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GB1270032A - Loudspeaker - Google Patents

Loudspeaker

Info

Publication number
GB1270032A
GB1270032A GB23875/69A GB2387569A GB1270032A GB 1270032 A GB1270032 A GB 1270032A GB 23875/69 A GB23875/69 A GB 23875/69A GB 2387569 A GB2387569 A GB 2387569A GB 1270032 A GB1270032 A GB 1270032A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
soft material
periphery
foamed
total weight
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
GB23875/69A
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.)
Nippon Gakki Co Ltd
Original Assignee
Nippon Gakki Co 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
Priority claimed from JP10041968U external-priority patent/JPS4740504Y1/ja
Application filed by Nippon Gakki Co Ltd filed Critical Nippon Gakki Co Ltd
Publication of GB1270032A publication Critical patent/GB1270032A/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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/26—Damping by means acting directly on free portion of diaphragm or cone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
    • H04R7/20—Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
    • H04R2307/201—Damping aspects of the outer suspension of loudspeaker diaphragms by addition of additional damping means

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

1,270,032. Diaphragms; moving coil loudspeakers. NIPPON GAKKI SEIZO K.K. 9 May, 1969 [19 Nov., 1968 (2)], No. 23875/69. Addition to 1,270,033. Heading H4J. A loudspeaker includes a rigid self-supporting diaphragm 91 (Fig. 1) of foamed plastics material secured at its periphery to a speaker frame 92 to generate sound by bending motion. Soft material 97 (e.g. foamed or unfoamed rubber or rubber-like material) having a specific gravity in the range 0À10 to 1À25 is applied, the diaphragm 9 at the periphery and has sufficient mass to prevent harmonics of the resonant frequency of the diaphragm 91 from being developed in the frequency range of about 70 to 150 Hz. The soft material 97 has an inner periphery of serrated form as shown or of sinuous form, or has a tapered surface of gradually decreasing thickness towards the centre of the diaphragm. The diaphragm may be of asymmetric shape. The diaphragm is preferably of foamed polystyrene of specific gravity 0À02 to 0À20. The total weight of soft material is 20 to 200% of the total weight of the diaphragm e.g. 100%.
GB23875/69A 1968-11-19 1969-05-09 Loudspeaker Expired GB1270032A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10041968U JPS4740504Y1 (en) 1968-11-19 1968-11-19
JP10042068 1968-11-19

Publications (1)

Publication Number Publication Date
GB1270032A true GB1270032A (en) 1972-04-12

Family

ID=26441451

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23875/69A Expired GB1270032A (en) 1968-11-19 1969-05-09 Loudspeaker

Country Status (3)

Country Link
US (1) US3603427A (en)
DE (1) DE1923769A1 (en)
GB (1) GB1270032A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2297454B (en) * 1993-10-04 1997-11-12 Vifa Speak As Loudspeaker
GB2349034A (en) * 1999-04-16 2000-10-18 Hosiden Besson Ltd Supporting surround for active panel of distributed mode speaker

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2500397C2 (en) * 1975-01-07 1986-05-28 Schorlemer, Frhr. von, Reinfried, Dipl.-Phys., 3500 Kassel Membrane for an electroacoustic transducer system and an electroacoustic transducer system equipped with it
US3976848A (en) * 1975-08-21 1976-08-24 Estes Roger Q Disposable noise reducing hearing aid attachment
US4191865A (en) * 1978-10-12 1980-03-04 Essex Group, Inc. Loudspeaker padring and method of making the same
GB2055016B (en) * 1979-06-30 1983-08-24 Pioneer Electronic Corp Driver unit for a planar diaphragm of a loudspeaker system
NL7908896A (en) * 1979-12-11 1981-07-01 Philips Nv A MECHANICAL FILTER FOR AN ELECTRODYNAMIC CONVERTER.
US4319098A (en) * 1980-04-30 1982-03-09 Motorola, Inc. Loudspeaker having a unitary mechanical-acoustic diaphragm termination
US4598789A (en) * 1982-04-19 1986-07-08 Temporal Dynamics Research, Inc. Sound reproducing
US4466505A (en) * 1982-04-19 1984-08-21 Temporal Dynamics Research, Inc. Sound reproducing combination
AU756783B2 (en) 1998-06-22 2003-01-23 Slab Technology Limited Loudspeakers
US6321868B1 (en) * 1999-06-23 2001-11-27 Asulab S.A. Watertight apparatus capable of being immersed and including an acoustic transducer
US7155021B2 (en) * 2000-05-08 2006-12-26 Koninklijke Philips Electronics N.V. Loudspeaker having an acoustic panel and an electrical driver
WO2010118313A1 (en) * 2009-04-10 2010-10-14 Immerz Inc. Systems and methods for acousto-haptic speakers
DE102012205230A1 (en) 2012-03-30 2013-10-02 Sennheiser Electronic Gmbh & Co. Kg Microphone with a microphone capsule, dynamic sounder for headphones, earphones or headsets and method for making a microphone capsule or a sounder
US10524071B2 (en) * 2015-02-05 2019-12-31 Eagle Acoustics Manufacturing, Llc Integrated voice coil and cone assembly and method of making same
EP3300390A1 (en) * 2016-09-27 2018-03-28 Sound Solutions International Co., Ltd. Dynamic loudspeaker driver, loudspeaker and mobile device comprising a loudspeaker

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3308904A (en) * 1967-03-14 Kelly loudspeakers
USRE24141E (en) * 1952-10-25 1956-04-10 Method of making the same
US2815823A (en) * 1953-03-02 1957-12-10 Rca Corp Loudspeaker structure
US2863520A (en) * 1955-03-11 1958-12-09 Gen Dynamics Corp Loudspeaker cone rim treatment
NL287574A (en) * 1962-01-15
US3247925A (en) * 1962-03-08 1966-04-26 Lord Corp Loudspeaker

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2297454B (en) * 1993-10-04 1997-11-12 Vifa Speak As Loudspeaker
GB2349034A (en) * 1999-04-16 2000-10-18 Hosiden Besson Ltd Supporting surround for active panel of distributed mode speaker

Also Published As

Publication number Publication date
DE1923769A1 (en) 1970-06-25
US3603427A (en) 1971-09-07

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