EP0529143A2 - Membrane pour hautparleur ou microphone - Google Patents

Membrane pour hautparleur ou microphone Download PDF

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Publication number
EP0529143A2
EP0529143A2 EP91114883A EP91114883A EP0529143A2 EP 0529143 A2 EP0529143 A2 EP 0529143A2 EP 91114883 A EP91114883 A EP 91114883A EP 91114883 A EP91114883 A EP 91114883A EP 0529143 A2 EP0529143 A2 EP 0529143A2
Authority
EP
European Patent Office
Prior art keywords
horn
membrane
loudspeaker
coil
formulas
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Withdrawn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
EP91114883A
Other languages
German (de)
English (en)
Other versions
EP0529143A3 (en
Inventor
Filip Keller
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.)
KELLER, FILIP
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP19910114883 priority Critical patent/EP0529143A3/de
Publication of EP0529143A2 publication Critical patent/EP0529143A2/fr
Publication of EP0529143A3 publication Critical patent/EP0529143A3/de
Withdrawn legal-status Critical Current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; ELECTRIC HEARING AIDS; 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 
    • H04R1/30—Combinations of transducers with horns, e.g. with mechanical matching means, i.e. front-loaded horns
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers

Definitions

  • the invention relates to a loudspeaker or a microphone according to patent claims 1 and 11 and the advantageous subclaims relating to them.
  • the present invention is based on the object of constructing a loudspeaker or a microphone of the type mentioned at the outset in such a way that over a large frequency range, distortion-free sound radiation or sound recording without volume drop is possible with little manufacturing effort.
  • the invention provides that the transverse surface of the membrane (4) increases continuously and / or in steps with increasing distance from the center depending on the distance from the center. In this way it can be achieved that the entire audible range from approximately 20 Hz to 20,000 Hz can be transmitted with a single membrane without a drop in volume.
  • the rotationally symmetrical structure creates a basic prerequisite for good omnidirectional or recording behavior at all frequencies.
  • An optimal sound radiation or absorption property is achieved if the transverse surface of the membrane (4) increases quadratically with the distance from the center.
  • the voice coil and the coil carrier can be designed with a constant minimum thickness and only the membrane body can be designed with an increasing transverse surface depending on the distance from the center.
  • the membrane can particularly advantageously consist of a wedge horn and at least one second layer connected to it.
  • the transverse surface of the membrane body according to formulas I and II can then increase with the distance from the center, preferably after a certain minimum distance.
  • one layer can be provided on each side, the increase in the transverse surface depending on the distance from the center being chosen differently for the two layers.
  • an optimal omnidirectional behavior with excellent efficiency can be achieved in that the circumference of the membrane part, which emits a certain sound frequency, is smaller than the wavelength of the emitted frequency in air, the membrane body being designed as a horn and the membrane preferably as a horn. This ensures that the high frequencies are emitted in the area near the center and the low frequencies are emitted from the entire membrane surface, i.e. only the membrane areas in the vicinity of the voice coil emit high frequencies, the rest of the membrane lying further outside is no longer excited by the damping. Medium frequencies also excite membrane areas located further out. From a limit frequency, the entire membrane surface vibrates practically uniformly as a piston oscillator.
  • this can have an increasing transverse surface with increasing distance from its voice coil in order to optimize the sound radiation.
  • the horn-shaped design of the voice coil body preferably made of superconducting material, forms a broadband, non-frequency-selective spectrum of natural resonances in it.
  • the efficiency is very high because, compared to conventional horn constructions with flat membrane bodies or wedge membranes, the adaptation (coupling) of the coil body to the membrane body unit consisting of coil, coil carrier and membrane body takes place mathematically and physically exactly. In this way, the maximum physical sound radiation is reached because the resonance occurs for all frequencies in the bandpass range and therefore approximately 100 percent of the total sound energy is transmitted.
  • the following integrated mode of operation results:
  • the air "loads” in the horn optimally on the membrane, the membrane body is designed in such a way that it optimally “loads” as a horn on the coil carrier and coil, and the coil swings "in itself “even optimal as a horn.
  • the increase in efficiency due to the horn-shaped membrane body and the associated reduction in linear and non-linear distortion corresponds to that of a horn loudspeaker in comparison to a conventional loudspeaker.
  • Centering spider (3) and corrugation (5) are subject to the same natural laws, according to which the shaft wants to take up 4 times the surface at twice the distance from the origin, and are therefore also designed as a horn, which from the component change or media change between the unit of Coil, coil carrier, membrane (1,2,4) and bead or coil, coil carrier, membrane (1,2,4) and spider each start with F1.
  • horn coil (1) horn coil holder (2) and membrane body horn (4), ie in the horn-shaped Structures of membrane, coil carrier and coil.
  • horn coil holder (2) horn coil holder (2)
  • membrane body horn (4) ie in the horn-shaped Structures of membrane, coil carrier and coil.
  • Centering spider (3) and bead (5) are flanking components that support this electro-acoustic mechanism of action.
  • This space between the surfaces F1 and F2 in the causal interaction with them is designed in such a way that the same conditions are created for all sound waves to be picked up and emitted at different frequencies - a freely selectable bandpass range.
  • the frequency response of the L or M is very balanced.
  • the efficiency of the loudspeaker is so variable due to its air-enclosing shape and the shape of its horn-shaped membrane body that any frequency-dependent efficiency can be achieved with these two factors.
  • Partial vibrations of the air in front of the membrane are prevented by the membrane body being so horn-shaped that the air is only excited to vibrate by a membrane surface, the circumference of which is smaller than, at most equal to the wavelength of this frequency in air.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
EP19910114883 1991-08-30 1991-08-30 Diaphragm for loudspeaker or microphone Withdrawn EP0529143A3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19910114883 EP0529143A3 (en) 1991-08-30 1991-08-30 Diaphragm for loudspeaker or microphone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19910114883 EP0529143A3 (en) 1991-08-30 1991-08-30 Diaphragm for loudspeaker or microphone

Publications (2)

Publication Number Publication Date
EP0529143A2 true EP0529143A2 (fr) 1993-03-03
EP0529143A3 EP0529143A3 (en) 1993-07-07

Family

ID=8207109

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910114883 Withdrawn EP0529143A3 (en) 1991-08-30 1991-08-30 Diaphragm for loudspeaker or microphone

Country Status (1)

Country Link
EP (1) EP0529143A3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1555849A3 (fr) * 2004-01-15 2007-03-07 Bose Corporation Radiateur passif acoustique avec réduction des modes de basculement
CN109678392A (zh) * 2019-01-25 2019-04-26 歌尔股份有限公司 二氧化硅气凝胶吸音材料和发声装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125647A (en) * 1964-03-17 Frequency-o cycles sec
US2956636A (en) * 1956-06-11 1960-10-18 Sipko L Boersma Loudspeaker
GB1224475A (en) * 1968-01-13 1971-03-10 Mario Cesati Compression chamber loudspeakers
US3862376A (en) * 1973-01-19 1975-01-21 Stanley F White Cone construction for loudspeaker
JPS5843091U (ja) * 1981-09-17 1983-03-23 澤藤　正 電気音響変換器用振動板
DE3831376A1 (de) * 1988-09-15 1990-03-22 Filip Keller Lautsprecher oder mikrofon
DE3838853C1 (fr) * 1988-09-30 1989-11-30 Ant Nachrichtentechnik Gmbh, 7150 Backnang, De
FR2655507A1 (fr) * 1989-12-04 1991-06-07 Fabricanti Luc Haut-parleur a pavillon.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1555849A3 (fr) * 2004-01-15 2007-03-07 Bose Corporation Radiateur passif acoustique avec réduction des modes de basculement
US7568552B2 (en) 2004-01-15 2009-08-04 Bose Corporation Acoustic passive radiator rocking mode reducing
CN109678392A (zh) * 2019-01-25 2019-04-26 歌尔股份有限公司 二氧化硅气凝胶吸音材料和发声装置

Also Published As

Publication number Publication date
EP0529143A3 (en) 1993-07-07

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