EP0793216B1 - Druckkammertreiber - Google Patents

Druckkammertreiber Download PDF

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Publication number
EP0793216B1
EP0793216B1 EP97103076A EP97103076A EP0793216B1 EP 0793216 B1 EP0793216 B1 EP 0793216B1 EP 97103076 A EP97103076 A EP 97103076A EP 97103076 A EP97103076 A EP 97103076A EP 0793216 B1 EP0793216 B1 EP 0793216B1
Authority
EP
European Patent Office
Prior art keywords
compression
driver according
sound output
channel
channels
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
EP97103076A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0793216A3 (de
EP0793216A2 (de
Inventor
Svetlomir Alexandrov
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.)
Individual
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
Priority claimed from DE19626236A external-priority patent/DE19626236C2/de
Application filed by Individual filed Critical Individual
Publication of EP0793216A2 publication Critical patent/EP0793216A2/de
Publication of EP0793216A3 publication Critical patent/EP0793216A3/de
Application granted granted Critical
Publication of EP0793216B1 publication Critical patent/EP0793216B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
    • G10K9/13—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using electromagnetic driving means
    • 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 
    • H04R1/30—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; 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
    • H04R7/14—Non-planar diaphragms or cones corrugated, pleated or ribbed
    • 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
    • H04R9/06—Loudspeakers

Definitions

  • the invention relates to a pressure chamber driver the type mentioned in the preamble of claim 1.
  • Pressure chamber drivers are general known. They are used for reproduction in particular of high notes and exhibit one in a ring-shaped Air gap of a moving magnet system Voice coil that drives a membrane.
  • the membrane is with these known pressure chamber drivers dome-shaped and extends between Front edges of the voice coil. Opposite the The inside of the dome-shaped membrane runs with Distance a complementary to the membrane Surface of a solid body through which ' radiating channels from different places of the Pressure chamber to a central sound outlet channel extend there. Because the channels mentioned because of their Length the phase position of the in the sound outlet incoming sound will determine the Solid bodies with channels are often referred to as "phasing plug ".
  • dome-shaped membrane has a high mechanical Have stability so that by the pressures in the Deformations occurring in the pressure chamber remain small.
  • This high mechanical stability is often due to Use of metal foils or plastics with larger ones Material thickness reached. But this increases the mass of the membrane, so that a higher power is required, which is the efficiency decreased. This is especially true for higher ones Frequencies. If the membrane is lighter, what only due to reduced thickness or lighter material is achieved, so it is regularly less stiff, so that especially when playing high frequencies give rise to distortion have as a consequence.
  • a pressure chamber driver is the known in the preamble of claim 1, one in an annular air gap of a magnet system Movable voice coil, which drives an annular membrane.
  • An annular Pressure chamber is central with its circumference Sound outlet channel connected, which is designed as a horn is. The pressure of the pressure chamber is therefore whole simply fed directly into the horn and changes therefore in principle not its direction.
  • the magnet system is on the speaker funnel opposite side, which results in a considerable Overall length in the direction of sound emission results.
  • the invention has for its object a Print chamber driver specify an improved Efficiency, higher frequencies better and more distortion-free reproduces and in particular an essential shortened overall length.
  • the invention run from the pressure chamber an area evenly with respect to the voice coil distributes individual channels of the same length or a rotationally symmetrical one Channel to the central sound outlet channel. Because the annular pressure chamber on all places equal distance from the central Sound outlet channel has the same length of the individual channels in a simple manner, being a particularly convenient form of connection between the pressure chamber and the sound outlet channel through the rotationally symmetrical design of the connecting Channel is given. Due to the rotational symmetry the result is a circumferential one Gap between the pressure chamber and the sound outlet channel. So that the pressure chamber is at all points in the same form as the sound outlet channel connected so that there are no time differences and so that no impairments to the lifelike Rendering of sound result.
  • the channel from the membrane to the foot of the sound outlet channel is according to a development of the invention trapezoidal, such that all for Sound exit channel reaching the sound components have the same route. On the inclined surfaces of the Trapezoidal shape, the sound components are redirected, whereby the same route until you enter results in the sound outlet channel.
  • a partition is provided in the circumferential direction radial slots arranged side by side are located.
  • an acoustic lens that the Purpose is the sound from all membrane parts to Output of the pressure chamber driver and thus up to Input of a connected horn with minimal To lead loss. It becomes a flat acoustic Shaped wave that continues to the horn entrance.
  • the acoustic lens acoustic membrane / air transformation improved and thus an optimal membrane utilization is ensured.
  • the width of the slots can also be smaller than this value.
  • a particularly useful development of the invention consists of two annular membranes and pressure chambers in the direction of movement of the membranes are provided opposite, of which Pressure chambers each from an area opposite the Voice coil evenly distributed in the circumferential direction and alternately from one pressure chamber and single channels from the other pressure chamber run through a central sound outlet channel. at this embodiment are thus in the direction of movement of the membranes and thus in the axial direction of the Systems two pressure chamber systems according to the basic tenets compared to the invention and work at the corresponding Feeding each other. The one they created Sound pressure is then separated by the alternate once from one pressure chamber and once from the other pressure chamber coming from individual channels led to the central sound outlet channel. Added up there the sound pressure.
  • This arrangement is special advantageous if the two opposite Pressure chamber systems with different frequencies or frequency bands are fed so that each by the different frequencies or frequency bands requirements are taken into account can be.
  • the sound pressure is central Sound exit channel an assembly of the Sound pressures of the individual pressure chamber systems. Since the Sound waves through the respective membranes first in the direction of movement of the membrane, i.e. in the axial direction of the system and the central Sound outlet channel is located radially within it inevitably results in any case partially radial course of the individual pressure chambers with channels connecting the central sound outlet channel. The sound waves are the same in this area directed. It is therefore possible that those of the Pressure chambers leading away channels in this area at least partially a common rotationally symmetric Form channel.
  • Fig. 1 shows a print chamber driver with a Magnet system 1, in the air gap 2, a voice coil 3 is arranged movably, one end edge with a tip 4 of a V-shaped design Membrane 5 is connected to its outer flexible Edges 6 and 7 firmly with the inner wall of a outer ring 8 and the outer wall of an inner Ring 9 are connected.
  • a also V-shaped pressure chamber 12 formed in Area of the tip of the Vs over a rotationally symmetrical Channel 13, which is practically one over the forms the entire circumferential gap, with a Sound outlet channel 14 is connected, the bottom 15 is conical.
  • the voice coil 3 When the voice coil 3 is powered, it moves the Membrane 5 preferably in the central region of the annular Pressure chamber 12, so that in the pressure chamber 12 pressure vibrations formed over the gap-shaped Channel 13 in the area of the conical Bottom 15 of the sack-shaped sound outlet channel 14 are transmitted.
  • FIG. 2 and 3 serve to illustrate a modification of the embodiment according to FIG. 1.
  • FIG. 2 is an enlarged partial section of the left half of FIG. 1 in a somewhat different representation.
  • the same or corresponding parts are provided with the same reference numbers.
  • the modification consists in that a partition 16 is provided in the direction of radiation in front of the membrane 5, which seals off the space in front of the membrane, but has radial slots.
  • Fig. 3 shows the partition 16 of FIG. 2 in an individual representation, partially cut away, so that radial slots 17 are clearly visible, which represent passages for the sound emitted by the membrane 5.
  • the slots 17 are arranged closely next to one another in the circumferential direction.
  • An acoustic lens is thus formed overall, which ensures the formation of a flat sound wave, which then continues as far as the sound exit channel 14.
  • the channel 13 is trapezoidal and has inclined surfaces 17 and 18. Dashed lines S 0 , S 1 and S 2 make it clear that sound components emerging from the slots 17 are deflected on the inclined surfaces 17 and 18 and, as a result, pass through the same paths until they enter the sound outlet channel 14. The same naturally applies to the other half of the pressure chamber system shown. This results in a flat sound wave at the foot of the sound exit channel 14, which then continues even up to the mouth of the sound exit channel 14. This results in an effective radiation in relation to the power applied by the membrane 5.
  • FIG. 4 shows a representation similar to that of FIG. 2 an embodiment of the invention. Same or corresponding parts have the same reference numerals Mistake.
  • the difference to Fig. 2 is in that in the axial direction with respect to the membrane 5 a membrane 20 is arranged by a Voice coil 21 driven and in front of a pressure chamber 22 is formed with a via a channel 23 the central sound outlet channel 14 is connected.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
EP97103076A 1996-02-29 1997-02-26 Druckkammertreiber Expired - Lifetime EP0793216B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19607610 1996-02-29
DE19607610 1996-02-29
DE19626236 1996-06-29
DE19626236A DE19626236C2 (de) 1996-02-29 1996-06-29 Druckkammertreiber

Publications (3)

Publication Number Publication Date
EP0793216A2 EP0793216A2 (de) 1997-09-03
EP0793216A3 EP0793216A3 (de) 1999-11-17
EP0793216B1 true EP0793216B1 (de) 2003-11-19

Family

ID=26023324

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97103076A Expired - Lifetime EP0793216B1 (de) 1996-02-29 1997-02-26 Druckkammertreiber

Country Status (3)

Country Link
US (1) US5878148A (es)
EP (1) EP0793216B1 (es)
ES (1) ES2210407T3 (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104811874A (zh) * 2015-03-16 2015-07-29 朱幕松 W型扬声器

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6466680B1 (en) * 1999-10-19 2002-10-15 Harman International Industries, Inc. High-frequency loudspeaker module for cinema screen
ITPR20020064A1 (it) * 2002-10-31 2004-05-01 Aeb Srl Equalizzatore, o phase plug, per trasduttori elettroacustici.
US20080192972A1 (en) * 2007-02-13 2008-08-14 Vernon Lewallen Phasing plug for acoustic compression drivers
GB2455563B (en) * 2007-12-14 2012-03-21 Tannoy Ltd Acoustical horn
US8077897B2 (en) 2008-06-11 2011-12-13 Harman International Industries, Incorporated Phasing plug
US8280091B2 (en) * 2008-06-11 2012-10-02 Harman International Industries, Incorporated Dual compression drivers and phasing plugs for compression drivers
JP5268203B2 (ja) 2008-08-14 2013-08-21 ハーマン インターナショナル インダストリーズ インコーポレイテッド 直接放射ラウドスピーカのためのフェイズプラグおよび音響レンズ
DE102010015445B4 (de) 2010-04-17 2012-10-25 Arne Färber Koaxiallautsprecher
DE102012102207B3 (de) 2012-03-15 2013-08-29 BMS Speakers GmbH Ringmembran-Kompressionstreiber
US9693148B1 (en) 2014-08-08 2017-06-27 Lrad Corporation Acoustic hailing device
US10271131B2 (en) 2014-10-08 2019-04-23 Harman International Industries, Incorporated Shallow profile compression driver
US10038954B2 (en) 2016-08-22 2018-07-31 Harman International Industries, Incorporated Compression driver and phasing plug assembly therefor
US10327068B2 (en) * 2017-11-16 2019-06-18 Harman International Industries, Incorporated Compression driver with side-firing compression chamber
US11611830B2 (en) 2018-09-19 2023-03-21 Polk Audio, Llc Audio transducer with forced ventilation of motor and method

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2607198C2 (de) * 1976-02-23 1984-02-16 Fernsprech- und Signalbau Lehner & Co KG, 4330 Mülheim Dynamisches Antriebssystem für Druckkammer-Lautsprecher
JPS53124413A (en) * 1977-12-02 1978-10-30 Nippon Gakki Seizo Kk Horn type speaker
IT1154054B (it) * 1980-01-30 1987-01-21 Radio Cine Forniture Rcf Spa Trasduttore elettroacustico
US4325456A (en) * 1980-10-10 1982-04-20 Altec Corporation Acoustical transformer for compression-type loudspeaker with an annular diaphragm
US4496021A (en) * 1983-02-18 1985-01-29 Emmanuel Berlant 360 Degree radial reflex orthospectral horn for high-frequency loudspeakers
FR2607344B1 (fr) * 1986-11-21 1994-04-29 Nexo Distribution Dispositif de traitement d'un signal electrique audiofrequence
GB8724299D0 (en) * 1987-10-16 1987-11-18 Adamson Acoustic Design Corp Loudspeaker design
JP2673002B2 (ja) * 1989-03-31 1997-11-05 株式会社ケンウッド スピーカシステム
US5537481A (en) * 1994-04-05 1996-07-16 The Aws Group, Inc. Horn driver
DE4420960A1 (de) * 1994-06-16 1995-12-21 Bosch Gmbh Robert Pumpvorrichtung, insbesondere für ein Tanksystem einer Brennkraftmaschine
FR2735646B1 (fr) * 1995-06-16 1997-08-22 Phl Audio Haut-parleur pour frequences elevees

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104811874A (zh) * 2015-03-16 2015-07-29 朱幕松 W型扬声器
CN104811874B (zh) * 2015-03-16 2017-11-03 朱幕松 W型扬声器

Also Published As

Publication number Publication date
EP0793216A3 (de) 1999-11-17
US5878148A (en) 1999-03-02
EP0793216A2 (de) 1997-09-03
ES2210407T3 (es) 2004-07-01

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