EP0125625A1 - Enceinte pour haut-parleur avec filtre passe-bande incorporé - Google Patents

Enceinte pour haut-parleur avec filtre passe-bande incorporé Download PDF

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Publication number
EP0125625A1
EP0125625A1 EP84105247A EP84105247A EP0125625A1 EP 0125625 A1 EP0125625 A1 EP 0125625A1 EP 84105247 A EP84105247 A EP 84105247A EP 84105247 A EP84105247 A EP 84105247A EP 0125625 A1 EP0125625 A1 EP 0125625A1
Authority
EP
European Patent Office
Prior art keywords
loudspeaker
housing
opening
loudspeaker box
openings
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.)
Withdrawn
Application number
EP84105247A
Other languages
German (de)
English (en)
Inventor
Bernhard Puls
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.)
Alcatel Lucent Deutschland AG
International Standard Electric Corp
Original Assignee
Alcatel SEL AG
Standard Elektrik Lorenz AG
International Standard Electric Corp
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 Alcatel SEL AG, Standard Elektrik Lorenz AG, International Standard Electric Corp filed Critical Alcatel SEL AG
Publication of EP0125625A1 publication Critical patent/EP0125625A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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
    • H04R1/2838—Enclosures comprising vibrating or resonating arrangements of the bandpass type
    • H04R1/2842—Enclosures comprising vibrating or resonating arrangements of the bandpass type for loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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
    • H04R1/2819—Enclosures comprising vibrating or resonating arrangements of the bass reflex type for loudspeaker transducers

Definitions

  • the invention relates to a loudspeaker box consisting of a housing closed on all sides, at least one loudspeaker and at least one opening between the interior and the space outside the housing.
  • Such loudspeaker boxes are known (cf. "on the effect of special loudspeaker housings" in radio mentor, 9/1949, pages 4/9 - 424). They belong to the loudspeaker cabinets with sound diversion.
  • One example of this type of loudspeaker housing is the bass reflex housing.
  • the loudspeaker In such a bass reflex housing, in which the loudspeaker is installed in an outer wall of the loudspeaker housing in such a way that it radiates directly into the volume of the surroundings, the resonance structure of the air volume and acoustic mass of the additional radiation opening in a certain frequency range is said to be Phase rotators work and bring about the summation of the energy radiated from the front and back of the membrane.
  • the loudspeakers are arranged in the outer walls of the loudspeaker housing.
  • loudspeaker housings which, by design, are intended for the emission of certain frequencies, such as woofers, mid-range speakers or tweeters.
  • electrical crossovers ensure that only corresponding signals with the frequencies which they should preferentially emit are supplied to the corresponding loudspeakers.
  • the object on which the invention is based is to create a loudspeaker box which allows loudspeakers with large radiating areas of the loudspeaker membranes to be accommodated even in those loudspeaker housings which do not have any for recording a sound Speaker with such a large diameter has a suitable outer surface. Furthermore, an acoustic bandpass filter is to be implemented without electrical switches.
  • This object is achieved according to the invention in that a partition wall dividing the interior into two part spaces and a loudspeaker in a sound opening of the partition wall are arranged in the interior of the housing and the resonance frequencies of the resonance systems formed by the two part spaces q are different.
  • Fig. 1 illustrates the principle of the invention.
  • the loudspeaker housing 1 is divided by the partition 2 into two parts with the VoLumina V1 and V2.
  • the loudspeaker 3 is arranged in the partition 2.
  • two openings 4 are provided, into which tubes 5 are inserted.
  • movably mounted membranes so-called passive radiators, can also be arranged in the openings.
  • the loudspeaker acc. Fig. 2 differs from that according to. Fig. 1 in that there is only one opening 4 with tube 5 or a passive radiator.
  • the design of the loudspeaker box according to the invention allows on the one hand the use of loudspeakers with large radiating areas even in those applications in which the existing outside areas do not allow direct radiation.
  • the filtering properties of the loudspeaker box essentially depend on the size of the volumes V1 and V2 of the loudspeaker housing and the acoustic mass of the openings 4 with tube 5 or the passive radiator.
  • the volume of each part space and the acoustic mass of this part space form a resonance system which has a resonance frequency, which is also called the tuning frequency.
  • a filter effect is achieved in the loudspeaker box according to the invention in that the tuning frequencies differ from one another.
  • the filtering property is also dependent on the property of the loudspeaker, i.e. the so-called small signal parameters, as well as its resonance frequency, its moving mass and the flexibility of the membrane suspension.
  • the acoustic mass of the openings is determined by the area and the length of the opening. The same acoustic mass can be achieved, for example, by a long tube 5 with a large diameter or a short tube 5 with a small diameter.
  • the sound pressure curve of the loudspeaker 3 has a bandpass characteristic in the arrangement according to the invention.
  • the bandwidth is directly proportional to the difference between the two tuning frequencies and depends on the resonance frequency of the loudspeaker.
  • the upper corner frequency of the bandpass characteristic is determined by the higher of the two tuning frequencies.
  • the lower corner frequency is determined by the lower tuning frequency, the resonance frequency of the loudspeaker and the acoustic mass of the openings.
  • the real bandwidth of the transmission range is to be shifted towards higher frequencies, this can be achieved by using a loudspeaker with a higher resonance frequency, reducing the VoLumina V1 and V2 and the acoustic masses of the openings or the passive radiators.
  • FIG. 3 shows a loudspeaker box with the features according to the invention in a perspective representation.
  • This loudspeaker box is relatively narrow at the front end and also has a greater width with a greater depth.
  • Such a loudspeaker box is intended for example for the arrangement on both sides of the picture tube in television sets with stereo sound reproduction.
  • the mid-range loudspeaker 7 and the tweeter loudspeaker 8 as well as the openings 9, 10 and 11 are arranged on the narrow front surface.
  • Fig. 4 illustrates the internal structure of the loudspeaker housing 1 and the arrangement of the loudspeaker 3. To reproduce the frequencies in the mid-range, the mid-range loudspeaker 7 with a detour line 12 is provided.
  • FIG. 5 shows the sound pressure curve of a broadband loudspeaker that was installed radiating outwards into the outer wall of a loudspeaker box with a total volume of 17.8 liters.
  • the usable bandwidth is from 100 Hz to 15 kHz.
  • the VoLumina V1 and V2 had 8.9 L and the opening 4 had a diameter of 46 mm and a length of 19 mm.

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)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
EP84105247A 1983-05-13 1984-05-09 Enceinte pour haut-parleur avec filtre passe-bande incorporé Withdrawn EP0125625A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3317518 1983-05-13
DE8314251 1983-05-13
DE19833317518 DE3317518A1 (de) 1983-05-13 1983-05-13 Lautsprecherbox mit integriertem akustischem bandpassfilter

Publications (1)

Publication Number Publication Date
EP0125625A1 true EP0125625A1 (fr) 1984-11-21

Family

ID=37781891

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84105247A Withdrawn EP0125625A1 (fr) 1983-05-13 1984-05-09 Enceinte pour haut-parleur avec filtre passe-bande incorporé

Country Status (6)

Country Link
EP (1) EP0125625A1 (fr)
JP (1) JPS6035898A (fr)
DE (2) DE8314251U1 (fr)
DK (1) DK233984A (fr)
ES (1) ES288111Y (fr)
FI (1) FI841729L (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0342117A1 (fr) * 1988-05-06 1989-11-15 Societe Electronique De La Region Pays De Loire Installation sonore, en particulier stéréophonique pour téléviseurs à haut-parleur intégré de fréquences basses de grandes dimensions
US5010977A (en) * 1988-07-22 1991-04-30 Yamaha Corporation Acoustic apparatus with plural resonators having different resonance frequencies
EP0339470A3 (fr) * 1988-04-25 1991-05-15 Yamaha Corporation Circuit d'excitation électroacoustique
DE4424995A1 (de) * 1994-07-15 1996-01-18 Nokia Deutschland Gmbh Gehäuse für Baßlautsprecher
US6169811B1 (en) 1999-03-02 2001-01-02 American Technology Corporation Bandpass loudspeaker system
US6389146B1 (en) 2000-02-17 2002-05-14 American Technology Corporation Acoustically asymmetric bandpass loudspeaker with multiple acoustic filters
GB2416951A (en) * 2004-07-29 2006-02-08 Evelyn Daniel Loudspeaker unit
US7103193B2 (en) 2000-09-15 2006-09-05 American Technology Corporation Bandpass woofer enclosure with multiple acoustic fibers
EP2491726A4 (fr) * 2009-10-23 2014-09-10 Blueprint Acoustics Pty Ltd Ensemble pour haut-parleur et système de haut-parleur

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4549631A (en) * 1983-10-24 1985-10-29 Bose Corporation Multiple porting loudspeaker systems
DE3405128A1 (de) * 1984-02-14 1985-08-22 Standard Elektrik Lorenz Ag, 7000 Stuttgart Vorrichtung zur stereophonen tonwiedergabe in einem fernsehempfangsgeraet
JPH0797878B2 (ja) * 1986-11-07 1995-10-18 松下電器産業株式会社 スピ−カシステム
JPS6489700A (en) * 1987-09-30 1989-04-04 Hitachi Ltd Speaker system
US5009281A (en) * 1988-03-10 1991-04-23 Yamaha Corporation Acoustic apparatus
JPH0733509Y2 (ja) * 1988-03-16 1995-07-31 株式会社ケンウッド 低音域再生用スピーカシステム
JP2737922B2 (ja) * 1988-05-25 1998-04-08 ヤマハ株式会社 音響装置
JPH083174Y2 (ja) * 1988-12-13 1996-01-29 神鋼電機株式会社 直流電動機冷却用エアクーラーの保護装置
US5025885A (en) * 1989-07-14 1991-06-25 Bose Corporation Multiple chamber loudspeaker system
NL8902831A (nl) * 1989-11-16 1991-06-17 Philips Nv Luidsprekersysteem bevattende een helmholtz resonator gekoppeld met een akoestische buis.
DE9005642U1 (de) * 1990-05-18 1990-08-02 Salzburg, Herbert, Dr., 5000 Köln Resonanzgehäuse zum Einbau von Lautsprechern
DE4116342A1 (de) * 1991-05-18 1992-11-19 Nokia Deutschland Gmbh Ventilierter lautsprecher
DE4121408A1 (de) * 1991-06-28 1993-01-07 Nokia Deutschland Gmbh Wiedergabeanordnung fuer basstoene im kraftfahrzeug
JP3290725B2 (ja) * 1992-11-26 2002-06-10 牧雄 安部 ブラインド
DE29608421U1 (de) * 1996-05-09 1996-08-01 Nokia (Deutschland) Gmbh, 75175 Pforzheim Subwoofer-Lautsprecherbox
DE19717278C1 (de) 1997-04-24 1998-11-12 Volkswagen Ag Vorrichtung zur Klangerzeugung in einem Kraftfahrzeug
DE102023121413B4 (de) * 2023-08-10 2025-02-20 D&B Audiotechnik Gmbh & Co. Kg Lautsprechersystem mit reduzierter rückseitiger schallabstrahlung über einen breiten frequenzbereich

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2689016A (en) * 1953-04-14 1954-09-14 Henry C Lang Sound reproducing system
FR2081600A7 (fr) * 1970-03-02 1971-12-10 Inersa Sa
US3777844A (en) * 1972-10-24 1973-12-11 R Johnson Adjustable speaker cabinet
FR2349253A1 (fr) * 1976-04-21 1977-11-18 Morey Gilles Transducteur electro-acoustique

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7023571U (de) * 1970-06-23 1971-11-18 Hitachi Ltd Akustische wiedergabevorrichtung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2689016A (en) * 1953-04-14 1954-09-14 Henry C Lang Sound reproducing system
FR2081600A7 (fr) * 1970-03-02 1971-12-10 Inersa Sa
US3777844A (en) * 1972-10-24 1973-12-11 R Johnson Adjustable speaker cabinet
FR2349253A1 (fr) * 1976-04-21 1977-11-18 Morey Gilles Transducteur electro-acoustique

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0339470A3 (fr) * 1988-04-25 1991-05-15 Yamaha Corporation Circuit d'excitation électroacoustique
EP0342117A1 (fr) * 1988-05-06 1989-11-15 Societe Electronique De La Region Pays De Loire Installation sonore, en particulier stéréophonique pour téléviseurs à haut-parleur intégré de fréquences basses de grandes dimensions
WO1989011198A1 (fr) * 1988-05-06 1989-11-16 Societe Electronique De La Region Pays De Loire Installation sonore, en particulier stereophonique pour televiseurs a haut-parleur integre de frequences basses de grandes dimensions
US5119429A (en) * 1988-05-06 1992-06-02 Societe Electronique De La Region Pays De Loire Audio installation, in particular stereophonic, for television sets with a large built-in low-frequency loudspeaker
US5010977A (en) * 1988-07-22 1991-04-30 Yamaha Corporation Acoustic apparatus with plural resonators having different resonance frequencies
DE4424995A1 (de) * 1994-07-15 1996-01-18 Nokia Deutschland Gmbh Gehäuse für Baßlautsprecher
US6169811B1 (en) 1999-03-02 2001-01-02 American Technology Corporation Bandpass loudspeaker system
US6389146B1 (en) 2000-02-17 2002-05-14 American Technology Corporation Acoustically asymmetric bandpass loudspeaker with multiple acoustic filters
US7103193B2 (en) 2000-09-15 2006-09-05 American Technology Corporation Bandpass woofer enclosure with multiple acoustic fibers
GB2416951A (en) * 2004-07-29 2006-02-08 Evelyn Daniel Loudspeaker unit
EP2491726A4 (fr) * 2009-10-23 2014-09-10 Blueprint Acoustics Pty Ltd Ensemble pour haut-parleur et système de haut-parleur

Also Published As

Publication number Publication date
DE3317518A1 (de) 1984-11-15
FI841729A7 (fi) 1984-11-14
DK233984D0 (da) 1984-05-11
ES288111U (es) 1985-11-16
FI841729L (fi) 1984-11-14
JPS6035898A (ja) 1985-02-23
ES288111Y (es) 1986-06-16
DK233984A (da) 1984-11-14
DE8314251U1 (de) 1985-05-09
FI841729A0 (fi) 1984-05-02

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB IT NL SE

17P Request for examination filed

Effective date: 19841222

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19860115

RIN1 Information on inventor provided before grant (corrected)

Inventor name: PULS, BERNHARD