DE3213678C2 - Speaker combination - Google Patents
Speaker combinationInfo
- Publication number
- DE3213678C2 DE3213678C2 DE19823213678 DE3213678A DE3213678C2 DE 3213678 C2 DE3213678 C2 DE 3213678C2 DE 19823213678 DE19823213678 DE 19823213678 DE 3213678 A DE3213678 A DE 3213678A DE 3213678 C2 DE3213678 C2 DE 3213678C2
- Authority
- DE
- Germany
- Prior art keywords
- loudspeaker
- loudspeakers
- stray field
- magnets
- shielding
- 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.)
- Expired
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
Eine Lautsprecherkombination mit mindestens zwei Lautsprechersystemen, beispielsweise einem Hoch- und einem Tieftöner, die für den Einbau dicht neben dem Bildrohr eines Farbfernsehers geeignet ist, soll mit seinem resultierenden Streufeld keinen störenden Einfluß auf die Elektronenstrahlen und damit keine unerwünscht starke Wirkung auf die Bild schirm abtastung besitzen. Die vorliegende Erfindung schlägt vor, die Polung der Magnete zweier Lautsprecher umgekehrt zu wählen und nur das resultierende Streufeld des stärkeren Magneten mit einer einfachen und billigen Abschirmung auf einen akzeptablen Wert zu reduzieren.A loudspeaker combination with at least two loudspeaker systems, for example a tweeter and a woofer, which is suitable for installation close to the picture tube of a color television, should scan with its resulting stray field no disturbing influence on the electron beams and thus no undesirably strong effect on the picture screen own. The present invention proposes reversing the polarity of the magnets of two loudspeakers and reducing only the resulting stray field of the stronger magnet to an acceptable value with simple and cheap shielding.
Description
1515th
Die Erfindung betrifft eine Lautsprecherkombination bestehend aus mindestens zwei Lautsprechern dicht beieinander und seitlich neben der Bildröhre eines Farbfernsehempfängers gemäß dem Oberbegriff des Anspruchs. The invention relates to a loudspeaker combination consisting of at least two loudspeakers tightly next to each other and to the side of the picture tube of a color television receiver according to the preamble of the claim.
Eine Qualitätsverbesserung der Fernsehtonwiedergabe verlangt außer höheren Schaltungsaufwand, beispielsweise für den N F-Verstärker, auch die Verwendung hochwertigerer Lautsprecher. Diese besitzen im allgemeinen erheblich stärkere Dauermagnete. Leider 2·> sind die Streufelder dieser Lautsprecher ohne entsprechende Maßnahmen konstruktiver Art und oft noch zusätzliche, teure Abschirmtöpfe so stark, daß die Bildqualität speziell hinsichtlich der Farbreinheit unbefriedigend ist. Lautsprecher, die für den Einsatz nahe einer 30 |- Farbbildröhre verwendet werden können, sind erheblich teurer. Farbbildröhren neuer Art sind zudem ganz besonders empfindlich gegen Streufelder, wenn keine Korrektureinstellmöglichkeitcn für die entsprechende Färb-Konvergenz mehr vorgesehen sind. Auch hierbei js spielen konstruktive und Kostengründe wiederum eine Rolle.An improvement in the quality of the television sound reproduction also requires higher circuit complexity, for example for the NF amplifier, also the use of higher quality loudspeakers. These have im generally much stronger permanent magnets. Unfortunately 2 ·> are the stray fields of these loudspeakers without appropriate measures of a constructive nature and often additional, expensive shielding pots are so strong that the image quality, especially in terms of color purity, is unsatisfactory is. Speakers designed for use near a 30 | Color picture tubes that can be used are considerably more expensive. Color picture tubes of a new kind are also whole particularly sensitive to stray fields if there are no correction settings for the corresponding Color convergence are more provided. Here, too, js In turn, constructive and cost reasons play a role.
Der Erfindung lag somit die Aufgabe zugrunde, eine preisgünstige Lautsprecherkombination mit mindestens zwei Lautsprechern zu schaffen, deren resultierendes Reststreufeld ohne aufwendige Abschirmmaßnahtnen akzeptabel gering ist.The invention was therefore based on the object of providing an inexpensive loudspeaker combination with at least to create two loudspeakers, the resulting residual stray field without costly shielding seams is acceptably low.
Diese Aufgabe wird für den angegebenen Oberbegriff des Anspruchs gemäß dem Kennzeichen gelöst, daß die Dauermagnete beider Lautsprecher umgekehrt zueinander gepolt sind und nur der Lautsprecher mit dem dominierenden Streufeld eine Abschirmung für das resultierende Reststreufeld aufweist.This object is achieved for the specified preamble of the claim according to the characteristic, that the permanent magnets of both loudspeakers are polarized opposite to each other and only the loudspeaker with the dominating stray field has a shield for the resulting residual stray field.
Da nach der Erfindung lediglich das RcststrcufeldSince according to the invention only the Rcststrcufeld
mittels einer einfachen Abschirmung in Form eines Bechers über dem Dauermagneten des dominierenden Lautsprechers erforderlich ist. k;mn dies eine einfache kostengünstige Lösung sein, denn die Kompensation des resultierenden Streufeldes wird bereits durch die umgekehrte Polung der Magnete zweier benachbarter π Lautsprecher im wesentlichen erreicht. Da aber die Streufelder der meisten Lautsprcchcrmagnete inhomogen und dazu noch von Lautsprecher zu Lautsprecher selbst einer Type stark schwankend sind, kann auf die Abschirmung des stärkeren nicht verzichtet werden, um wi dessen streuende Magnetfeldstärkc an den niehtabgcsehirmten Lautsprecher an/unassen.is required by means of a simple shield in the form of a cup over the permanent magnet of the dominant loudspeaker. k; mn this can be a simple, cost-effective solution, because the compensation of the resulting stray field is essentially achieved by reversing the polarity of the magnets of two adjacent π loudspeakers. However, since the stray fields of most loudspeaker magnets are inhomogeneous and also fluctuate greatly from loudspeaker to loudspeaker, even of one type, the shielding of the stronger one cannot be dispensed with, so that its scattering magnetic field strength can be connected to the unshielded loudspeaker.
Claims (1)
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 DE3213678A1 (en) | 1983-10-27 |
| DE3213678C2 true 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)
| 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 |
Families Citing this family (1)
| 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 |
Family Cites Families (5)
| 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 |
| GB479751A (en) * | 1936-08-05 | 1938-02-07 | John Edward Mead | Improvements in or relating to television receiving apparatus |
| DE757605C (en) * | 1937-10-21 | 1952-11-17 | Telefunken Gmbh | TV receiver with dynamic loudspeaker and Braunschweig tube |
| AT225765B (en) * | 1961-04-28 | 1963-02-11 | Akg Akustische Kino Geraete | Loudspeaker arrangement for televisions |
| DE8121124U1 (en) * | 1981-07-18 | 1982-01-07 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | TELEVISION RECEIVER FOR STEREOPHONE SOUND PLAYBACK |
-
1982
- 1982-04-14 DE DE19823213678 patent/DE3213678C2/en not_active Expired
Cited By (1)
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3213678A1 (en) | 1983-10-27 |
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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 |