozil Vladimir Enclosure for electroacoustic transducers or their systems
WO2020161669A1 (en) 2019-02-06 2020-08-13 OLTRAMARE, Michel System for cooling the stationary winding of an induction motor
WO2021205295A1 (en) 2020-04-08 2021-10-14 OLTRAMARE, Michel Dual axial magnetic flux induction speaker

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4230907A (en) * 1976-02-24 1980-10-28 Braun Aktiengesellschaft Dynamic loudspeaker able to be driven at increased steady power
GB2245450A (en) * 1990-06-19 1992-01-02 Canon Kk Speaker for use in a sound output system
WO1997016941A1 (en) * 1995-11-02 1997-05-09 Svozil Vladimir Enclosure for electroacoustic transducers or their systems
WO2020161669A1 (en) 2019-02-06 2020-08-13 OLTRAMARE, Michel System for cooling the stationary winding of an induction motor
US11930340B2 (en) 2019-02-06 2024-03-12 Michel OLTRAMARE System for cooling the stationary winding of an induction motor
WO2021205295A1 (en) 2020-04-08 2021-10-14 OLTRAMARE, Michel Dual axial magnetic flux induction speaker

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees