EP0390626A1 - Tonwiedergabeanordnung - Google Patents

Tonwiedergabeanordnung Download PDF

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Publication number
EP0390626A1
EP0390626A1 EP90400574A EP90400574A EP0390626A1 EP 0390626 A1 EP0390626 A1 EP 0390626A1 EP 90400574 A EP90400574 A EP 90400574A EP 90400574 A EP90400574 A EP 90400574A EP 0390626 A1 EP0390626 A1 EP 0390626A1
Authority
EP
European Patent Office
Prior art keywords
enclosure
auxiliary
loudspeaker
intermediate partition
conduit
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Withdrawn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
EP90400574A
Other languages
English (en)
French (fr)
Inventor
Jacques Morel
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 EP0390626A1 publication Critical patent/EP0390626A1/de
Withdrawn legal-status Critical Current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; 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 
    • H04R1/26—Spatial arrangements of separate transducers responsive to two or more frequency ranges
    • 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
    • H04R1/2853—Enclosures comprising vibrating or resonating arrangements using an acoustic labyrinth or a transmission line
    • H04R1/2857—Enclosures comprising vibrating or resonating arrangements using an acoustic labyrinth or a transmission line for loudspeaker transducers
    • 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
    • H04R1/2838—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

Definitions

  • the present invention relates to a sound reproduction assembly.
  • the acoustic energy In order for the transformation of electrical energy into acoustic energy carried out by such sound reproduction assemblies to be as faithful as possible, the acoustic energy must remain as constant as possible for a given electrical energy, in a frequency range from 30 Hz to 20 KHz.
  • an acoustic enclosure comprising two parts separated by an intermediate partition, a main speaker being placed opposite a orifice formed in a side wall of the first part of the enclosure and an auxiliary loudspeaker being disposed in this first part of the enclosure, opposite an orifice formed in the intermediate partition,
  • the second part of the enclosure includes a vent for placing the interior of this second part of the enclosure in communication with the outside and the loudspeakers are excited in phase opposition by the same source of electrical signals.
  • the object of the invention is therefore to solve the problems mentioned above by proposing a set of sound reproduction, which is reliable and faithful, in particular for low frequency signals, the structure of which is simple and easy to produce, and whose cost price is as low as possible.
  • the subject of the invention is a set of sound reproduction of the type comprising an acoustic enclosure comprising two parts separated by an intermediate partition, in the first part of which are arranged a main loudspeaker opposite an orifice. formed in a side wall of this first part and an auxiliary loudspeaker, opposite an orifice formed in the intermediate partition, said second part of the enclosure comprising a port for placing the interior of this second part in communication of the enclosure with the outside, said loudspeakers being excited in phase opposition by the same source of electrical signals, characterized in that a charging conduit for the auxiliary loudspeaker is provided between the orifice formed in the intermediate wall of the enclosure and the vent of the second part thereof, to put the signals emitted by the main and auxiliary speakers in phase, this conduit com bearing two portions of different section, the first, of smaller section, having a section approximately equal to that of the diaphragm of the auxiliary loudspeaker and is fixed to the intermediate partition of the enclosure opposite the auxiliary loudspeaker.
  • the second portion of the conduit has a cross section of 20 to 100% larger than that of the first portion thereof.
  • first and second portions of the conduit have approximately equal lengths, for example 0.5 m.
  • FIG. 1 which represents a first embodiment of a sound reproduction assembly according to the invention, this comprises an acoustic enclosure 1 comprising two parts 2 and 3, separated by an intermediate partition 4.
  • this acoustic enclosure In the first part 2 of this acoustic enclosure are arranged at least two speakers, namely a main speaker 5 disposed opposite an orifice 6 formed in a side wall of this first part of the enclosure, and a loud speaker auxiliary 7 disposed opposite an orifice 8 formed in the intermediate partition of this enclosure.
  • a third loudspeaker consisting for example of a TWEETER 9 type loudspeaker can also be placed in this first part of the enclosure.
  • these main 5 and auxiliary 7 speakers are active and are for example supplied in phase opposition by the same source of electrical signals, the corresponding supply terminals of these speakers being for example connected to opposite terminals of this source of electrical signals.
  • a conduit 10 for charging the auxiliary loudspeaker is provided between the orifice 8 of the intermediate partition 4 of the enclosure and a vent 11 for placing the interior of this second part of the enclosure in communication with the exterior.
  • this conduit comprises two portions of different section, the smaller section having a section roughly equal to that of the diaphragm of the auxiliary speaker 7 and is fixed to the intermediate partition. of the speaker next to this auxiliary speaker.
  • This charging conduit also allows the signals emitted by the main and auxiliary loudspeakers to be put back in phase.
  • this charging conduit comprises for example a charging tube 12 having a section approximately equal to that of the diaphragm of the loudspeaker 8 and one end of which is fixed to the intermediate partition 4 opposite this auxiliary loudspeaker .
  • This tube 12 has a length less than the height of the second part of the acoustic enclosure.
  • the internal wall of this tube forms a first portion 12a of the charging conduit, delimiting a first path of a first section for acoustic waves emitted by the membrane of the auxiliary loudspeaker through the orifice 8 formed in the intermediate partition 4 from the enclosure, toward the base of the enclosure.
  • the external wall of the tube 12 constitutes, with the internal wall of the enclosure, the second portion 12b of the charge conduit, this second portion having a section different from that of the first portion thereof and forming a second path for the waves acoustic from the base of the enclosure towards the vent 11
  • the second portion of the conduit may have a cross section of 20 to 100% greater than that of the first portion and that the first and second portions of this conduit advantageously have lengths approximately equal to and for example equal to 0.5 m.
  • the internal wall of the enclosure can be provided with means 13 absorbing the frequency signals for example greater than 150 Hz, these means being constituted for example by polyester foam.
  • this charge duct can have varied and different shapes and sections.
  • the vent 11 can also be arranged in a position other than that shown in FIG. 1 and the base of the enclosure can be provided with an acoustic signal deflector 14 disposed opposite the corresponding end of the tube, improving the transmission of these signals between the first and second portions of the charge conduit.
  • the auxiliary loudspeaker is a loudspeaker electrically excited by signals from a source.
  • this auxiliary speaker can also be constituted by a passive type speaker pneumatically excited by the main speaker.
  • FIG.2 there is shown schematically a second embodiment of this assembly.
  • This always includes an acoustic enclosure 20 in which are formed a first and a second parts 21 and 22 respectively.
  • a main speaker 23 and an auxiliary speaker 24 In the first part are arranged a main speaker 23 and an auxiliary speaker 24.
  • the main speaker is arranged opposite an orifice formed in a side wall of this first part while the auxiliary speaker is disposed opposite an orifice formed in an intermediate partition 25 delimiting the two parts of the enclosure.
  • a charging conduit for the auxiliary loudspeaker comprising a tube 26 is also provided in the second part 22 of the enclosure, this conduit comprising two portions of different sections, one of which 26a has a section roughly equal to that of the membrane of the auxiliary loudspeaker and extends from the orifice formed in the intermediate partition of this enclosure, in the direction of the base thereof.
  • the other portion 26b of this conduit extends between the base of the enclosure and a vent 27 formed therein.
  • a third embodiment can also be envisaged.
  • the sound reproduction assembly according to the invention always includes an acoustic enclosure 30 in which a first and a second part 31 and 32 are provided respectively.
  • Main 33 and auxiliary 34 speakers are arranged in the first part 31 of this enclosure.
  • the main loudspeaker 33 is disposed opposite an orifice formed in a side wall of this first part and the auxiliary loudspeaker is arranged opposite a orifice formed in an intermediate partition of this enclosure, this intermediate partition delimiting the two parts of the enclosure.
  • the charging duct is constituted by a tube 35 comprising a first portion 35a of section roughly equal to that of the membrane of the auxiliary loudspeaker and one end of which is connected to the intermediate partition of the enclosure. The other end of this first portion is connected to a second portion 35b of the tube 35, of larger section than that of the first portion. This second portion extends to a vent 36 of the enclosure.
  • the second portions of the conduits which have been described with reference to FIGS. 2 and 3, may comprise materials absorbing signals of frequency greater than 150 Hz as described above.

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  • 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)
EP90400574A 1989-03-28 1990-03-01 Tonwiedergabeanordnung Withdrawn EP0390626A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8904004A FR2645386B1 (fr) 1989-03-28 1989-03-28 Ensemble perfectionne de reproduction de sons
FR8904004 1989-03-28

Publications (1)

Publication Number Publication Date
EP0390626A1 true EP0390626A1 (de) 1990-10-03

Family

ID=9380104

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90400574A Withdrawn EP0390626A1 (de) 1989-03-28 1990-03-01 Tonwiedergabeanordnung

Country Status (2)

Country Link
EP (1) EP0390626A1 (de)
FR (1) FR2645386B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2256344A (en) * 1991-05-29 1992-12-02 Hughes Aircraft Co High mass low resonance speaker system
GB2288514A (en) * 1993-10-16 1995-10-18 Jozef Szczepanski A horn stand for loudspeakers
WO1998024268A1 (en) * 1996-11-25 1998-06-04 Excel Sound & Art Speaker system
WO2008056258A2 (en) * 2006-11-10 2008-05-15 Pss Belgium Nv Loudspeaker system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4064966A (en) * 1976-03-11 1977-12-27 Burton William D Loudspeaker apparatus
FR2361032A1 (fr) * 1976-08-06 1978-03-03 Elipson Perfectionnement aux enceintes acoustiques
US4325454A (en) * 1980-09-29 1982-04-20 Humphrey Theodore J Speaker system which inverts and redirects the speaker backwave
FR2505125A1 (fr) * 1981-04-30 1982-11-05 Lemonne Denis Systeme de couplage de transducteurs electro-acoustiques
FR2579852A1 (fr) * 1985-03-28 1986-10-03 Jacquet Castellano Patrice Enceinte acoustique a haut rendement

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4064966A (en) * 1976-03-11 1977-12-27 Burton William D Loudspeaker apparatus
FR2361032A1 (fr) * 1976-08-06 1978-03-03 Elipson Perfectionnement aux enceintes acoustiques
US4325454A (en) * 1980-09-29 1982-04-20 Humphrey Theodore J Speaker system which inverts and redirects the speaker backwave
FR2505125A1 (fr) * 1981-04-30 1982-11-05 Lemonne Denis Systeme de couplage de transducteurs electro-acoustiques
FR2579852A1 (fr) * 1985-03-28 1986-10-03 Jacquet Castellano Patrice Enceinte acoustique a haut rendement

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2256344A (en) * 1991-05-29 1992-12-02 Hughes Aircraft Co High mass low resonance speaker system
GB2288514A (en) * 1993-10-16 1995-10-18 Jozef Szczepanski A horn stand for loudspeakers
GB2288514B (en) * 1993-10-16 1998-04-29 Jozef Szczepanski A horn stand for Loudspeakers for precision sound radiation
WO1998024268A1 (en) * 1996-11-25 1998-06-04 Excel Sound & Art Speaker system
WO2008056258A2 (en) * 2006-11-10 2008-05-15 Pss Belgium Nv Loudspeaker system
WO2008056258A3 (en) * 2006-11-10 2008-07-03 Pss Belgium Nv Loudspeaker system

Also Published As

Publication number Publication date
FR2645386B1 (fr) 1991-06-21
FR2645386A1 (fr) 1990-10-05

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