EP0491139A2 - 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
EP0491139A2
EP0491139A2 EP19910118025 EP91118025A EP0491139A2 EP 0491139 A2 EP0491139 A2 EP 0491139A2 EP 19910118025 EP19910118025 EP 19910118025 EP 91118025 A EP91118025 A EP 91118025A EP 0491139 A2 EP0491139 A2 EP 0491139A2
Authority
EP
European Patent Office
Prior art keywords
diaphragm
degrees
aperture angles
electroacoustic transducer
aperture angle
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
EP19910118025
Other languages
German (de)
French (fr)
Other versions
EP0491139A3 (en
EP0491139B1 (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
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0491139A2 publication Critical patent/EP0491139A2/en
Publication of EP0491139A3 publication Critical patent/EP0491139A3/en
Application granted granted Critical
Publication of EP0491139B1 publication Critical patent/EP0491139B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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; 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.
  • 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.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Piezo-Electric Transducers For Audible Bands (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. 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 verwendet werden, und zwar die Winkel 163,157,140,114,98, 82 und 66 grad.The invention relates to a membrane for electroacoustic transducers, in particular loudspeakers and headphones. 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.

Es sind bereits Membranformen bekannt, die oberflächlich gesehen ähnlich ausschauen und sich aus mehreren Konen zusammensetzen (Deutschland Pat. 899048, Frankreich Pat. 1251,411, GB 369.992). 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.Membrane shapes are already known which, on the surface, look similar and are composed of several cones (Germany Pat. 899048, France Pat. 1251.411, GB 369.992). 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.

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 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 grundlgend 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).

Claims (1)

1. Membran für elektroakustischen Wandler, dadurch gekennzeichnet, daß die Membran, welche sich auch zu einer Kalotte schließen kann, sich aus zwei oder mehreren Konen mit Öffnungswinkeln von 163, 157, 140, 114, 98, 82 oder 66 grad zusammensetzt und durch die zwei- oder mehrfache Kombination einzelner dieser Öffnungswinkel ein Zerfallsspektrum erzeugt, das dem des menschlichen Hörapparates ähnlich ist, wodurch ein natürlicher Klangeindruck erzeugt wird.1. Membrane for electroacoustic transducers, characterized in that the membrane, which can also form a dome, is composed of two or more cones with opening angles of 163, 157, 140, 114, 98, 82 or 66 degrees and through which two or more combinations of individual opening angles produce a decay spectrum which is similar to that of the human hearing apparatus, as a result of which a natural sound impression is produced.
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
AT2153/90 1990-10-25
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

Publications (3)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0667730A1 (en) * 1994-02-14 1995-08-16 Karl Mantinger Electrodynamic transducer of polar type with vibratory body

Citations (3)

* 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
DE899048C (en) * 1950-05-04 1953-12-07 Adelbert Stephan Loudspeaker with tilt-free multi-cone membrane
US3955055A (en) * 1974-01-31 1976-05-04 Sony Corporation Dynamic loudspeaker

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR844211A (en) * 1938-03-31 1939-07-20 Improvements to sound reproducing devices such as loudspeakers
FR1251411A (en) * 1959-12-10 1961-01-20 D Applic Radio Electr Soc Ind Improvements to speaker membranes
JPS531517A (en) * 1976-06-25 1978-01-09 Kenzou Inoue Dynamic speaker and method of producing same

Patent Citations (3)

* 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
DE899048C (en) * 1950-05-04 1953-12-07 Adelbert Stephan Loudspeaker with tilt-free multi-cone membrane
US3955055A (en) * 1974-01-31 1976-05-04 Sony Corporation Dynamic loudspeaker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0667730A1 (en) * 1994-02-14 1995-08-16 Karl Mantinger Electrodynamic transducer of polar type with vibratory body

Also Published As

Publication number Publication date
EP0491139A3 (en) 1993-01-13
EP0491139B1 (en) 1994-07-06
ATE108289T1 (en) 1994-07-15
ATA215390A (en) 1993-04-15
AT396859B (en) 1993-12-27
DE59102121D1 (en) 1994-08-11

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