DE3800855A1 - Vibration-compensated electrodynamic sound transducer drive - Google Patents

Vibration-compensated electrodynamic sound transducer drive

Info

Publication number
DE3800855A1
DE3800855A1 DE19883800855 DE3800855A DE3800855A1 DE 3800855 A1 DE3800855 A1 DE 3800855A1 DE 19883800855 DE19883800855 DE 19883800855 DE 3800855 A DE3800855 A DE 3800855A DE 3800855 A1 DE3800855 A1 DE 3800855A1
Authority
DE
Germany
Prior art keywords
drive
vibration
sound
sound transducer
compensated
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Withdrawn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
DE19883800855
Other languages
German (de)
Inventor
Joachim Rieder
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.)
SONDER KARL HEINZ
Original Assignee
SONDER KARL HEINZ
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 SONDER KARL HEINZ filed Critical SONDER KARL HEINZ
Priority to DE19883800855 priority Critical patent/DE3800855A1/en
Publication of DE3800855A1 publication Critical patent/DE3800855A1/en
Withdrawn legal-status Critical Current

Links

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
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • 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
    • 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
    • H04R1/2869—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself
    • H04R1/2892—Mountings or supports for transducers
    • H04R1/2896—Mountings or supports for transducers for loudspeaker transducers

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)

Abstract

The most frequently used sound transducer operates in accordance with the electrodynamic principle. These sound transducers have a negative characteristic which previously has never been taken into consideration and which has already presented insoluble problems to many a developer of loudspeakers. These problems are the enclosure vibrations caused by these sound transducers. These vibrations are caused in fact not only by the enclosed air but, above all, directly by the sound transducer itself. According to a physical law, each force generates a counterforce of the same magnitude. If, therefore, a force acts on the diaphragm out of the mass of the drive, then the same force acts out of the drive into the loudspeaker enclosure. Only a small proportion of this force is absorbed in the mass of the drive itself. The invention indicates how this reaction can be prevented with the aid of a second drive. The higher price for such a vibration-compensated sound transducer is easily compensated for by the simpler enclosure design and the better sound.

Description

Zweckpurpose

Es ist der Zweck der Erfindung, die Reaktion des Antriebs aus seiner eigenen Membranantriebskraft zu kompensieren, um Schwin­ gungen des Lautsprechergehäuses zu unterbinden.It is the purpose of the invention to determine the response of the drive its own diaphragm driving force to compensate for Schwin prevent the loudspeaker housing.

Anwendungapplication

An allen elektrodynamischen Schallwandlern, insbesondere im Tief- und Mitteltonbereich.On all electrodynamic transducers, especially in the low and midrange.

Stand der TechnikState of the art

Es gibt bisher keinen schwingungskompensierten elektrodynamischen Schallwandlerantrieb.So far, there is no vibration-compensated electrodynamic Sound converter drive.

Kritikcriticism

Es gibt unzählige Versuche, durch mechanische Konstruktion und Material des Lautsprechergehäuses, dieses am Schwingen zu hin­ dern. Wahrscheinlich ist die Annahme falsch, daß dieses Schwin­ gen durch die eingeschlossene Luft erzeugt wird. Denn eine offene Schallwand schwingt ebenfalls. Nach dem physikalischen Gesetz erzeugt jede Kraft eine gleich große Gegenkraft. Wenn also aus der Masse des Antriebsystems heraus eine Kraft auf die Membran eines Schallwandlers wirkt, so wird diese Kraft auf Masse des Antriebsystems in entgegengesetzter Richtung bewegen. Diese Bewe­ gung der Masse wird durch diese selbst zwar teilweise aufgefan­ gen, der weitaus größere Teil wirkt jedoch in das Lautsprecherge­ häuse ein.There are countless attempts, through mechanical construction and Material of the loudspeaker housing, this on swinging out other. It is probably wrong to assume that this swine is generated by the trapped air. Because an open one Baffle also swings. According to the physical law each force creates an equal counterforce. So if from the mass of the drive system exerts a force on the membrane of a transducer, this force is applied to the mass of the Move the drive system in the opposite direction. This move The mass itself is partially absorbed by this However, the much larger part affects the speaker area house one.

Lösungsolution

Erfindungsgemäß wird die Kraft, welche auf die Masse des An­ triebs und damit auf das Gehäuse wirkt, dadurch kompensiert, daß als erster Lösungvorschlag zwei gleichartige Schallwandler Rücken an Rücken in ein Gehäuse, einer nach vorn und einer nach hinten abstrahlend, eingebaut werden. Beide Schallwandler sind an ihrer Rückseite mechanisch starr miteinander verbunden. Durch die entgegengesetzte Bewegungsrichtung werden die Schwingungen der Antriebsmassen gegenseitig kompensiert, und gelangen nicht in das Gehäuse. Diese Lösung bietet sich im Baßbereich bis ca. 150 Hz an, weil hier noch keine Richtwirkung der Schallwellen vorhanden ist. Eine andere Lösung, im Prinzip gleich, jedoch auch für höhere Frequenzen einsetzbar, sieht so aus: an der Rückseite des Schallwandlers wird ein anderes Antriebssystem fest angebaut. Dieses Schwingungs-Kompensations-Antriebssystem hat jedoch keine Membran, sondern statt dieser eine Masse, die sich in ihrem Schwingungsverhalten so verhält, wie die Membran des eigentlichen Schallwandlers im Gehäuse, jedoch in entgegengesetzter Richtung. Auf diese Art werden die auf die Masse der Antriebssysteme wir­ kenden Kräfte ebenfalls gegenseitig kompensiert.According to the force on the mass of the An drives and thus acts on the housing, compensated by the fact that as a first solution, two similar sound transducers  Back to back in a case, one forward and one behind radiating behind, to be installed. Both sound converters are on their back mechanically rigidly connected. Through the opposite direction of motion are the vibrations of the Drive masses mutually compensated, and do not get into that Casing. This solution is available in the bass range up to approx. 150 Hz because there is no directivity of the sound waves is. Another solution, basically the same, but also for higher frequencies can be used, looks like this: on the back of the Another drive system is permanently attached to the transducer. However, this vibration compensation drive system has none Membrane, but instead of this a mass that is in their Vibration behavior behaves like the membrane of the actual one Sound transducer in the housing, but in the opposite direction. In this way we are based on the mass of drive systems mutually compensating forces.

Claims (5)

1. Dynamischer Schallwandlerantrieb, dadurch gekennzeichnet, daß dieser schwingungskompensiert ist.1. Dynamic sound transducer drive, characterized in that it is vibration-compensated. 2. Dynamischer Schallwanderantrieb nach 1., dadurch gekenn­ zeichnet, daß die Schwingungskompensation dadurch erreicht wird, daß ein gleichartiger Schallwandler, Rücken an Rücken starr verbunden, entgegengesetzt arbeitet.2. Dynamic sound migration drive according to 1., characterized thereby records that the vibration compensation is achieved by that a similar transducer, rigid back to back connected, works opposite. 3. Dynamischer Schallwandlerantrieb nach 1., dadurch gekenn­ zeichnet, daß die Schwingungskompensation durch ein zweites, Rücken an Rücken starr verbundenes dynamisches Antriebssystem erfolgt.3. Dynamic sound transducer drive according to 1., characterized records that the vibration compensation by a second, Back to back rigidly connected dynamic drive system he follows. 4. Dynamischer Schallwandlerantrieb nach 3., dadurch gekenn­ zeichnet, daß das schwingungskompensierende Antriebssystem an Stelle einer Membran eine keinen Schalldruck erzeugende Masse hat.4. Dynamic sound transducer drive according to 3, characterized indicates that the vibration compensating drive system Place a membrane that does not generate sound pressure Has. 5. Dynamischer Schallwandlerantrieb nach 4., dadurch gekenn­ zeichnet, daß das Schwingungsverhalten des schwingungskompensie­ renden Antriebssystems so ist, wie das Schwingungsverhalten des eigentlichen Schallwandlers in eingebautem Zustand in das Laut­ sprechergehäuse.5. Dynamic sound transducer drive according to 4, characterized records that the vibration behavior of the vibration compensation the drive system is like the vibration behavior of the actual transducer in the installed state in the sound speaker housing.
DE19883800855 1988-01-14 1988-01-14 Vibration-compensated electrodynamic sound transducer drive Withdrawn DE3800855A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19883800855 DE3800855A1 (en) 1988-01-14 1988-01-14 Vibration-compensated electrodynamic sound transducer drive

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19883800855 DE3800855A1 (en) 1988-01-14 1988-01-14 Vibration-compensated electrodynamic sound transducer drive

Publications (1)

Publication Number Publication Date
DE3800855A1 true DE3800855A1 (en) 1989-07-27

Family

ID=6345251

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19883800855 Withdrawn DE3800855A1 (en) 1988-01-14 1988-01-14 Vibration-compensated electrodynamic sound transducer drive

Country Status (1)

Country Link
DE (1) DE3800855A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019199369A1 (en) * 2018-04-13 2019-10-17 Microsoft Technology Licensing, Llc Method and system of varying mechanical vibrations at a microphone

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019199369A1 (en) * 2018-04-13 2019-10-17 Microsoft Technology Licensing, Llc Method and system of varying mechanical vibrations at a microphone
US10575110B2 (en) 2018-04-13 2020-02-25 Microsoft Technology Licensing, Llc Method and system of varying mechanical vibrations at a microphone
US10674295B2 (en) 2018-04-13 2020-06-02 Microsoft Technology Licensing, Llc Method and system of varying mechanical vibrations at a microphone
CN111955016A (en) * 2018-04-13 2020-11-17 微软技术许可有限责任公司 Method and system for altering mechanical vibrations at a microphone

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