EP0763310A1 - Loudspeaker, in particular in the form of a column - Google Patents
Loudspeaker, in particular in the form of a columnInfo
- Publication number
- EP0763310A1 EP0763310A1 EP95923208A EP95923208A EP0763310A1 EP 0763310 A1 EP0763310 A1 EP 0763310A1 EP 95923208 A EP95923208 A EP 95923208A EP 95923208 A EP95923208 A EP 95923208A EP 0763310 A1 EP0763310 A1 EP 0763310A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- loudspeaker
- reflector body
- axis
- loudspeaker according
- rotation
- 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
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
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
- H04R1/345—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for loudspeakers
Definitions
- the invention relates to a loudspeaker, in particular in the form of a column, with at least one electroacoustic transducer, in particular in the version as a three-way system, to which a reflector body for all-round sound radiation is assigned, the reflector body essentially having a cone shape and the cone tip of the electroacoustic transducer, in particular a tweeter or midrange is arranged opposite.
- Such speakers are known for example from DE-GM 87 00 649 and DE-GM 92 05 731.
- a construction with a conical reflector body in particular for a tweeter of a three-way loudspeaker, is used primarily because the radiation characteristic bundles with increasing frequency, so that conventional electroacoustic transducers can be located precisely in the high frequency range.
- diffusion or reflection cones are used so that the all-round sound radiation is modeled on the real sound behavior. Because the sound is radiated all around and not only in the direction of the listener, reflections occur on the walls of the listening room, which are delayed in mixing with the direct sound. This indirect sound wave distribution creates a largely natural auditory impression.
- the object of the invention is to create a loudspeaker, in particular in the form of a column, with which a different sound wave distribution with a certain directional characteristic or preferred sound emission direction can be achieved with all-round sound radiation.
- the design of the reflector body with an asymmetrical conical surface with respect to the center line of the loudspeaker ensures that the electroacoustic transducer sonicates the flatter conical part to a greater extent and that the larger reflection surface thus formed results in a preferred direction of sound emission.
- the steeper cone part and the stepless transitions between the flatter and steeper cone parts are also sonicated at the same time, there is still an all-round sound radiation with natural sound behavior.
- the reflector body acts like a wall of a horn or funnel loudspeaker, whereby the asymmetrical "horn cone" on the flatter and steeper cone part creates different horn lengths, which means that a wide frequency spectrum reaches the listener directly and a definable portion is used for reflection.
- the sound wave distribution ie a deviation from the completely identical all-round sound radiation, results in a simple manner in that the conical tip of the reflector body is offset by a certain eccentricity with respect to the loudspeaker center axis.
- This eccentricity can be chosen arbitrarily depending on the desired non-uniformity of the all-round sound radiation, but an eccentricity corresponding to approximately half the radius of the opposing sound transducer, in particular the tweeter, has proven to be expedient.
- the reflector body has an inclination of approximately 30 ° in its flatter cone part, while the steeper cone part has an inclination of approximately 45 °.
- the reflector body can be rotated or pivoted about a parallel axis of rotation with respect to the loudspeaker central axis.
- the stronger sound radiation occurring on the flatter conical surface can be changed in the direction, so that the directional characteristic of the sound radiation can be changed compared to the uniform omnidirectional radiation, depending on the listener's request.
- the preferred direction of sound emission can be set exactly to a preferred listening position, in particular in the middle of two stereo speakers, the two speakers, as is customary in stereo playback, forming an isosceles triangle together with the listening position.
- the preferred listening position e.g. B. an armchair
- an all-round sound radiation is achieved with stepless, continuous transitions over the less flat cone parts. This makes it possible to adjust and control the volume of sound or the fullness of the sound of the loudspeaker system to the respective listener's wishes.
- the asymmetrical, conical reflector body can be adjusted manually, but also by means of a remote control.
- the drive motor is preferably arranged within the reflector body, so that a particularly space-saving solution results.
- the positioning of the reflection body, in particular the cone tip with respect to the opposite electroacoustic transducer can be changed by rotating the reflection body.
- it is also possible to change the relative position between the two mutually associated parts, namely the transducer and the reflection body by rotating or shifting the transducer, in particular the tweeter.
- the tweeter can also be accommodated in an eccentric bearing and rotated with respect to the reflector body, so that there is also a changed sound emission characteristic.
- Figure 1 is a side view with a partial sectional view of a loudspeaker in column shape with an asymmetrical reflector body.
- 2 shows a plan view of the asymmetrical reflector body with an adjusting device;
- Fig. 3 is a plan view of two spaced speakers to illustrate the
- Fig. 4 shows a preferred embodiment of a loudspeaker.
- Fig. 1 the upper region of a loudspeaker 1 is shown in side view in a partial sectional view.
- the loudspeaker 1 is designed in the form of a column, with a column 2 in the upper area receiving an electroacoustic transducer 4, in particular a tweeter.
- This transducer 4 in particular in the form of a dome tweeter, irradiates a conical reflector body 5, on which the sound waves are emitted all around, as indicated by the arrows.
- the column 2 and the upper region 3 are connected to one another by spacer bolts (or a perforated plate) 2a, so that the sound waves can emerge all around.
- the reflector body 5 has an asymmetrical conical surface, whereby a flatter cone part 5a and a steeper cone part 5b are formed.
- the cone tip 5c of the reflector body 5 is offset from the loudspeaker central axis 6 by an eccentricity measure e. This eccentricity of the cone tip 5c corresponds to approximately half the radius of the electroacoustic transducer 4.
- the flatter cone surface 5a is a central sectional plane through the cone tip 5c by about 30 ° compared to that here horizontal, circular cone base 5d inclined.
- the steeper conical surface area 5b is inclined by approximately 45 "to the cone base area 5d.
- the reflector body 5 can be rotated about an axis of rotation 7 parallel to the central axis 6 of the loudspeaker.
- This axis of rotation 7 can be identical to the loudspeaker central axis 6, as is shown in plan view in FIG. 2.
- the axis of rotation 7 can also be aligned eccentrically to the loudspeaker central axis 6, as is indicated by the reference symbol 1 ′, this rotational axis being offset by approximately half the eccentricity dimension e of the cone tip 5c with respect to the loudspeaker central axis 6.
- an adjustment motor 8 which, as shown here in dashed lines in FIG. 1, is preferably arranged within the thin-walled reflector body 5 which is hollow on the inside.
- the adjustment motor 8 is expediently designed as a stepper motor, so that certain angle settings of the preferred radiation direction A (see FIG. 3) preferred by different listeners can be programmed and set by means of input by a remote control or similar control devices.
- a further reflector body 5 * * can be provided symmetrically to the cone base surface 5d which runs horizontally here and is assigned to a midrange 4 'as a further electroacoustic transducer.
- the statements regarding the reflector body 5 apply in a corresponding manner to this reflector body 5 '.
- a woofer is arranged in the lower foot or base area of the column 2 (not shown here), which preferably also radiates the sound all around via a reflector body.
- Such an asymmetrical reflector body 5 can also be provided with respect to the woofer if required.
- FIG. 2 A plan view of the reflector body 5 is shown in FIG. 2, the asymmetrical design with an eccentric cone tip 5c in particular being evident.
- the preferred direction of radiation can be changed from A to A '(cf. also FIG. 3).
- the cone base 5d of the reflector body 5 is preferably arranged horizontally, that is to say the axis of rotation 7 arranged here in the center runs vertically. However, inclined or horizontal arrangement of the axis of rotation 7 is also possible.
- this relative movement between the reflector body 5 and the electroacoustic transducer 4 can also be achieved in that the tweeter 4 in FIG. 1 is pivoted about an upright axis of rotation formed by an eccentric disk 11.
- the rotation of the reflector body 5 is preferred since this is a passive part without electrical connections.
- the rotational movement of the electroacoustic transducer 4 about an eccentric axis of the eccentric disk 11 or a displacement movement away from the central axis 6 would also be conceivable, as indicated by the arrow a.
- FIG. 3 shows the usual arrangement of two loudspeakers 1 in an isosceles triangle to a listening position 10, for example an armchair, in a top view.
- the preferred sound emitted by the flat cone part 5a in the direction A here targets the middle listening position 10.
- the preferred sound radiation direction A can thus be varied by rotating the reflector body 5.
- the adjustment movement is preferably carried out synchronously by coupling the adjustment motors 8, ie a reflector body 5 rotates clockwise, while the other is pivoted counterclockwise by the same angle.
- this is not a precisely delimited radiation direction A, but rather a radiation or sound reinforcement area. Furthermore, it should be pointed out that sound is radiated all around in a uniform manner also at the transition surfaces between the flat cone part 5a and the steep cone part 5b. This creates the desired "soft" sound impression. Furthermore, it should be pointed out that, of course, more than two loudspeakers 1 can also be provided, for example in a square arrangement to achieve a Quadro effect, the preferred listening position 10 being in the center of the square and the respective flat cone part 5a of each of the four (or more) speaker 1 is aligned towards the center.
- FIG. 4 A preferred embodiment is shown in FIG. 4, an overhead arrangement being chosen as the arrangement of the transducer 4 to the reflector 5 compared to the embodiment according to FIG. 1.
- the transducer 4 is fastened in the column 2 and can use it as a resonance body, while the very light reflector body 5 is arranged with its tip pointing downward above it.
- the base surface 5d thus points upwards and carries an adjusting pin 9 which is mounted at the tip of a cage-like, hemispherical cover 12 (shown partly in section).
- the reflector body 5 is held "floating" above the transducer 4 and can be rotated on the adjusting pin 9 * * to set the preferred direction of radiation A due to the flatter cone part 5a about the central axis 6 which also forms the axis of rotation 7.
- cone shape should also be understood to mean a design of the reflector that differs slightly from the exact gemometric cone shape, eg. B. a concave surface line in the manner of a pagoda roof or barrel-shaped, convex surface line with a basically conical, asymmetrical basic shape of the reflector (diffuser).
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE9408805U DE9408805U1 (en) | 1994-05-30 | 1994-05-30 | Loudspeakers, in particular in the form of columns |
DE9408805U | 1994-05-30 | ||
PCT/EP1995/002035 WO1995033356A1 (en) | 1994-05-30 | 1995-05-29 | Loudspeaker, in particular in the form of a column |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0763310A1 true EP0763310A1 (en) | 1997-03-19 |
EP0763310B1 EP0763310B1 (en) | 1998-08-05 |
Family
ID=6909245
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95923208A Expired - Lifetime EP0763310B1 (en) | 1994-05-30 | 1995-05-29 | Loudspeaker, in particular in the form of a column |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0763310B1 (en) |
DE (2) | DE9408805U1 (en) |
WO (1) | WO1995033356A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE9408805U1 (en) * | 1994-05-30 | 1994-09-01 | Baur Albert | Loudspeakers, in particular in the form of columns |
RU2186470C2 (en) * | 1997-10-10 | 2002-07-27 | Самсунг Электроникс Ко., Лтд. | Omnidirectional acoustic system |
US20190052969A1 (en) * | 2017-08-11 | 2019-02-14 | Kang Gu | Adjustable-Angle Asymmetric High Frequency Acoustic Device |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3842205A (en) * | 1972-07-18 | 1974-10-15 | Nippon Musical Instruments Mfg | Tremolo effect producing acoustic filter system |
DE3447857A1 (en) * | 1984-12-31 | 1986-07-10 | Bernhard 6800 Mannheim Mayer | Rotating sound deflection system of miniature design |
DE8700649U1 (en) * | 1987-01-15 | 1987-05-27 | Steffen, Eckhard, 8501 Schwarzenbruck, De | |
US5144670A (en) * | 1987-12-09 | 1992-09-01 | Canon Kabushiki Kaisha | Sound output system |
JP2771003B2 (en) * | 1990-01-23 | 1998-07-02 | キヤノン株式会社 | Audio mirror speaker |
GB9020788D0 (en) * | 1990-09-25 | 1990-11-07 | Ellis Glynn A | Tool and saw blade tipping apparatus |
DE4219689C2 (en) * | 1991-09-24 | 1995-12-21 | Rainer Keplinger | Speaker unit |
GB2256773A (en) * | 1991-06-12 | 1992-12-16 | Canon Res Ct Europe Ltd | Loudspeaker uinit |
ATE209908T1 (en) * | 1991-06-18 | 2001-12-15 | Oklahoma Med Res Found | RADICAL CAPTURER (ßSPIN TRAPSß) FOR THE TREATMENT OF DISEASES ASSOCIATED WITH OXIDATION OF LIPIDS AND PROTEINS |
DE9205731U1 (en) * | 1992-04-29 | 1992-08-20 | Schoor, Bodo, 3404 Adelebsen, De | |
JP3358836B2 (en) * | 1992-12-25 | 2002-12-24 | 株式会社東芝 | Reflective speaker system |
DE9408805U1 (en) * | 1994-05-30 | 1994-09-01 | Baur Albert | Loudspeakers, in particular in the form of columns |
-
1994
- 1994-05-30 DE DE9408805U patent/DE9408805U1/en not_active Expired - Lifetime
-
1995
- 1995-05-29 EP EP95923208A patent/EP0763310B1/en not_active Expired - Lifetime
- 1995-05-29 DE DE59503081T patent/DE59503081D1/en not_active Expired - Fee Related
- 1995-05-29 WO PCT/EP1995/002035 patent/WO1995033356A1/en active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO9533356A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE59503081D1 (en) | 1998-09-10 |
DE9408805U1 (en) | 1994-09-01 |
EP0763310B1 (en) | 1998-08-05 |
WO1995033356A1 (en) | 1995-12-07 |
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