EP0273096A2 - Système de reproduction de son passif pour la reproduction en phase vers l'avant de la pression acoustique produite par la face arrière du diaphragme - Google Patents

Système de reproduction de son passif pour la reproduction en phase vers l'avant de la pression acoustique produite par la face arrière du diaphragme Download PDF

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Publication number
EP0273096A2
EP0273096A2 EP87108432A EP87108432A EP0273096A2 EP 0273096 A2 EP0273096 A2 EP 0273096A2 EP 87108432 A EP87108432 A EP 87108432A EP 87108432 A EP87108432 A EP 87108432A EP 0273096 A2 EP0273096 A2 EP 0273096A2
Authority
EP
European Patent Office
Prior art keywords
sound
membrane
loudspeaker
passive
phase
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Withdrawn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
EP87108432A
Other languages
German (de)
English (en)
Other versions
EP0273096A3 (fr
Inventor
Hans Havenith
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 EP0273096A2 publication Critical patent/EP0273096A2/fr
Publication of EP0273096A3 publication Critical patent/EP0273096A3/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Withdrawn legal-status Critical Current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
    • H04R1/283—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

Definitions

  • the invention relates to a sound transmission system and a loudspeaker housing construction that uses the loudspeaker backside sound energy of the loudspeaker to improve the reproduction. So far, the sound energy generated by the back of the diaphragm has only been used by loudspeakers in the low frequency range. For this reason, the description will preferably deal with this, although the invention is not restricted exclusively to the low-frequency range. (see “scope”)
  • the classic closed loudspeaker has various disadvantages, such as The weaker bass response and the increase in distortion and modulation distortion (AM) due to the braking and spring effect of the enclosed air (especially in the case of smaller enclosures), several other enclosure systems were developed with the aim of improving the bass response. To achieve this goal, some systems also use the sound energy generated by the woofer on the back of the membrane.
  • AM distortion and modulation distortion
  • the construction methods used to improve the bass reproduction can be divided into two groups. First of all in the group of systems that let sound generated by the woofer through the housing through a housing opening to the outside (e.g. bass reflex system and transmission line). In addition to these systems with opening - that is, the open systems - as representatives of the second group - the closed systems - the process of using the sound energy inside through passive system (s).
  • the passive membrane system is called "closed" here because the air inside the housing cannot meet the outside air.
  • the rear-sided emitted wavefronts of the woofer excite the membrane of the passive system to vibrate, and this membrane thereby releases the air pressure fluctuations of the housing to the outside.
  • the passive membrane principle has the advantage that, compared to the classic closed box, it reduces the distortion-promoting pressure build-up and breakdown inside the housing.
  • the object of the invention is to emit sound energy generated on the back of the diaphragm in phase over the entire transmission range of the loudspeaker to the outside (front) and to additionally amplify the bass range when used in the low frequency range.
  • the membranes 1 and 1 b are firmly connected to the two passive membranes attached to the baffle by means of the fastening elements (2) and the transmission element (3), these two front membranes perform exactly the same movement as the membranes 1 and 1 and thus also the same movement as the diaphragm of the woofer. Therefore, the two outer passive membranes mounted on the baffle move in phase according to the invention
  • Low-frequency loudspeaker diaphragm because the system reacts to negative air pressure in the housing in the same way, only with the opposite direction of movement, i.e. towards the front.
  • the invention uses all the sound wave fronts inside the housing - which the bass loudspeaker produces - in a steered manner, the sound energy inside the housing, in phase with the bass loudspeaker, reaches the outside in a bass-enhancing manner. There can be no extinction effects with which all other systems are more or less afflicted, because the invention, by design, produces phase equality with the direction of movement of the bass loudspeaker membrane towards the outside.
  • This bass-enhancing effect - over the entire transmission range of the woofer without sound suppression - is not offered by any other system that makes use of the internal sound energy of the housing. Since the invention is an acoustically closed system, no sound-canceling air exchange can take place between the interior and exterior air of the housing.
  • the invention does not have the disadvantages of the classic closed housing (which arise there from pressure build-up and reduction or the spring action of the enclosed air), because the air enclosed in the housing releases kinetic energy to the inner passive membrane (s) through the invention (which are transmitted and emitted in phase as sound waves to the outside).
  • This largely eliminates the disadvantages of the classic closed housing.
  • the spring action of the air enclosed in the housing is used by the invention, its energy is transmitted to the outside. Distortion and modulation distortions are reduced by the high damping that the moving membranes exert on the interior air of the housing; standing waves within the housing are reduced.
  • the invention also offers various new possibilities for low-frequency amplification with a greater frequency. Some coordination options are explained in more detail in the exemplary embodiments.
  • FIGS. 1, 2 and 3 Possible designs or technical implementations of the invention are shown in the drawings in FIGS. 1, 2 and 3.
  • the housing is divided into a plurality of chambers which are sealed airtightly against each other. A pressure equalization takes place between the chambers via passive membranes.

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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)
EP87108432A 1986-12-01 1987-06-11 Système de reproduction de son passif pour la reproduction en phase vers l'avant de la pression acoustique produite par la face arrière du diaphragme Withdrawn EP0273096A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3641055 1986-12-01
DE19863641055 DE3641055A1 (de) 1986-12-01 1986-12-01 Schalluebertragungssystem fuer den tieftonbereich, mit zum tieftonlautsprecher gleichphasiger wiedergabe der inseitigen gehaeuseschallenergie nach aussen

Publications (2)

Publication Number Publication Date
EP0273096A2 true EP0273096A2 (fr) 1988-07-06
EP0273096A3 EP0273096A3 (fr) 1989-07-26

Family

ID=6315226

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87108432A Withdrawn EP0273096A3 (fr) 1986-12-01 1987-06-11 Système de reproduction de son passif pour la reproduction en phase vers l'avant de la pression acoustique produite par la face arrière du diaphragme

Country Status (2)

Country Link
EP (1) EP0273096A3 (fr)
DE (1) DE3641055A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001024574A1 (fr) * 1999-09-30 2001-04-05 Alexandr Grigorov Arsov Systeme haut-parleur
WO2019105547A1 (fr) * 2017-11-29 2019-06-06 Harman Becker Gepkocsirendszer Gyarto Korlatolt Felelössegü Tarsasag Agencement de haut-parleur

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102023128412A1 (de) * 2023-10-17 2025-04-17 Brose Fahrzeugteile Se & Co. Kommanditgesellschaft, Bamberg Schallerzeugungseinheit für ein akustisches Fahrzeug-Warnsystem mit gehäuseintegrierter Membran

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2107956A (en) * 1981-10-20 1983-05-05 Norman Dusanek Woofer loudspeaker

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001024574A1 (fr) * 1999-09-30 2001-04-05 Alexandr Grigorov Arsov Systeme haut-parleur
WO2019105547A1 (fr) * 2017-11-29 2019-06-06 Harman Becker Gepkocsirendszer Gyarto Korlatolt Felelössegü Tarsasag Agencement de haut-parleur
US11146885B2 (en) 2017-11-29 2021-10-12 Harman Becker Gepkocsirendszer Gyarto Kft. Loudspeaker arrangement

Also Published As

Publication number Publication date
DE3641055C2 (fr) 1989-09-21
DE3641055A1 (de) 1988-06-16
EP0273096A3 (fr) 1989-07-26

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