DE3213678A1 - Loudspeaker combination - Google Patents

Loudspeaker combination

Info

Publication number
DE3213678A1
DE3213678A1 DE19823213678 DE3213678A DE3213678A1 DE 3213678 A1 DE3213678 A1 DE 3213678A1 DE 19823213678 DE19823213678 DE 19823213678 DE 3213678 A DE3213678 A DE 3213678A DE 3213678 A1 DE3213678 A1 DE 3213678A1
Authority
DE
Germany
Prior art keywords
loudspeaker
stray field
loudspeakers
loudspeaker combination
magnets
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.)
Granted
Application number
DE19823213678
Other languages
German (de)
Other versions
DE3213678C2 (en
Inventor
Friedrich-Karl 2807 Achim-Baden Wendt
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.)
Dewek Vereinigte Deutsche Electronic-Werke 7 GmbH
Original Assignee
Norddeutsche Mende Rundfunk AG & Co
NORDDEUTSCHE MENDE RUNDFUNK AG
Norddeutsche Mende Rundfunk Ag & Co 2800 Bremen
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 Norddeutsche Mende Rundfunk AG & Co, NORDDEUTSCHE MENDE RUNDFUNK AG, Norddeutsche Mende Rundfunk Ag & Co 2800 Bremen filed Critical Norddeutsche Mende Rundfunk AG & Co
Priority to DE19823213678 priority Critical patent/DE3213678C2/en
Publication of DE3213678A1 publication Critical patent/DE3213678A1/en
Application granted granted Critical
Publication of DE3213678C2 publication Critical patent/DE3213678C2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/60—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

A loudspeaker combination with at least two loudspeaker systems, for example a tweeter and a woofer, which is suitable for installation in close proximity to the picture tube of a colour television, should, with its resulting stray field, have no interfering effect on the electron beams and thus no undesirably severe effect on the screen scanning. The present invention proposes selecting reverse polarity for the magnets of two loudspeakers and reducing only the resulting stray field of the stronger magnet to an acceptable value with a simple and inexpensive screen.

Description

Beschreibung description

Die Erfindung betrifft eine Lautsprecherkombination bestehend aus mindestens zwei Lautsprechern dicht beieinander und seitlich neben der Bildröhre eines Farbfernsehempfängers gemäß dem Oberbegrifl des Anspruchs.The invention relates to a loudspeaker combination consisting of at least two speakers close together and to the side of the picture tube a color television receiver according to the preamble of the claim.

Eine Qualitätsverbesserung der Fernsehtonwiedergabe verlangt außer höheren Schaltungsaufwand, beispielsweise für den NF-Verstarker, auch die Verwendung hochwertigerer Lautsprecher. Diese besitzen im allgemeinen erheblich stärkere Dauermagnete. Leider sind die Streufelder dieser Lautsprecher ohne entsprechende Maßnah-n konstruktiver Art un-5 oft noch zusätzliche, teure Abs&ilirmtöpfe so stark, daß die Bildqualität speziell hinsichtlich der Farbreinheit unbefriedigend ist.Lautsprecher, die für den Einsatz nahe einer lparbbildröhre verwendet werden können, sind erheblich teurer.An improvement in the quality of the television sound reproduction also requires higher circuit complexity, for example for the LF amplifier, also the use higher quality speakers. These generally have considerably stronger permanent magnets. Unfortunately, the stray fields of these loudspeakers are more constructive without appropriate measures Art un-5 often additional, expensive Abs & ilirmpots so strong that the picture quality is particularly unsatisfactory in terms of color purity. Loudspeakers designed for that can be used close to an image tube are considerably more expensive.

Farbbildröhren neuer Art sind zudem ganz besonders empfindlich gegen Streufelder, wenn keine Korrektureinstellmöglichkeiten für die entsprechende Farb-Konvergenz mehr vorgesehen sind. Auch hierbei spielen konstruktive und Kostengründe wiederum eine Rolle.A new type of color picture tubes are also particularly sensitive to Stray fields if there are no correction setting options for the corresponding color convergence more are provided. Here, too, constructive and cost reasons play a role a role.

Der Erfindung lag somit die Aufgabe zugrunde, eine preisgünstige Lautsprecherkombination mit mindestens zwei Lautsprechern zu schaffen, deren resultierendes Reststreufeld ohne aufwendige Abschirmmaßnahmcn akzeptabel gering ist.The invention was therefore based on the object of an inexpensive loudspeaker combination to create with at least two loudspeakers, their resulting residual stray field without complex shielding measures is acceptably low.

Diese Aufgabe wird für den angegebenen Oberbegriff des Anspruchs gemäß dem Kennzeichen gelöst, daß die Dauermagnete beider Lautsprecher umgekehrt zueinaner gepolt sind und nur der Lautsprecher mit dem dominierenden Streufeld eine Abschirmung für das -resultierende Reststreufeld aufweis.This task is according to the specified preamble of the claim solved the characteristic that the permanent magnets of both loudspeakers are reversed to one another are polarized and only the loudspeaker with the dominant stray field is shielded for the resulting residual scatter field.

Da nach der Erfindung lediglich das Reststreufeld mittels einer einfachen Abschirmung in Form eines Bechers über dem Dauermagneten des dominierenden l.autsprechers erforderlich ist, kann dies eine einache kostengünstige Lösung sein, denn die Kompenkation des resultierenden Streufeldes wird bereits durch die umgekehrte Polung der Magnete zweier benachbarter Lautsprecher im wesentlichen erreicht. Da aber die Streufelder der meisten Lautsprechermagnete inhomogen und dazu noch von Lautsprecher zu Lautsprecher selbst einer Type stark schwankend sind, kann auf die Abschirmung des stärkeren nicht verzichtet werden, um dessen streuende Magnetfeldstärke an den nichtabgeschirmten Lautsprecher anzupassen.Since according to the invention only the residual stray field by means of a simple Shielding in the form of a cup over the permanent magnet of the dominant left speaker is required, this can be a simple inexpensive solution because the compensation the resulting stray field is already due to the reversed polarity of the magnets two adjacent loudspeakers essentially achieved. But there the stray fields of most loudspeaker magnets inhomogeneously and from loudspeaker to loudspeaker even of one type fluctuates strongly, the shielding of the stronger one can be affected not be waived to its scattering magnetic field strength on the unshielded Adjust speakers.

Claims (1)

Patentanspruch Lautsprecherkombination bestehend aus mindestens zwei Lautsprechern direkt beieinander und seitlich neben der Bildröhre eines Farbfernsehempfängers, dadurch gekennzeiÅhnet, daß die Dauermagnete beider Lautsprecher umgekehrt zu-einander gepolt sind und nur der Lautsprecher mit dem dominierenden Streufeld eine Abschirmung für das resultierende Reststreufeld aufweist. Claim loudspeaker combination consisting of at least two Speakers directly next to each other and to the side of the picture tube of a color television receiver, characterized by the fact that the permanent magnets of both loudspeakers are reversed to each other are polarized and only the loudspeaker with the dominant stray field is shielded for the resulting residual stray field.
DE19823213678 1982-04-14 1982-04-14 Speaker combination Expired DE3213678C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19823213678 DE3213678C2 (en) 1982-04-14 1982-04-14 Speaker combination

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19823213678 DE3213678C2 (en) 1982-04-14 1982-04-14 Speaker combination

Publications (2)

Publication Number Publication Date
DE3213678A1 true DE3213678A1 (en) 1983-10-27
DE3213678C2 DE3213678C2 (en) 1984-07-12

Family

ID=6160867

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19823213678 Expired DE3213678C2 (en) 1982-04-14 1982-04-14 Speaker combination

Country Status (1)

Country Link
DE (1) DE3213678C2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3940859A1 (en) * 1989-12-11 1991-06-13 Thomson Brandt Gmbh Active loudspeaker cabinet lined with metallic screening material - to which connections are made from mains interference suppression filter and casing of tweeter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3821166A1 (en) * 1988-06-23 1989-12-28 Electronic Werke Deutschland PASSIVE SPEAKER BOX FOR A TELEVISION RECEIVER

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB448653A (en) * 1935-03-18 1936-06-12 George Donald Skinner Improvements in combined television and sound reproducing apparatus
US2164537A (en) * 1936-08-05 1939-07-04 Mead John Edward Television receiving apparatus
DE757605C (en) * 1937-10-21 1952-11-17 Telefunken Gmbh TV receiver with dynamic loudspeaker and Braunschweig tube
DE1893146U (en) * 1961-04-28 1964-05-21 Akg Akustische Kino Geraete SPEAKER ARRANGEMENT FOR TELEVISIONS.
DE8121124U1 (en) * 1981-07-18 1982-01-07 Standard Elektrik Lorenz Ag, 7000 Stuttgart TELEVISION RECEIVER FOR STEREOPHONE SOUND PLAYBACK

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB448653A (en) * 1935-03-18 1936-06-12 George Donald Skinner Improvements in combined television and sound reproducing apparatus
US2164537A (en) * 1936-08-05 1939-07-04 Mead John Edward Television receiving apparatus
DE757605C (en) * 1937-10-21 1952-11-17 Telefunken Gmbh TV receiver with dynamic loudspeaker and Braunschweig tube
DE1893146U (en) * 1961-04-28 1964-05-21 Akg Akustische Kino Geraete SPEAKER ARRANGEMENT FOR TELEVISIONS.
DE8121124U1 (en) * 1981-07-18 1982-01-07 Standard Elektrik Lorenz Ag, 7000 Stuttgart TELEVISION RECEIVER FOR STEREOPHONE SOUND PLAYBACK

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3940859A1 (en) * 1989-12-11 1991-06-13 Thomson Brandt Gmbh Active loudspeaker cabinet lined with metallic screening material - to which connections are made from mains interference suppression filter and casing of tweeter

Also Published As

Publication number Publication date
DE3213678C2 (en) 1984-07-12

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Legal Events

Date Code Title Description
OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
8110 Request for examination paragraph 44
8125 Change of the main classification

Ipc: H04N 5/64

D2 Grant after examination
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: DEWEK VEREINIGTE DEUTSCHE ELECTRONIC-WERKE GMBH, 7

8339 Ceased/non-payment of the annual fee