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WO1982003961A1 - Orifices d'event pour de haut-parleurs bass-reflex - Google Patents

Orifices d'event pour de haut-parleurs bass-reflex Download PDF

Info

Publication number
WO1982003961A1
WO1982003961A1 PCT/US1981/000554 US8100554W WO8203961A1 WO 1982003961 A1 WO1982003961 A1 WO 1982003961A1 US 8100554 W US8100554 W US 8100554W WO 8203961 A1 WO8203961 A1 WO 8203961A1
Authority
WO
WIPO (PCT)
Prior art keywords
opening
enclosure
port
speaker
wall
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.)
Ceased
Application number
PCT/US1981/000554
Other languages
English (en)
Inventor
George A Gale
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
Priority to PCT/US1981/000554 priority Critical patent/WO1982003961A1/fr
Priority to AU73244/81A priority patent/AU7324481A/en
Priority to EP19810901632 priority patent/EP0077324A1/fr
Publication of WO1982003961A1 publication Critical patent/WO1982003961A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • H04R1/2815—Enclosures comprising vibrating or resonating arrangements of the bass reflex type
    • H04R1/2823—Vents, i.e. ports, e.g. shape thereof or tuning thereof with damping material
    • H04R1/2826—Vents, i.e. ports, e.g. shape thereof or tuning thereof with damping material for loudspeaker transducers

Definitions

  • Figure 5 is another sectional view similar to Figure 3 but showing another modified device having a generally conical shape
  • Reference numberal 10 generally designates a bass reflex speaker enclosure to which the invention is applied, the enclosure 10 including bottom and top walls 11 and 12, side walls 13 and 14, a rear wall 15 and a front wall 16.
  • the front wall 16 has a speaker opening 17 therein and supports a speaker 18 on its rearward side behind opening 17 - the speaker 18 including a cone 19 and a driver structure 20.
  • the front wall 16 also has a port opening 21 therein, below the speaker opening 17, and a port device 22 is mounted on the front wall 16 behind the port opening 21.
  • FIG 4 illustrates a modified device 27 which comprises a hollow generally cup-shaped hemispherical member 28 having a rim portion secured within a port opening 21a in an enclosure wall 16a and having an opening 29 in centered relationship on the axis of the port opening 21a.
  • Figure 5 illustrates another modified device 30 which comprises a member 31 of frusto-conical shape having a larger end secured within a port opening 21b in an enclosure wall 16b, a throat opening 32 being provided at the smaller end of the member 31.

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

Abstract

Dispositifs d'orifices d'event pour des enceintes de haut-parleurs bass-reflex et plus particulierement dispositifs permettant d'etendre la reproduction de sons jusqu'a des frequences plus basses tout en assurant l'attenuation et l'amortissement, et permettant la reduction des dimensions requises de l'enceinte pour obtenir une reproduction sonore de haute qualite. De nombreux efforts ont ete realises dans le but d'obtenir une enceinte de haut-parleur reproduisant efficacement des sons au niveau de la partie extreme de basse frequence du spectre sonore sans l'introduction de 'booms' et autres effets resonnants. Les dispositifs d'orifices d'event obtenus (22, 27, 30, 34, 38) sont montes dans des enceintes de haut-parleurs bass-reflex (10) derriere des ouvertures d'event (21, 21a-21d). Chaque dispositif possede une ouverture d'une embouchure exterieure au niveau de l'ouverture d'event du haut-parleur et une ouverture de gorge interieure (25, 39, 32, 37, 41) de surface plus petite, approximativement egale aux deux cinquiemes de la surface de l'ouverture de l'embouchure. Les formes des dispositifs comprennent des formes ayant des sections tubulaires cylindriques ou polygonales combinees a des sections de parois extremes planes interieures, une forme en escalier avec une section supplementaire tubulaire interieure, plus petite, et des formes avec des parois hemispheriques et coniques tronquees. Les rapports de surface gorge-embouchure et les rapports des volumes des dispositifs et des enceintes sont tels qu'ils permettent d'etendre et d'augmenter la reponse basse frequence sans produire d'effets de 'booms'.
PCT/US1981/000554 1981-04-28 1981-04-28 Orifices d'event pour de haut-parleurs bass-reflex Ceased WO1982003961A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/US1981/000554 WO1982003961A1 (fr) 1981-04-28 1981-04-28 Orifices d'event pour de haut-parleurs bass-reflex
AU73244/81A AU7324481A (en) 1981-04-28 1981-04-28 Port devices for bass-reflex speaker enclosures
EP19810901632 EP0077324A1 (fr) 1981-04-28 1981-04-28 Orifices d'event pour enceintes de haut-parleurs bass-reflex

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
WOUS81/00554810428 1981-04-28
PCT/US1981/000554 WO1982003961A1 (fr) 1981-04-28 1981-04-28 Orifices d'event pour de haut-parleurs bass-reflex

Publications (1)

Publication Number Publication Date
WO1982003961A1 true WO1982003961A1 (fr) 1982-11-11

Family

ID=22161201

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1981/000554 Ceased WO1982003961A1 (fr) 1981-04-28 1981-04-28 Orifices d'event pour de haut-parleurs bass-reflex

Country Status (3)

Country Link
EP (1) EP0077324A1 (fr)
AU (1) AU7324481A (fr)
WO (1) WO1982003961A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0612194A1 (fr) * 1993-02-19 1994-08-24 Sony Corporation Système de haut-parleur
EP0669783A1 (fr) * 1994-02-28 1995-08-30 Hardigg Industries, Inc. Enceinte de haut-parleur rotomoulée
FR2737074A1 (fr) * 1995-07-21 1997-01-24 Carlebach Yvan Procede de fabrication d'une enceinte acoustique
US20140072159A1 (en) * 2012-09-11 2014-03-13 Motorola Solutions, Inc. Leak tolerant acoustic transducer for mobile device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2900040A (en) * 1955-09-12 1959-08-18 Muter Company Loudspeaker system
US4196792A (en) * 1978-11-09 1980-04-08 Grieves J Philip Laminar flow vented speaker enclosure

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2900040A (en) * 1955-09-12 1959-08-18 Muter Company Loudspeaker system
US4196792A (en) * 1978-11-09 1980-04-08 Grieves J Philip Laminar flow vented speaker enclosure

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0612194A1 (fr) * 1993-02-19 1994-08-24 Sony Corporation Système de haut-parleur
US5436977A (en) * 1993-02-19 1995-07-25 Sony Corporation Speaker system
EP0669783A1 (fr) * 1994-02-28 1995-08-30 Hardigg Industries, Inc. Enceinte de haut-parleur rotomoulée
FR2737074A1 (fr) * 1995-07-21 1997-01-24 Carlebach Yvan Procede de fabrication d'une enceinte acoustique
US20140072159A1 (en) * 2012-09-11 2014-03-13 Motorola Solutions, Inc. Leak tolerant acoustic transducer for mobile device

Also Published As

Publication number Publication date
AU7324481A (en) 1982-11-24
EP0077324A1 (fr) 1983-04-27

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