GB1316771A - Sound reproducing system - Google Patents

Sound reproducing system

Info

Publication number
GB1316771A
GB1316771A GB2813070A GB2813070A GB1316771A GB 1316771 A GB1316771 A GB 1316771A GB 2813070 A GB2813070 A GB 2813070A GB 2813070 A GB2813070 A GB 2813070A GB 1316771 A GB1316771 A GB 1316771A
Authority
GB
United Kingdom
Prior art keywords
cabinet
free piston
loudspeaker
free
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
GB2813070A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB1316771A publication Critical patent/GB1316771A/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
    • H04R1/2807—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)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

1316771 Loud-speakers S YANDO 10 June 1970 [19 June 1969] 28130/70 Headings H4J and H4X A loud-speaker (diagrammatically represented by a disc 16) Fig. 1, is mounted in an air-tight cabinet 10 in which a free piston 13 is sealingly mounted by an elastic membrane 14. Sound emitted from the free piston 13 augments that emitted by the loud-speaker 16 over a predetermined low frequency range. There may be several free pistons and these may resonate at different frequencies. A substantially rigid shell (not shown), substantially encloses the cabinet 10, has an opening adjacent the loudspeaker 16 to radiate the acoustic output of the system, and acts to augment the power output of the system over the low frequency range. Preferably the enclosed volume of air in the cabinet 10 is substantially isobaric over the low frequency range. A moving coil loudspeaker is used. In an alternative arrangement, the loudspeaker 316 Fig. 6, is sealingly mounted on a movable piston 313 forming a front cabinet wall which is sealed to the remainder of the cabinet 310 by an elastic membrane 314. In addition, a portion of the rear wall 325 of the cabinet may also be sealed by an elastic membrane 326. The mass of free piston 325 is then substantially equal to that of free piston 313 plus the magnetic structure and frame of the loudspeaker 316. The cross-sectional area of free piston 325 is substantially equal to that of free piston 313. The momenta of the pistons is thus equal but oppositely directed, thereby creating a dynamic balance which leaves the body of cabinet 310 quiescent and free of objectionable vibrations- The pistons resonate with the elastic stiffness of the dynamic system at one and the same frequency. The sealed cabinet 310 has standoffs 327 and is within an outer shell 328.
GB2813070A 1969-06-19 1970-06-10 Sound reproducing system Expired GB1316771A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US84011769A 1969-06-19 1969-06-19

Publications (1)

Publication Number Publication Date
GB1316771A true GB1316771A (en) 1973-05-16

Family

ID=25281493

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2813070A Expired GB1316771A (en) 1969-06-19 1970-06-10 Sound reproducing system

Country Status (4)

Country Link
US (1) US3727719A (en)
CA (1) CA929109A (en)
DE (1) DE2029073A1 (en)
GB (1) GB1316771A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5073430U (en) * 1973-10-31 1975-06-27
JPS5092229U (en) * 1973-12-24 1975-08-04
JPS50161225A (en) * 1974-06-01 1975-12-27
JPS52100742U (en) * 1976-01-28 1977-07-30
JPS5320931U (en) * 1976-07-31 1978-02-22
JPS5492732U (en) * 1977-12-14 1979-06-30
GB2245450A (en) * 1990-06-19 1992-01-02 Canon Kk Speaker for use in a sound output system
GB2256343A (en) * 1991-05-29 1992-12-02 Hughes Aircraft Co High efficiency low frequency speaker system

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3978941A (en) * 1975-06-06 1976-09-07 Curt August Siebert Speaker enclosure
US4142603A (en) * 1976-11-22 1979-03-06 Johnson Rubein V Adjustable speaker cabinet
US4231445A (en) * 1978-12-04 1980-11-04 Johnson Rubein V Acoustic lens speaker cabinet
DE3709700A1 (en) * 1987-03-25 1988-10-13 Meggl Friedemann SPEAKER HOUSING
US4949386A (en) * 1988-05-23 1990-08-14 Hill Amel L Speaker system
US6411720B1 (en) * 1998-03-05 2002-06-25 Eric K. Pritchard Speaker systems with lower frequency of resonance
JPH11331965A (en) * 1998-05-15 1999-11-30 Fujitsu Ltd Information processor and speaker unit applicable to the processor
US6430297B1 (en) * 1998-09-28 2002-08-06 Murata Manufacturing Co., Ltd. Speaker and speaker device
US6520282B1 (en) * 2000-10-24 2003-02-18 Nysora, Inc. Sound enhancement mechanism for speaker sound system
US6625292B2 (en) 2001-11-15 2003-09-23 Jl Audio, Inc. Ported loudspeaker enclosure
US6744902B2 (en) 2001-11-15 2004-06-01 Jl Audio, Inc. Ported loudspeaker enclosure
US7207413B2 (en) * 2003-06-02 2007-04-24 Tbi Audio Systems Llc Closed loop embedded audio transmission line technology for loudspeaker enclosures and systems
JP4767164B2 (en) * 2004-04-13 2011-09-07 パナソニック株式会社 Speaker device
US8520866B2 (en) * 2006-12-15 2013-08-27 Nokia Corporation Apparatus, method, and computer program product providing sound-produced tactile feedback
TW200829053A (en) * 2006-12-21 2008-07-01 Global Target Entpr Inc Thin-film type sound source output apparatus
US8189841B2 (en) * 2008-03-27 2012-05-29 Bose Corporation Acoustic passive radiating
US8085968B2 (en) * 2008-07-17 2011-12-27 Bose Corporation Resonating cone transducer
US9020177B2 (en) * 2011-09-30 2015-04-28 Apple Inc. Method and apparatus for construction of an acoustic module backvolume
GB2497315A (en) * 2011-12-06 2013-06-12 B & W Group Ltd Decoupled loudspeaker drive unit operated by magnet reaction force or recoil
US8842868B1 (en) * 2013-06-25 2014-09-23 Jazz Hipster Corporation Structure for passive radiation sound box
US9226061B2 (en) * 2013-08-28 2015-12-29 Daniel T. Lilley, Jr. Speaker assembly
US9571934B2 (en) 2014-03-26 2017-02-14 Bose Corporation Acoustic device with passive radiators
GB201721127D0 (en) * 2017-12-18 2018-01-31 Pss Belgium Nv Dipole loudspeaker for producing sound at bass frequencies
CN209462592U (en) * 2018-12-17 2019-10-01 歌尔科技有限公司 Acoustic apparatus and electronic equipment

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2713396A (en) * 1950-05-24 1955-07-19 Ernest A Tavares Novel, small, extended low frequency response, loudspeaker enclosure
US3101810A (en) * 1959-07-08 1963-08-27 Allied Instructional Developme Loudspeaker resonator
US3240289A (en) * 1963-10-25 1966-03-15 Sony Corp Sound system
US3194340A (en) * 1964-05-15 1965-07-13 Kuwayama Zennosuke Speaker enclosure system
US3275100A (en) * 1965-06-16 1966-09-27 William S Dunning Loudspeaker assembly having loudspeaker wholly supported by vibratory diaphragm

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5073430U (en) * 1973-10-31 1975-06-27
JPS5611502Y2 (en) * 1973-10-31 1981-03-16
JPS5092229U (en) * 1973-12-24 1975-08-04
JPS5644147Y2 (en) * 1973-12-24 1981-10-15
JPS50161225A (en) * 1974-06-01 1975-12-27
JPS5613080B2 (en) * 1974-06-01 1981-03-26
JPS52100742U (en) * 1976-01-28 1977-07-30
JPS5320931U (en) * 1976-07-31 1978-02-22
JPS5710149Y2 (en) * 1976-07-31 1982-02-26
JPS5492732U (en) * 1977-12-14 1979-06-30
GB2245450A (en) * 1990-06-19 1992-01-02 Canon Kk Speaker for use in a sound output system
GB2256343A (en) * 1991-05-29 1992-12-02 Hughes Aircraft Co High efficiency low frequency speaker system

Also Published As

Publication number Publication date
CA929109A (en) 1973-06-26
US3727719A (en) 1973-04-17
DE2029073A1 (en) 1971-01-21

Similar Documents

Publication Publication Date Title
GB1316771A (en) Sound reproducing system
US3780824A (en) Acoustic loading system
GB1435623A (en) Multiple driver dynamic loud speaker
GB1017080A (en) Hand microphones for dictation equipment
JPS5660191A (en) Acoustic device for car
JPS5414726A (en) Dome type speaker
GB1270032A (en) Loudspeaker
GB1344370A (en) Loudspeaker cabinet
GB963853A (en) Loudspeakers
ES456320A1 (en) Speaker unit
US3155774A (en) Loudspeaker arrangement
US5099948A (en) Compact woofer speaker system
GB1152174A (en) Vibratile System
FR2405608A1 (en) Speaker enclosure with front and internal loudspeakers - has internal speaker supplied with greater power via low-pass filter
CN208836289U (en) A kind of two-way TV loudspeaker box spoken in front and back
JPS5919678B2 (en) speaker device
GB912430A (en) Improvements in or relating to loud speakers
FR2343388A1 (en) Loudspeaker enclosure with resonating chamber - has two loudspeakers acoustically and electrically coupled to improve LF performance
SU720830A1 (en) Acoustic device
FR2373936A1 (en) Loudspeaker cabinet constructional system - includes two opposed woofers with sealed cubic air space between them of min. possible volume
JPH0993686A (en) Speaker equipment
SU686153A1 (en) Portable acoustic system
GB1181259A (en) Improvements in Hearing-Aids of the kind worn on the Users' Heads
KR200175163Y1 (en) Speaker unit and speaker system capable of generating an anion
US3102605A (en) Sound reproducing system

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee