EP0491139B1 - Diaphragm for electroacoustic transducer with discontinuous variation of the aperture angle - Google Patents

Diaphragm for electroacoustic transducer with discontinuous variation of the aperture angle Download PDF

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Publication number
EP0491139B1
EP0491139B1 EP91118025A EP91118025A EP0491139B1 EP 0491139 B1 EP0491139 B1 EP 0491139B1 EP 91118025 A EP91118025 A EP 91118025A EP 91118025 A EP91118025 A EP 91118025A EP 0491139 B1 EP0491139 B1 EP 0491139B1
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EP
European Patent Office
Prior art keywords
diaphragm
degrees
aperture angles
membrane
suspension
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 - Lifetime
Application number
EP91118025A
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German (de)
French (fr)
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EP0491139A2 (en
EP0491139A3 (en
Inventor
Dieter Ennemoser
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.)
ENNEMOSER, DIETER
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Individual
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Publication date
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Publication of EP0491139A2 publication Critical patent/EP0491139A2/en
Publication of EP0491139A3 publication Critical patent/EP0491139A3/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/127—Non-planar diaphragms or cones dome-shaped

Definitions

  • the invention relates to a membrane for electroacoustic transducers, in particular loudspeakers and headphones.
  • NAWI curved
  • DE-C-899 048 (Adelbert Stephan) discloses an arrangement with the same mass distribution in front of and behind the membrane suspension in order to avoid tilting vibrations.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

The invention is a diaphragm for electroacoustic transducers with the object of approximating the decay spectrum (postoscillation) of the diaphragm to the decay spectrum of the human auditory apparatus. For this purpose, the diaphragm is to be constructed from at least two cones with different aperture angles. The applicable aperture angles are 163, 157, 140, 114, 98, 82 and 66 degrees. A more natural and pleasant sound impression is produced by the coincidence of the characteristic oscillations of the ear with the characteristic oscillations of the transducer. Overview of the figures: Figure 1: Cross-section of the diaphragm with the aperture angles alpha = 140 degrees and beta = 114 degrees (1) = suspension (2) = drive (3) = diaphragm Figure 2: Cross-section through a concave diaphragm with the aperture angles 114 degrees, 140 degrees and 157 degrees. (1) = suspension (2a), (2b) two possible drive types as examples (3) = diaphragm <IMAGE>

Description

Die Erfindung bezieht sich auf eine Membran für elektroakustische Wandler, insbesondere Lautsprecher und Kopfhörer.The invention relates to a membrane for electroacoustic transducers, in particular loudspeakers and headphones.

Es sind bereits Membranformen bekannt, die oberflächlich gesehen ähnlich ausschauen und sich aus mehreren Konen zusammensetzen.Membrane shapes are already known which look similar on the surface and are composed of several cones.

Die GB-A-369 992 (PERSSON E,O.) offenbart, dass das Verhältnis Steifheit zu Masse pro Flächeneinheit vom Zentrum nach außen kontiuierlich zu verringern. Damit soll eine kontinuierliche Veränderung der Teilschwingungen (Partialschwingungen) vom Zentrum nach außen hin erreicht werden. Duch diese Maßnahme erwartet man sich eine Linearisierung des Amplitudenfrequenzgangs.GB-A-369 992 (PERSSON E, O.) Discloses that the ratio of stiffness to mass per unit area continuously decreases from the center to the outside. This is intended to achieve a continuous change in the partial vibrations (partial vibrations) from the center to the outside. This measure is expected to linearize the amplitude frequency response.

Übrigens baut man aus ähnlichem Grunde gewölbte (NAWI-) Membranen oder Membranen deren Wölbung sich kontinuierlich ändert.Incidentally, for similar reasons you build curved (NAWI) membranes or membranes whose curvature changes continuously.

Die DE-C-899 048 (Adelbert Stephan) offenbart eine Anordnung mit gleicher Massenverteilung vor und hinter der Membranaufhängung, um Kippschwingungen zu vermeiden.DE-C-899 048 (Adelbert Stephan) discloses an arrangement with the same mass distribution in front of and behind the membrane suspension in order to avoid tilting vibrations.

Die US-A-3 955 055 (Kawakami et al.) offenbart eine Zusammengesetzte, kalottenartige Membran aus konkav- und konvex gewölbten Teilen.
Diese Patente beziehen sich jedoch nicht auf bestimmte Winkel und verfolgen außerdem eine gänzlich andere Zielsetzung.. Diese Zielsetzung ist eine gleichmäßige Wiedergabe aller Tonfrequenzen, wobei aus meßtechnischer Sicht schon gute Erfolge erzielt wurden.US-A-3 955 055 (Kawakami et al.) Discloses a composite dome-like membrane made of concave and convex parts.
However, these patents do not relate to specific angles and also pursue a completely different objective. This objective is an even reproduction of all sound frequencies, and good results have already been achieved from a measurement point of view.

Die Form dieser Membran setzt sich aus mindestens zwei Konen unterschiedlichen Öffnungswinkels zusammen, wobei sich die Konen auch kalottenartig schließen können. Wesentlich für die Erfindung ist, daß nur ganz bestimmte Öffnungswinkel verwendetwerden, und zwar die Winkel 163,157,140,114,98, 82 und 66 grad. Das Neue der vorliegenden Patentanmeldung ist, daß durch die Membrangeometrie ein unregelmäßig strukturiertes Amplitudenverhalten und Ausschwingverhalten (Zerfallsspektrum) erzeugt wird, welches den materialbedingten Eigenschaften des menschlichen Hörapparates ähnlich ist. Stimmt das Zerfallsspektrum der Membran mit dem Zerfallsspektrum des Ohres überein, so wird das Nachschwingen von Teilen der Membran (Partialschwingungen) nicht mehr als Verfärbung wahrgenommen und es entsteht ein natürlicher Klangeindruck. Durch jahrelange Forschungen konnte ich empirisch jene Konuswinkel bestimmen, die diesem erwünschten Verhalten entsprechen.The shape of this membrane is composed of at least two cones of different opening angles, the cones also being able to close in a dome-like manner. It is essential for the invention that only very specific opening angles are used, namely the angles 163, 157, 140, 114, 98, 82 and 66 degrees. The novelty of the present patent application is that the membrane geometry produces an irregularly structured amplitude behavior and decay behavior (decay spectrum), which is similar to the material-related properties of the human hearing apparatus. If the decay spectrum of the membrane matches the decay spectrum of the ear, the reverberation of parts of the membrane (partial vibrations) is no longer perceived as discoloration and a natural sound impression is created. Through years of research, I was able to empirically determine the cone angles that correspond to this desired behavior.

Eine ausführlichere Erklärung der grundigend neuen Theorie der Klangwahrnehmung bringt das beiliegende Buch "Das Maß des Klanges" vom Patentanmelder (ISBN 3-907073-32-0).A more detailed explanation of the fundamentally new theory of sound perception is provided in the accompanying book "The measure of sound" by the patent applicant (ISBN 3-907073-32-0).

Figurenübersicht:Figure overview:

  • Figur 1: Querschnitt durch Membran mit den Öffnungswinkeoln alpha = 140 grad und beta = 114 grad
    • (1) = Aufhängung
    • (2) = Antrieb
    • (3) = Membran
    Figure 1: Cross section through membrane with the opening angles alpha = 140 degrees and beta = 114 degrees
    • (1) = suspension
    • (2) = drive
    • (3) = membrane
  • Figur 2: Querschnitt durch kalottenähnliche Membran mit den Öffnungswinkeln 114 grad, 140 grad und 157 grad.
    • (1) = Aufhängung
    • (2a),(2b) zwei mögliche Antriebsarten als Beispiel
    • (3) = Membran
    Figure 2: Cross section through dome-like membrane with the opening angles 114 degrees, 140 degrees and 157 degrees.
    • (1) = suspension
    • (2a), (2b) two possible drive types as an example
    • (3) = membrane

Die Erfindung ist eine Membran für elektroakustische Wandler mit der Zielsetzung, das Zerfallsspektrum (Nachschwingen) der Membran dem Zerfallsspektrum des menschlichen Hörapparates anzunähern. Dazu ist die Membran aus mindestens zwei Konen mit unterschiedlichen Öffnungswinkeln zu konstruieren. Die anwendbaren Öffnungswinkel sind 163, 157, 140, 114, 98. 82 und 66 grad. Durch das Zusammenfallen der Eigenschwingungen des Ohres mit den Eigenschwingungen des Wandlers ergibt sich ein natürlicherer und angenehmerer Klangeindruck.The invention is a membrane for electroacoustic transducers with the aim of bringing the decay spectrum (ringing) of the membrane closer to the decay spectrum of the human hearing apparatus. For this purpose, the membrane must be constructed from at least two cones with different opening angles. The applicable opening angles are 163, 157, 140, 114, 98, 82 and 66 degrees. The coincidence of the natural vibrations of the ear with the natural vibrations of the transducer results in a more natural and pleasant sound impression.

Claims (1)

1. Diaphragm for electroacustic transducer characterized in that the diaphragram (3), which can also close to become a calotte, is composed of two or several cones with aperture angles of 163, 157, 140, 114, 98, 82, or 66 degrees of angle and can produce, through double or multiple combination of some of these aperture angles, a decay spectrum which is similar to that in the human auditory organ thus creating a sensation of natural tonality.
EP91118025A 1990-10-25 1991-10-23 Diaphragm for electroacoustic transducer with discontinuous variation of the aperture angle Expired - Lifetime EP0491139B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0215390A AT396859B (en) 1990-10-25 1990-10-25 MEMBRANE FOR AN ELECTRO-ACOUSTIC TRANSFORMER WITH A CONTINUOUS CHANGE OF THE OPENING ANGLE FOR THE ADAPTATION TO THE HEARING FUNCTION
AT2153/90 1990-10-25

Publications (3)

Publication Number Publication Date
EP0491139A2 EP0491139A2 (en) 1992-06-24
EP0491139A3 EP0491139A3 (en) 1993-01-13
EP0491139B1 true EP0491139B1 (en) 1994-07-06

Family

ID=3528906

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91118025A Expired - Lifetime EP0491139B1 (en) 1990-10-25 1991-10-23 Diaphragm for electroacoustic transducer with discontinuous variation of the aperture angle

Country Status (3)

Country Link
EP (1) EP0491139B1 (en)
AT (2) AT396859B (en)
DE (1) DE59102121D1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1276265B1 (en) * 1994-02-14 1997-10-28 Karl Mantinger POLAR TYPE ELECTRODYNAMIC TRANSDUCER WITH VIBRATING BODY.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB369992A (en) * 1929-12-19 1932-03-21 Ernst Oscar Persson An acoustic diaphragm
FR844211A (en) * 1938-03-31 1939-07-20 Improvements to sound reproducing devices such as loudspeakers
DE899048C (en) * 1950-05-04 1953-12-07 Adelbert Stephan Loudspeaker with tilt-free multi-cone membrane
FR1251411A (en) * 1959-12-10 1961-01-20 D Applic Radio Electr Soc Ind Improvements to speaker membranes
JPS574160B2 (en) * 1974-01-31 1982-01-25
JPS531517A (en) * 1976-06-25 1978-01-09 Kenzou Inoue Dynamic speaker and method of producing same

Also Published As

Publication number Publication date
EP0491139A2 (en) 1992-06-24
EP0491139A3 (en) 1993-01-13
ATA215390A (en) 1993-04-15
ATE108289T1 (en) 1994-07-15
AT396859B (en) 1993-12-27
DE59102121D1 (en) 1994-08-11

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