EP1432595B1 - Schallwandlerkopf, diesen umfassenden schallwandler und verfahren zur schallwandlung, insbesondere für ein kraftfahrzeug - Google Patents
Schallwandlerkopf, diesen umfassenden schallwandler und verfahren zur schallwandlung, insbesondere für ein kraftfahrzeug Download PDFInfo
- Publication number
- EP1432595B1 EP1432595B1 EP02777258A EP02777258A EP1432595B1 EP 1432595 B1 EP1432595 B1 EP 1432595B1 EP 02777258 A EP02777258 A EP 02777258A EP 02777258 A EP02777258 A EP 02777258A EP 1432595 B1 EP1432595 B1 EP 1432595B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pulsation
- transducer head
- sound transducer
- head according
- conversion element
- 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 - Fee Related
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Classifications
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- 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
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/18—Methods or devices for transmitting, conducting or directing sound
- G10K11/22—Methods or devices for transmitting, conducting or directing sound for conducting sound through hollow pipes, e.g. speaking tubes
-
- 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
- G10K9/02—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers driven by gas; e.g. suction operated
- G10K9/04—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers driven by gas; e.g. suction operated by compressed gases, e.g. compressed air
Definitions
- the present invention relates to a Schallwandlerkopf, with at least one inlet opening for a supply line, at least one first Pulsationsumwandlungsglied and at least a sound radiation area in a housing, and a sound transducer in one Exhaust and / or intake of an internal combustion engine, in particular of a motor vehicle, with such a sound transducer head, as well as a method for sound conversion.
- a generic transducer head as Part of a sound transmission device for a motor vehicle known.
- the sound transmission device is achieved that a targeted sound transmission from an intake an internal combustion engine of a motor vehicle to an interior of the motor vehicle is reached.
- DE 100 15 697 of the applicant describes a transducer for exhaust gas pulsations.
- This sound transducer is the exhaust system of an internal combustion engine, in particular a motor vehicle, assigned and comprises a generic transducer head, over which, based on the exhaust gas pulsations, airborne sound at least in the space of the internal combustion engine is radiant.
- This transducer head can have different geometries and includes a membrane.
- a corresponding condenser microphone comprises a first membrane, which on a counter electrode is coupled to sense vibrations of the first membrane, and above the first membrane a second membrane, through which an effective protection against the ingress of sweat into the microphone is to be achieved.
- this condenser microphone is that the distance between the two membranes must be kept very small in order to have a sufficient transfer effect of the second to achieve the first membrane.
- Object of the present invention is therefore, the generic transducer head such that the disadvantages of the prior art are overcome, especially in the largest possible pressure ranges optimized sound emission allows becomes.
- a substantially airtight Partition by means of which the housing is divided into at least two sections, wherein a first section with the inlet opening and the second section with the Schallabstrahlungs Scheme is operatively connected, the first Pulsationsumwandlungsglied in the first section is arranged and divided into a first chamber and a second chamber, a pressure compensation device between the first chamber and the second chamber, a second pulsation conversion element, at least partially in the second section at least is arranged partially movable, and a transmission device between the first and second sections for transmitting vibrations of the first pulsation conversion element is present on the second Pulsationsumwandlungsglied.
- the first Pulsationsumwandlungsglied at least a first Membrane included.
- the first Pulsationsumwandlungsglied at least an at least partially movably mounted in the first section, preferably pot-shaped, piston and / or at least partially movable in the first section mounted disc, wherein the first portion is preferably at least substantially is cylindrical in the region of the piston and / or the disc and / or the first portion at least partially a smaller cross-sectional area than the second Section has.
- the pressure compensation device at least a connection opening in the first pulsation conversion member, in one with the first Pulsation conversion element and the transmission device in operative connection Link and / or between the first Pulsationsumwandlungsglied and the housing and / or in a bypass.
- the pressure compensation device at least one, preferably in its damping properties adjustable, damping element, in particular in the form of a variable area reduction, a labyrinth and / or a porous material, such as foam, iron wool and / or the like.
- the invention provides that the geometric dimensions of the first section, in particular the first chamber and / or the second chamber, the inlet opening, the Supply line and / or the second section, in particular the sound radiation area, preferably during operation of the Schallwandlerkopfs, is variable or are.
- the invention is also characterized in that the second Pulsationsumwandlungsglied at least one second membrane and / or one connected to a flexible cutting disc Schallabstrahlungsscale, which each have the second section in a third chamber and subdivide or subdivide a fourth chamber, and / or at least one structure-borne sound generator, in particular comprising a plunger, for the mechanical excitation of at least partially In the body arranged Schallabstrahlungs Championship, in particular comprises of the Housing, includes.
- the housing is constructed in several parts, wherein the individual housing parts preferably different materials, such as plastic and / or metal, preferably aluminum include.
- first membrane between a first housing part and a second housing part is fastened or the housing in the region of the partition of a first housing part and in the region of the piston and / or the disc by a second Housing part is formed.
- the second membrane and / or the cutting disc preferably between a third housing part and a fourth housing part can be fastened, wherein preferably the first and the fourth housing part are formed in one.
- the invention is for example characterized in that the transmission device at least one, in particular rigid coupling element, mechanical coupling element, electromechanical Coupling element, electromagnetic coupling element and / or magnetomechanical Coupling element and / or at least one positioning device, wherein the Coupling element is detachably attachable.
- At least one sealing device preferably in the form a Simerrings, for storage and implementation of the coupling element.
- the coupling element at least one, preferably electromagnetic, scanning device for Scanning the vibrations of the first Pulsationsumwandlungsglieds and / or one, preferably electromagnetic, drive means for driving the second Pulsationsumwandlungsglieds includes.
- the scanning device and / or the drive device stationary is arranged relative to the housing and / or the partition wall or are.
- the scanning device at least one, preferably can be moved relative to the housing, pulsation body and / or the drive device comprises at least one, preferably movable relative to the housing, drive body, wherein preferably the pulsation body and the drive body via at least one connecting device if necessary, can be coupled with each other safe to take.
- the housing at least in the area the pulsation body and / or the drive body permanent magnetization and the pulsation body and / or the drive body at least a first coil include or include, or at least in the region of Pulsations emotionss and / or the drive body arranged at least one relatively stationary relative to the housing second coil and the Pulsation body and / or the drive body at least partially a permanent magnetization have or have.
- the connecting device a rigidly connected to the Pulsations emotions or the drive body or comprising this comprises coupling rod, wherein the drive body or the Pulsationspian in the operation of the transducer head either substantially free relative to the Coupling rod movably mounted or safe to take with the coupling rod is connected.
- This embodiment may advantageously be characterized in that the coupling rod at least in the area of the drive body or the Pulsations Congresss a permanent Magnetization and the drive body or the Pulsations manipulate in the area the coupling rod comprises or comprise at least a third coil, or the coupling rod at least in the region of the drive body or the Pulsations emotionss at least a fourth Coil comprises and the drive body or the Pulsations endeavor in the region of the coupling rod has or have a permanent magnetization.
- the coupling rod at least in the region of the drive body or the Pulsations emotionss and / or the drive body or the Pulsationsharm in the region of the coupling rod a Device for increasing the static friction resistance between the coupling rod on the one hand and the drive body or the pulsation body on the other hand, preferably in shape at least one controllable and / or controllable claw device and / or, at least one with the coupling rod, the drive body and / or the Pulsations Congress connected element, electrically, pneumatically and / or hydraulically against the surface of the drive body, the Pulsations emotionss or the coupling rod is pressed, comprises.
- the positioning device at least one elastic element, preferably in the form of a spring element, in the first chamber, second chamber, third chamber and / or fourth chamber, in particular between the pulsation body on the one hand and the partition wall of the first pulsation conversion element, on the other hand, and / or the partition on the one hand and the drive body on the other hand, anordbar and / or during an operation of the Schallwandlerkopfs controllably and / or controllably includes.
- the positioning device at least one elastic element, preferably in the form of a spring element, in the first chamber, second chamber, third chamber and / or fourth chamber, in particular between the pulsation body on the one hand and the partition wall of the first pulsation conversion element, on the other hand, and / or the partition on the one hand and the drive body on the other hand, anordbar and / or during an operation of the Schallwandlerkopfs controllably and / or controllably includes.
- the present invention is advantageously characterized by a control and / or Control device for controlling and / or regulating the Schallabstrahl characterizingen, in particular in operative connection with the partition wall, the first pulsation conversion member, the Attenuation element, the second Pulsationsumwandlungsglied, a signal generator for at least another external signal influencing the sound radiation characteristic and / or the transmission device.
- control and / or regulating device with the first Coil or second coil in particular for detecting a movement of the Pulsations emotionss Realtiv to the housing and / or to bring about a movement of the drive body relative to the housing, the third coil or the fourth coil and / or the device for increasing the frictional resistance, in particular for on-demand secure removal Coupling of Pulsations emotionss and the drive body, is in operative connection.
- control and / or regulating device with at least an active member, preferably a radio, engine mount, damper and / or shaker on a bulkhead, in particular for the transmission of movement information of Pulsations stressess to the active member, is in operative connection.
- active member preferably a radio, engine mount, damper and / or shaker on a bulkhead
- first diaphragm, the piston, the Disc, the second diaphragm, the cutting disc and / or the Schallabstrahlungsscale a Elastomer, a reinforcing fabric, a plastic, a metal sheet and / or a metal, preferably Aluminum, comprising or comprising.
- first membrane, the second membrane and / or the Cutting disc at least partially different strengths, different flexibilities and / or having different shapes, preferably for providing a stiffer middle region and a more flexible edge region and / or multiple parts is executed or are.
- the bias of the first membrane, the second Membrane and / or the cutting disc and / or the size of at least one oscillatory Area of the first membrane, the second membrane, and / or the cutting disc, in particular during operation of the transducer head, controllable and / or controllable are.
- the invention further provides a sound transducer in an exhaust and / or suction area an internal combustion engine, in particular a motor vehicle, with an inventive Sound transducer head proposed.
- a method for sound conversion, in particular in a Motor vehicle, using a Schallwandlerkopfs invention and / or Sound transducer wherein the method is characterized by stimulating, in particular by means of intake and / or exhaust gas pulsations of an internal combustion engine of a motor vehicle, one arranged in a first section of the Schallwandlerkopfs and means a pressure compensation device pressure-relieved first Pulsationsumwandlungsglieds, and Generating a movement of a second pulsation conversion element, by transmission a movement of the first Pulsationsumwandlungsglieds by means of a transmission device to the second Pulsationsumwandlungsglied.
- the substantially rigid connection between the first Pulsationsumwandlungsglied and the second Pulsationsumwandlungsglied made or this compound is released, preferably as a function of the frequency of the Transducer head supplied pulsations.
- the movement of the first Pulsationsumwandlungsglieds is scanned by means of a scanning device, preferably electromagnetically, from the scanning device, a movement signal is generated, the movement signal by means of a Control and / or regulating device, preferably electronically, processed, in particular reinforced, is and the second Pulsationsumwandlungsglied in response to the motion signal is moved by means of a drive device.
- a particularly preferred embodiment of the method is characterized in that that the movement signal is supplied to at least one active member, and / or the motion signal at least one additional signal at least temporarily to the drive of the second Pulsationsumwandlungsglieds is superimposed.
- the invention is thus based on the surprising finding that a transducer head can be carried out so that on the one hand pulsations, in particular exhaust pulsations a Internal combustion engine of a motor vehicle in vibrations in a substantially closed Space, such as the engine compartment of the motor vehicle, can be converted and on the other hand, a functionality even at, for example, static pressures of 0.5 is guaranteed to 1 bar, by a first Pulsationsumwandlungsglied so to speak as an excitation member with a second pulsation conversion element either in the form of a sound radiation membrane or a structure-borne noise can be coupled under pressure equalization.
- each desired sound radiation is achieved. It can, for example, in the Supply of intake or exhaust pulsations of an internal combustion engine to the transducer head depending on the excitation frequency either a rigid connection between the excitation member on the one hand and the Schallabstrahlungsmembran a Schallabstrahlungsscale or a structure-borne noise on the other hand be induced or at high Excitation frequencies at which the pulsations have a lower amplitude, this Connection to be solved.
- a movement via a scanning device the excitation member detected and via a drive means the Schallabstrahlungsmembran or the structure-borne noise that is independent of the excitation element can move, depending on the detected movement of the excitation member and / or be moved further signals to produce a certain sound radiation.
- FIG. 1 shows a first inventive transducer head 1 is shown with a housing 3, which has an inlet opening 5, which with a feed line, not shown for supplying pulsations, in particular intake and / or exhaust gas pulsations of a Internal combustion engine of a motor vehicle, is connected.
- a Dividing wall 7 is arranged, which the interior of the transducer head 1 in one of the inlet opening 5 facing first portion and a sound emission area 9 facing divided into the second section.
- the housing 3 in the sound radiation area 9 in the form of a Horns 11 designed.
- the transducer head 1 has a connecting tube 19, which this Chambers 15 and 17 interconnects so that always a static pressure equalization between the same takes place.
- the connecting pipe 19 also includes a damping element 21, for example in the form of an adjustable cross-sectional constriction of the connecting pipe 19, which ensures that high-frequency pressure fluctuations due to from above the inlet opening 5 the transducer head 1 fed pulsations not be transmitted via the connecting pipe 19.
- the excitation membrane 13 is in her central area via a connecting member, namely in the form of a center plate 23, with a rigid coupling rod 25 in operative connection.
- This coupling rod 25 is via a sealing device in the form of a Simerrings 27 guided by the partition 7 frictionless to a ensure airtight separation of the first section from the second section.
- Of the second section is also through a sound radiation membrane 31 in a third and fourth Division 29 and 33 divided.
- the sound radiation membrane 31 has, like the excitation membrane 13, a center plate 35 which is connected to the coupling rod 25.
- the two Membranes 13 and 31 are positioning devices in the form of spring elements 37th and 39 are kept in a predetermined zero position.
- the inlet port 5 For sound radiation through the transducer head 1 are first on the inlet port 5 pulsations in the first chamber 15 introduced.
- the introduced into the first chamber 15 Pulsations force a deflection of the excitation membrane 13 from its zero position and a vibration of the same.
- the pulsations superimposed low-frequency pressure fluctuations, in particular static pressure differences are, via the connecting pipe 19 between the first and second chambers 15 and 17 balanced. This will be a tension prevents the excitation membrane 13.
- the damping element 21 is further achieved that high-frequency pressure changes not directly from the first chamber 15 at the second chamber 17 are forwarded.
- the vibrations of the excitation membrane 13 are transmitted via the center plate 23 to the coupling rod 25, whereby the Schallabstrahlungsmembran 31 is vibrated and thus the desired sound radiation he follows.
- the transducer head 1 it is achieved by the transducer head 1 according to the invention that an unhindered Sound emission is independent of low-frequency pressure fluctuations. Further may be a connection of the inlet opening 5 with the surrounding atmosphere, as to Emission of exhaust pulsations is undesirable, be avoided.
- the Schallabstrahl characterizingen the transducer head 1 can in various ways be adapted to the sound transducer head 1 supplied pulsations. So, for example the desired radiation characteristic via the shape of the sound emission area 9 be varied. Further, the vibration of the diaphragm 13 and 31 in particular via a setting of the damping element 21, the spring elements 37 and / or 39 and the bias the membranes 13 and / or 31 are varied. A setting of the volume in particular in the first chamber 15 and the supply line, not shown, can under Formation of a Helmholtz resonator take place.
- FIG. 2 shows a second embodiment of the transducer head 1 'according to the invention. shown.
- Identical elements of the sound transducer head 1 'of Figure 2 in comparison to Transducer head 1 of Figure 1 have the same reference numerals.
- Sound transducer head 1 of Figure 1 comprises the transducer head 1 'of Figure 2 an excitation membrane 13 'and a Schallabstrahlungsmembran 31', the areas of different Have flexibility.
- the excitation membrane 13 ' has an edge region 13'a, which has a higher flexibility compared to the central area 13'b.
- the Schallabstrahlungsmembran 31 'on an edge region 31'a, which a greater flexibility as having its central region 31'b.
- This embodiment of the diaphragm 13 'and 31' allows it, the sound radiation characteristics of the Schallwandlerkopfs 1 ', in addition to Change in the bias of the diaphragm 13 'and 31', by changing the size of the Set areas of different flexibility and / or the flexibility difference.
- a transducer head according to the invention need not comprise a double membrane system, but instead of an acoustically active Schallabstrahlungsmembran a structure-borne noise exhibit.
- Such an embodiment of the transducer head according to the invention 1 " is shown in Figure 3. Same elements of the sound transducer head 1" of Figure 3 in comparison to the transducer heads 1 and 1 'of Figures 1 and 2 carry the same reference numerals.
- the coupling rod 25 'on the one hand connected to the center plate 23 of the excitation membrane 13 ', on the other hand is located on upper end of the coupling rod 25 'a plunger 41.
- the transducer head 1 "is beyond connected via connecting elements 43 with a body 45, so that via the inlet opening 5 supplied pulsations to vibrations of the excitation membrane 13 'and finally to Impacts of the plunger 41 lead to the body 45, whereby the body 45 for radiation is excited by sound waves.
- the connecting elements 43 is an additional chamber 47 between the body 45 and the partition 7th as a resonator, so that the design of this chamber 47, the characteristics of can be changed by the body 45 generated sound.
- FIG. 4 shows a fourth embodiment of a transducer head 1 "'according to the invention. represented, wherein has been resorted to the already known reference numerals.
- a transmission of the vibrations of the excitation membrane 13 "electromechanically performed on the sound radiation membrane 31.
- Dazu is the center plate 23 of the excitation membrane 13 "via a rod 49 with a magnetomechanical Scanning device 51, which, for example, a piezoelectric element includes, connected.
- the signals picked up by the scanner 51 become forwarded via a line 53 to a control device 55.
- This control device 55 is connected via a line 57 to a drive device 59.
- the drive device 59 is connected via a rod 61 with the center plate 35 of the sound radiation membrane 31.
- the openings 63 are in the form of a damping element, not shown filled with foam. By this foam is achieved that only low-frequency Pressure fluctuations are transmitted through the openings 63, but not high-frequency Fluctuations.
- FIG. 5 shows a fifth embodiment of a sound transducer head 1 "" according to the invention. represented with the already known reference numerals for already mentioned elements.
- the Sound transducer head 1 "" comprises a housing 3 ', which via a partition wall 7' in one of an inlet opening 5 'facing first portion and a sound radiation area 9' facing the second section is divided.
- the Schallabstrahlungs Scheme 9 ' has, as also in the other embodiments according to the invention, the shape of a horn 11 'on.
- an excitation membrane 13 "' is arranged, which has at least one opening 63 'for pressure equalization between the first and second chambers 15' and 17 '.
- the Excitation membrane 13 '" is in the second chamber 17' via a first spring element 67 with a pulsation body 69 connected. Furthermore, between the Pulsations Congress 69 and the Partition wall 7 'in the first section, a second spring element 71 is arranged. The two spring elements 67 and 71 are used in particular to the interposed pulsation body 69 to hold at a stationary excitation membrane 13 "'in a previously defined zero position.
- the Pulsations Congress 69 is fixedly connected to a coupling rod 73 which passes through the partition wall 7 'is guided. For sealing serves a in the partition 7 'arranged Simmerring 27 '.
- the pulsation body 69 opposite end of the coupling rod 73 is in mounted in a third chamber 29 'arranged in the second section drive body 75.
- the drive body 75 is in turn rigid with a sound radiation membrane 31 ", which is arranged in a fourth chamber 33 'in the second section connected.
- the transducer head 1 "" allows a particularly flexible sound radiation, in particular also as a function of the frequency of a sound transducer head 1 "" via the inlet port 5 'supplied pulsation.
- the transducer head 1 "" for conversion intake or exhaust gas pulsations of an internal combustion engine is the problem that at high pulsation frequencies, as at high engine revolutions, in particular from 4,000 revolutions per minute, the pulsation amplitudes are insufficient are large, sufficient sound radiation by means of the sound radiation membrane 31 "at rigid connection of the same with the excitation membrane 13 '" to achieve.
- the Operation of the sound transducer head 1 "" is therefore in particular between different excitation frequencies to distinguish.
- a sound radiation is achieved in that the excitation membrane 13 '"on the Pulsations Congress 69 and by means of the coupling rod 73 rigid connected to the Pulsations Congress 69 drive body 75 with the Schallabstrahlungsmembran 31 "is mechanically connected to connect the coupling rod 73 with the Drive body 75, a connecting device 77 is provided in the drive body 75.
- Connecting device 77 comprises a coil 79 in the drive body 75, and in the area of the drive body 75, the coupling rod 73 has a permanent magnetization.
- the coil 79 is connected via a line 81 to a control device 83.
- the pulsation body 69 is substantially mechanically separated from the drive body 75, If a movement of the excitation membrane 13 "'leads to a movement of the pulsation body 69, but the drive body 75 and thus the Schallabstrahlungsmembran 31 "remain basically at rest.
- the pulsation body 69 also includes a coil 85, and the housing 3 'has in the region of the second chamber 17' a permanent magnetization on.
- a movement of the Pulsations stressess 69 therefore leads to the induction of a current in the coil 85, which is supplied by means of a line 87 of the control device 83.
- This Induction current represents a motion signal of the excitation membrane 13 '", in the control device 83 is evaluated or processed.
- the control device 83 determines the excitation frequency of the excitation membrane 13 "' or processed motion signal can from the control device 83 via a line 89th in particular for controlling a further active member, not shown, as in one Radio, engine mounts, dampers or shakers on a bulkhead within the motor vehicle, be transmitted.
- the movement signal in the control device 83 can be amplified and via a line 91 of another coil 93, which is arranged in the drive body 75, be supplied.
- the housing 3 ' also has a in the region of the third chamber 29' permanent magnetization, so that the arrangement of drive body 75, radiation membrane 31 "and housing 3 'represents a loudspeaker arrangement
- Line 91 of the coil 93 supplied signal can drive the body 75 in motion offset and thus the Schallabstrahlungsmembran 31 "were excited, creating a desired Sound radiation is generated.
- FIG 6 a sixth embodiment of a transducer head according to the invention 1 "" 'shown in a perspective sectional view.
- the transducer head 1 "" ' comprises a housing 3 ", which consists essentially of three housing parts 3" a, 3 "b and 3" c.
- the first and second housing parts 3 "a and 3" b are in this case via first connecting devices 4b and the first and third housing parts 3 "a and 3" c via second connecting devices 4a, each in the form of screw, connected together.
- the transducer head 1 "" 'supplied can be.
- the first housing part 3 "a is formed such that a partition wall 7" provided is, the housing 3 "in one of the inlet opening 5" facing the first section and a second section facing a sound emission area 9 ".
- the inlet opening 5 "facing first portion of the housing 3" is a first Pulsation conversion member arranged.
- a transducer head according to the invention comprises the first Pulsationsumwandlungsglied of the transducer head 1 "" 'no excitation membrane, but a Disc 100.
- the disc 100 has a center plate 102 and is in the region of the center plate 102 connected to a coupling rod 104.
- the second housing part 3 "b has in the area the disc 100 has a complementary to the disc 100 cross-sectional shape, so that the Disk 100 substantially freely movable within the second housing part 3 "along b the longitudinal axis of the coupling rod 104 is movable.
- the disc 100 divides the inlet opening 5 "facing first portion of the housing 3" in two chambers 15 ", 17", a first chamber 15 “and a second chamber 17".
- the gap causes high frequency Pressure fluctuations lead to a movement of the disc 100, while superimposed, low-frequency pressure fluctuations, in particular static pressure differences over the Gap between the chambers 15 ", 17” are compensated.
- the movements of the disc 100 are transmitted via the coupling rod 104 to a rigid sound radiation disc 106.
- Die Trennin 107 has a funnel-shaped central portion 107b, which is connected to the Schallabstrahlungscopy 106 is connected or formed integrally therewith. Furthermore, the cutting disk 107 on a curved edge portion 107a.
- the cutting disc 107 also fulfills the function of a tight seal between the third and fourth chambers 29 ", 33", causing an acoustic short between them Chambers 29 ", 33” prevented. Furthermore, the cutting disk 107 allows due to their flexibility and the shape of the edge portion 107a a free mobility of the sound radiation disc 106, without forming stresses within the blade 107. So When there is a movement of the sound emitting disk 106, sound is emitted from the transducer head 1 "" 'in the Schallabstrahlungs Scheme 9 ".
- 1 'shown in Figures 1 and 2 is in the third chamber 29 "no spring element arranged to the sound radiation disc 106 in to keep a predetermined zero position.
- This function is fulfilled by a spring element 108, which is arranged in the second chamber 17 “and which extends over a spring seat 110, the connected by means of connecting devices 112 with the partition wall 7 ", on the partition wall 7 "on the partition wall 7" opposite side of the spring element 108th the same is connected to the disc 100. Due to the tensile or compressive force of the spring element 108, the disc 100 and thus the over the coupling rod 104 with the Disc 100 associated sound radiation disc 106 after a deflection in a predetermined N ul position returned.
- the transducer head 1 "" 'shown in FIG. 6 also has further advantages on. Due to the subdivision of the housing 3 "in the three housing parts 3" a, 3 “b, 3” c he is modular. Different embodiments of the housing parts 3 "a, 3" b, 3 “c are provided, which in an assembly of the transducer head 1 "" 'specifically with each other be combined. Thus, various third housing parts 3 "c may be provided to adjust certain sound radiation characteristics by shaping them. Also, different sound emitting disks 106 and cutting disks 107 may be provided be without the geometry of the first and third housing part 3 "a and 3" c must be adapted.
- the sound radiation characteristic can be changed thereby be that the dimensions of the second housing part 3 "b depending on the Dimensions of the disc 100 and / or from the coupling rod 104 are adapted to each other can.
- the transducer head 1 "" 'to various internal combustion engines adjust that by extending the second housing part 3 "b a longer stroke the disc 100 is made possible or by enlarging the cross section of the second Housing part 3 "b a larger volume of the first chamber 15" is provided, so that at constant pulsations a smaller movement of the disc 100 and thus the Schallabstrahlungsscale 106 takes place, which is desirable in particular for high-frequency pulsations is.
- the shape of the disc 100 can be adapted to the circumstances.
- a sound transducer head which has a sound transducer head unimpeded sound emission at different static pressures possible and in varied manner can be matched to a desired radiation characteristic.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Exhaust Silencers (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Description
- Figur 1
- eine Schnittansicht einer ersten Ausführungsform des erfindungsgemäßen Schallwandlerkopfs;
- Figur 2
- eine Schnittansicht einer zweiten Ausführungsform des erfindungsgemäßen Schallwandlerkopfs;
- Figur 3
- eine Schnittansicht einer dritten Ausführungsform des erfindungsgemäßen Schallwandlerkopfs;
- Figur 4
- eine Schnittansicht einer vierten Ausführungsform des erfindungsgemäßen Schallwandlerkopfs
- Figur 5
- eine Schnittansicht einer fünften Ausführungsform des erfindungsgemäßen Schallwandlerkopfs; und
- Figur 6
- eine perspektivische Schnittansicht einer sechsten Ausführungsform des erfindungsgemäßen Schallwandlerkopfs.
- 1, 1', 1", 1"', 1"", 1""'
- Schallwandlerkopf
- 3, 3', 3"
- Gehäuse
- 3"a, 3 "b, 3 "c
- Gehäuseteil
- 4a, 4b
- Verbindungsvorrichtung
- 5, 5', 5"
- Einlaßöffnung
- 7, 7', 7"
- Trennwand
- 9, 9', 9"
- Schallabstrahlungsbereich
- 11,11'
- Horn
- 13, 13', 13", 13"'
- Anregungsmembran
- 13'a
- Randbereich
- 13'b
- Mittelbereich
- 15, 15', 15"
- Kammer
- 17, 17', 17"
- Kammer
- 19
- Verbindungsrohr
- 21
- Dämpfungselement
- 23
- Mittelteller
- 25, 25'
- Koppelstange
- 27, 27', 27"
- Simerring
- 29, 29', 29"
- Kammer
- 31, 31', 31"
- Schallabtrahlungsmembran
- 31'a
- Randbereich
- 31'b
- Mittelbereich
- 33, 33', 33"
- Kammer
- 35
- Mittelteller
- 37
- Federelement
- 39
- Federelement
- 41
- Stößel
- 43
- Verbindungselemente
- 45
- Körper
- 47
- Kammer
- 49
- Stange
- 51
- Abtasteinrichtung
- 53
- Leitung
- 55
- Regeleinrichtung
- 57
- Leitung
- 59
- Antriebseinrichtung
- 61
- Stange
- 63, 63'
- Öffnung
- 65
- Leitung
- 67
- Federelement
- 69
- Pulsationskörper
- 71
- Federelement
- 73
- Koppelstange
- 75
- Antriebskörper
- 77
- Verbindungseinrichtung
- 79
- Spule
- 81
- Leitung
- 83
- Regeleinrichtung
- 85
- Spule
- 87
- Leitung
- 89
- Leitung
- 91
- Leitung
- 93
- Spule
- 95
- Leitung
- 100
- Scheibe
- 102
- Mittelteller
- 104
- Koppelstange
- 106
- Schallabstrahlungsscheibe
- 107
- Trennscheibe
- 107a
- Randbereich
- 107b
- Mittelbereich
- 108
- Federelement
- 110
- Federsitz
- 112
- Verbindungvorrichtung
Claims (34)
- Schallwandlerkopf (1, 1', 1" 1"', 1"", 1""'), mit mindestens einer Einlaßöffnung (5, 5', 5") für eine Zufuhrleitung, mindestens einem ersten Pulsationsumwandlungsglied (13, 13', 13", 13"', 100) und mindestens einem Schallabstrahlungsbereich (9, 9', 9") in einem Gehäuse (3, 3', 3"), gekennzeichnet durch
eine im wesentlichen luftdichte Trennwand (7, 7', 7"), mittels der das Gehäuse (3, 3', 3") in zumindest zwei Abschnitte (3"a, 3"b, 3"c) unterteilt ist, wobei ein erster Abschnitt (3"c) mit der Einlaßöffnung (5, 5', 5") und der zweite Abschnitt (3"a, 3"b) mit dem Schallabstrahlungsbereich (9, 9', 9") in Wirkverbindung steht, das erste Pulsationsumwandlungsglied (13, 13', 13",13"', 100) in dem ersten Abschnitt (3"c) angeordnet ist und denselben in eine erste Kammer (15, 15', 15") und eine zweite Kammer (17, 17', 17") unterteilt,
eine Druckausgleichseinrichtung (19, 21, 63, 63', 105) zwischen der ersten Kammer (15, 15', 15") und der zweiten Kammer (17, 17', 17"),
ein zweites Pulsationsumwandlungsglied (31, 31', 31", 41, 106), das zumindest teilweise in dem zweiten Abschnitt (3"a, 3'b) zumindest bereichsweise bewegbar angeordnet ist, und
eine Übertragungseinrichtung (25, 25', 49, 51, 59, 61, 69, 73, 75, 77, 79, 85, 93, 104) zwischen dem ersten und zweiten Abschnitt (3"a, 3"b, 3"c) zur Übertragung von Schwingungen des ersten Pulsationsumwandlungsglieds (13, 13', 13", 100) auf das zweite Pulsationsumwandlungsglied (31, 31', 31", 41, 106). - Schallwandlerkopf nach Anspruch 1, dadurch gekennzeichnet, daß
das erste Pulsationsumwandlungsglied zumindest eine erste Membran (13, 13', 13", 13"') umfaßt. - Schallwandlerkopf nach Anspruch 1, dadurch gekennzeichnet, daß
das erste Pulsationsumwandlungsglied zumindest einen zumindest bereichsweise in dem ersten Abschnitt (3"c) bewegbar gelagerten, vorzugsweise topfförmigen, Kolben und/oder eine zumindest bereichsweise in dem ersten Abschnitt (3"c) bewegbar gelagerte Scheibe (100) umfaßt, wobei der erste Abschnitt (3"c) vorzugsweise im wesentlichen zumindest im Bereich des Kolbens und/oder der Scheibe (100) zylinderförmig ausgebildet ist und/oder der erste Abschnitt (3"c) zumindest bereichsweise eine kleinere Querschnittsfläche als der zweite Abschnitt (3"a, 3"b) aufweist. - Schallwandlerkopf nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß
die Druckausgleichseinrichtung zumindest eine Verbindungsöffnung (63, 63') in dem ersten Pulsationsumwandlungsglied (13", 13'"), in einem mit dem ersten Pulsationsumwandlungsglied (13, 13', 13", 100) und der Übertragungseinrichtung (25, 25', 49,51, 104) in Wirkverbindung stehenden Verbindungsglied (23, 102) und/oder zwischen dem ersten Pulsationsumwandlungsglied (13, 13', 13", 13"', 100) und dem Gehäuse (3, 3', 3") und/oder in einem Bypass (19, 21) umfaßt. - Schallwandlerkopf nach Anspruch 4, dadurch gekennzeichnet, daß
die Druckausgleichseinrichtung zumindest ein, vorzugsweise in seinen Dämpfungseigenschaften einstellbares, Dämpfungselement (21), insbesondere in Form einer variablen Querschnittsverringerung, eines Labyrinths und/oder eines porösen Materials, wie Schaumstoff, Eisenwolle und/oder dergleichen, umfaßt. - Schallwandlerkopf nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß
die geometrischen Abmessungen des ersten Abschnitts, insbesondere der ersten Kammer (15,15', 15") und/oder zweiten Kammer (17, 17', 17"), der Einlaßöffnung (5, 5', 5"), der Zufuhrleitung und/oder des zweiten Abschnitts (3"a, 3"b), insbesondere des Schallabstrahlungsbereichs (9, 9', 9"), vorzugsweise während eines Betriebs des Schallwandlerkopfs (1, 1', 1", 1"', 1"", 1""'), veränderbar ist bzw. sind. - Schallwandlerkopf nach Anspruch 6, dadurch gekennzeichnet, daß
der Schallabstrahlungsbereich (9, 9') im wesentlichen hornförmig (11, 11') ist. - Schallwandlerkopf nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß
das zweite Pulsationsumwandlungsglied zumindest eine zweite Membran (31, 31', 31") und/oder eine mit einer flexiblen Trennscheibe (107) verbundene Schallabstrahlungsscheibe (106), welche jeweils den zweiten Abschnitt in eine dritte Kammer (29, 29', 29") und eine vierte Kammer (33, 33', 33") unterteilt bzw. unterteilen, und/oder zumindest einen Körperschallerzeuger, insbesondere umfassend einen Stößel (41), zur mechanischen Anregung eines zumindest teilweise im Schallabstrahlungsbereich (9) angeordneten Körpers (45), insbesondere umfaßt von dem Gehäuse (3), umfaßt. - Schallwandlerkopf nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß
das Gehäuse (3") mehrteilig aufgebaut ist, wobei die einzelnen Gehäuseteile (3"a, 3"b, 3"c) vorzugsweise unterschiedliche Materialien, wie Kunststoff und/oder Metall, vorzugsweise Aluminium, umfassen. - Schallwandlerkopf nach Anspruch 9, dadurch gekennzeichnet, daß
die erste Membran zwischen einem ersten Gehäuseteil (3"a) und einem zweiten Gehäuseteil (3"b) befestigbar ist oder das Gehäuse (3") im Bereich der Trennwand (7") von einem ersten Gehäuseteil (3"a) und im Bereich des Kolbens und/oder der Scheibe (100) durch ein zweites Gehäuseteil (3"b) ausgebildet ist. - Schallwandlerkopf nach Anspruch 9 oder 10, dadurch gekennzeichnet, daß
die zweite Membran und/oder die Trennscheibe (107) vorzugsweise zwischen einem dritten Gehäuseteil (3"c) und einem vierten Gehäuseteil (3"a) befestigbar ist, wobei vorzugsweise das erste und das vierte Gehäuseteil (3"a) in einem ausgeformt sind. - Schallwandlerkopf nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß
die Übertragungseinrichtung zumindest ein, insbesondere starres Koppelelement (25, 25', 104), mechanisches Koppelelement, elektromechanisches Koppelelement (49, 51, 59, 61), elektromagnetisches Koppelelement (69, 73, 75, 77, 79, 85, 93) und/oder magnetomechanisches Koppelelement und/oder zumindest eine Positioniereinrichtung (37, 39, 67, 71, 108) umfaßt, wobei das Koppelelement (25, 25', 104) lösbar anbringbar ist. - Schallwandlerkopf nach Anspruch 12, gekennzeichnet durch
zumindest eine Dichtungseinrichtung, vorzugsweise in Form eines Simerrings (27, 27', 27"), zur Lagerung und Durchführung des Koppelelements (25, 25', 73, 104). - Schallwandlerkopf nach Anspruch 12 oder 13, dadurch gekennzeichnet, daß
das Koppelelement zumindest eine, vorzugsweise elektromagnetische, Abtasteinrichtung (51, 69, 85) zur Abtastung der Schwingungen des ersten Pulsationsumwandlungsglieds (13", 13"') und/oder eine, vorzugsweise elektromagnetische, Antriebseinrichtung (59, 75, 93) zum Antrieb des zweiten Pulsationsumwandlungsglieds (31, 31") umfaßt. - Schallwandlerkopf nach Anspruch 14, dadurch gekennzeichnet, daß
die Abtasteinrichtung (51) und/oder die Antriebseinrichtung (59) ortsfest relativ zum Gehäuse (3) und/oder der Trennwand (7) angeordnet ist bzw. sind. - Schallwandlerkopf nach Anspruch 14, dadurch gekennzeichnet, daß
die Abtasteinrichtung zumindest einen, vorzugsweise relativ zum Gehäuse bewegbaren, Pulsationskörper (69) und/oder die Antriebseinrichtung zumindest einen, vorzugsweise relativ zum Gehäuse bewegbaren, Antriebskörper (75) umfaßt, wobei vorzugsweise der Pulsationskörper (69) und der Antriebskörper (75) über zumindest eine Verbindungseinrichtung (77) bedarfsweise miteinander mitnahmesicher koppelbar sind. - Schallwandlerkopf nach Anspruch 16, dadurch gekennzeichnet, daß
das Gehäuse (3') zumindest im Bereich des Pulsationskörpers (69) und/oder des Antriebskörpers (75) eine permanente Magnetisierung aufweist und der Pulsationskörper (69) und/oder der Antriebskörper (75) zumindest eine erste Spule (85, 93) umfaßt bzw. umfassen, oder
zumindest im Bereich des Pulsationskörpers (69) und/oder des Antriebskörpers (75) zumindest eine relativ zum Gehäuse (3') ortsfeste zweite Spule angeordnet und der Pulsationskörper (69) und/oder der Antriebskörper (75) zumindest bereichsweise eine permanente Magnetisierung aufweist bzw. aufweisen. - Schallwandlerkopf nach Anspruch 16 oder 17, dadurch gekennzeichnet, daß
die Verbindungseinrichtung (77) eine starr mit dem Pulsationskörper (69) oder dem Antriebskörper (75) verbundene oder von diesem umfaßte Koppelstange (73) aufweist, wobei der Antriebskörper (75) oder der Pulsationskörper (69) im Betrieb des Schallwandlerkopfs (1"") entweder im wesentlichen frei relativ zu der Koppelstange (73) bewegbar gelagert oder mitnahmesicher mit der Koppelstange (73) verbunden ist. - Schallwandlerkopf nach Anspruch 18, dadurch gekennzeichnet, daß
die mitnahmesichere Verbindung zwischen der Koppelstange (73) einerseits und dem Antriebskörper (75) oder dem Pulsationskörper (69) andererseits elektromagnetisch und/oder mechanisch erfolgt. - Schallwandlerkopf nach Anspruch 19, dadurch gekennzeichnet, daß
die Koppelstange (73) zumindest im Bereich des Antriebskörpers (75) oder des Pulsationskörpers (69) eine permanente Magnetisierung aufweist und der Antriebskörper (75) oder der Pulsationskörper (69) im Bereich der Koppelstange (73) zumindest eine dritte Spule (79) umfaßt bzw. umfassen, oder
die Koppelstange (73) zumindest im Bereich des Antriebskörpers (75) oder des Pulsationskörpers (69) zumindest eine vierte Spule umfaßt und der Antriebskörper (75) oder der Pulsationskörper (69) im Bereich der Koppelstange (73) eine permanente Magnetisierung aufweist bzw. aufweisen. - Schallwandlerkopf nach Anspruch 19 oder 20, dadurch gekennzeichnet, daß
die Koppelstange (73) zumindest im Bereich des Antriebskörpers (75) oder des Pulsationskörpers (69) und/oder der Antriebskörper (75) oder der Pulsationskörper (69) im Bereich der Koppelstange (73) eine Vorrichtung zur Erhöhung des Haftreibungswiderstandes zwischen der Koppelstange (73) einerseits und dem Antriebskörper (75) oder dem Pulsationskörper (69) andererseits, vorzugsweise in Form von zumindest einer steuer- und/oder regelbaren Krallvorrichtung und/oder, zumindest eines mit der Koppelstange (73), dem Antriebskörper (75) und/oder dem Pulsationskörper (69) verbundenen Elements, das elektrisch, pneumatisch und/oder hydraulisch gegen die Oberfläche des Antriebskörpers (75), des Pulsationskörpers (69) oder der Koppelstange (73) preßbar ist, umfaßt. - Schallwandlerkopf nach einem der Ansprüche 12 bis 21, dadurch gekennzeichnet, daß
die Positioniereinrichtung zumindest ein elastisches Element, vorzugsweise in Form eines Federelements (37, 39, 67, 71, 108), in der ersten Kammer (15, 15'), zweiten Kammer (17, 17', 17"), dritten Kammer (29, 29') und/oder vierten Kammer (33, 33'), insbesondere zwischen dem Pulsationskörper (69) einerseits und der Trennwand (7') des ersten Pulsationsumwandlungsglieds (13"') andererseits und/oder der Trennwand (7') einerseits und dem Antriebskörper (75) andererseits, anordbar und/oder während eines Betriebes des Schallwandlerkopfs (1, 1', 1", 1"', 1"", 1""') steuerbar und/oder regelbar umfaßt. - Schallwandlerkopf nach einem der vorangehenden Ansprüche, gekennzeichnet durch
eine Steuer- und/oder Regeleinrichtung (55, 83) zum Steuern und/oder Regeln der Schallabstrahlcharakteristiken, insbesondere in Wirkverbindung mit der Trennwand (7, 7'), dem ersten Pulsationsumwandlungsglied (13, 13',13", 13"', 100), dem Dämpfungselement (21), dem zweiten Pulsationsumwandlungsglied (31, 31', 31", 41, 106), einem Signalgeber für zumindest ein weiteres die Schallabstrahlungscharakteristik beeinflussendes externes Signal und/oder der Übertragungseinrichtung (25, 25', 49, 51, 59, 61, 69, 73, 75, 77, 79, 85, 93, 104). - Schallwandlerkopf nach Anspruch 23, dadurch gekennzeichnet, daß
die Steuer- und/oder Regeleinrichtung (83) mit der ersten Spule (85,93) oder zweiten Spule, insbesondere zum Erfassen einer Bewegung des Pulsationskörpers (69) realtiv zum Gehäuse (3') und/oder zum Herbeiführen einer Bewegung des Antriebskörpers (75) relativ zum Gehäuse (3'), der dritten Spule (79) oder der vierten Spule und/oder der Vorrichtung zur Erhöhung des Reibungswiderstandes, insbesondere zur bedarfsweisen mitnahmesicheren Kopplung des Pulsationskörpers (69) und des Antriebskörpers (75), in Wirkverbindung steht. - Schallwandlerkopf nach Anspruch 24, dadurch gekennzeichnet, daß
die Steuer- und/oder Regeleinrichtung (83) mit zumindest einem aktiven Glied, vorzugsweise eines Radios, Motorlagers, Dämpfers und/oder Shakers auf einer Spritzwand, insbesondere zur Übertragung von Bewegungsinformationen des Pulsationskörpers (69) an das aktive Glied, in Wirkverbindung steht - Schallwandlerkopf nach einem der Ansprüche 2 bis 25, dadurch gekennzeichnet, daß
die erste Membran (13, 13', 13", 13"'), der Kolben, die Scheibe (100), die zweite Membran (31, 31', 31"), die Trennscheibe (107) und/oder die Schallabstrahlungsscheibe (106) ein Elastomer, ein Verstärkungsgewebe, einen Kunststoff, ein Blech und/oder ein Metall, vorzugsweise Aluminium, umfaßt bzw. umfassen. - Schallwandlerkopf nach einem der Ansprüche 2 bis 26, dadurch gekennzeichnet, daß
die erste Membran (13, 13', 13", 13"'), die zweite Membran (31, 31', 31") und/oder die Trennscheibe (107) zumindest bereichsweise unterschiedliche Stärken, unterschiedliche Flexibilitäten und/oder unterschiedliche Formen aufweist bzw. aufweisen, vorzugsweise zum Bereitstellen eines steiferen Mittelbereichs (13'b, 31'b, 107b) und eines flexibleren Randbereichs (13'a, 31'a, 107a) und/oder mehrteilig ausgeführt ist bzw. sind. - Schallwandlerkopf nach einem der Ansprüche 2 bis 27, dadurch gekennzeichnet, daß
die Vorspannung der ersten Membran (13, 13', 13", 13"'), der zweiten Membran (31, 31', 31") und/oder der Trennscheibe (107) und/oder die Größe zumindest eines schwingungsfähigen Bereichs der ersten Membran (13, 13', 13", 13"'), der zweiten Membran (31, 31', 31"'), und/oder der Trennscheibe (107), insbesondere während des Betriebs des Schallwandlerkopfs (1, 1', 1", 1"', 1"", 1""), steuerbar und/oder regelbar ist bzw. sind. - Schallwandler in einem Abgas- und/oder Ansaugbereich einer Brennkraftmaschine, insbesondere eines Kraftfahrzeuges, mit einem Schallwandlerkopf (1, 1', 1", 1"', 1"", 1""') nach einem der vorangehenden Ansprüche.
- Verfahren zur Schallwandlung, insbesondere in einem Kraftfahrzeug, unter Verwendung eines Schallwandlerkopfs und/oder Schallwandlers, insbesondere nach einem der vorangehenden Ansprüche, gekennzeichnet durch
Anregen, insbesondere mittels Ansaug- und/oder Abgaspulsationen einer Brennkraftmaschine eines Kraftfahrzeuges, eines in einem ersten Abschnitt des Schallwandlerkopfs angeordneten und mittels einer Druckausgleichseinrichtung druckentlasteten ersten Pulsationsumwandlungsglieds, und Erzeugen einer Bewegung eines zweiten Pulsationsumwandlungsglieds, durch Übertragung einer Bewegung des ersten Pulsationsumwandlungsglieds mittels einer Übertragungseinrichtung auf das zweite Pulsationsumwandlungsglied. - Verfahren nach Anspruch 30, dadurch gekennzeichnet, daß
die Bewegung durch eine im wesentlichen starre Verbindung zwischen dem ersten Pulsationsumwandlungsglied und dem zweiten Pulsationsumwandlungsglied übertragen wird. - Verfahren nach einem der Anspruch 31, dadurch gekennzeichnet, daß
über eine Verbindungseinrichtung, vorzugsweise automatisch und/oder manuell, insbesondere während des Betriebes des Schallwandlerkopfs, bedarfsweise die im wesentlichen starre Verbindung zwischen dem ersten Pulsationsumwandlungsglied und dem zweiten Pulsationsumwandlungsglied hergestellt oder diese Verbindung gelöst wird, vorzugsweise in Abhängigkeit von der Frequenz der dem Schallwandlerkopf zugeführten Pulsationen. - Verfahren nach Anspruch 30 oder 32, dadurch gekennzeichnet, daß
die Bewegung des ersten Pulsationsumwandlungsglieds mittels einer Abtasteinrichtung, vorzugsweise elektromagnetisch, abgetastet wird, von der Abtasteinrichtung ein Bewegungssignal erzeugt wird, das Bewegungssignal mittels einer Steuer- und/oder Regeleinrichtung, vorzugsweise elektronisch, verarbeitet, insbesondere verstärkt, wird und das zweite Pulsationsumwandlungsglied in Abhängigkeit von dem Bewegungssignal mittels einer Antriebseinrichtung bewegt wird. - Verfahren nach Anspruch 33, dadurch gekennzeichnet, daß
das Bewegungssignal zumindest einem aktiven Glied zugeführt wird, und/oder dem Bewegungssignal zumindest ein zusätzliches Signal zumindest zeitweise zum Antrieb des zweiten Pulsationsumwandlungsglieds überlagert wird.
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DE10149169A DE10149169C1 (de) | 2001-10-04 | 2001-10-04 | Schallwandlerkopf und diesen umfassenden Schallwandler, insbesondere für ein Kraftfahrzeug |
DE10149169 | 2001-10-04 | ||
PCT/EP2002/010925 WO2003031227A1 (de) | 2001-10-04 | 2002-09-30 | Schallwandlerkopf, diesen umfassenden schallwandler und verfahren zur schallwandlung, insbesondere für ein kraftfahrzeug |
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DE10352704A1 (de) * | 2003-11-12 | 2005-06-16 | Mann + Hummel Gmbh | Vorrichtung zur Geräuschübertragung in einem Kraftfahrzeug mit Brennkraftmaschine |
DE102004041698B4 (de) * | 2004-08-28 | 2014-02-13 | Mann + Hummel Gmbh | Vorrichtung zur Geräuschübertragung in einem Kraftfahrzeug |
DE102005006914B4 (de) | 2005-02-16 | 2008-05-29 | Woco Industrietechnik Gmbh | Vorrichtung zur Schallkopplung zwischen einem Ansaugtrakt und/oder Motorraum und einem Fahrzeuginnenraum eines Kraftfahrzeuges |
RU2488176C2 (ru) * | 2011-09-02 | 2013-07-20 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Тольяттинский государственный университет" | Акустомеханический преобразователь |
DE102015106000A1 (de) | 2015-04-20 | 2016-10-20 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Schallgenerator für ein Kraftfahrzeug |
DE102015213990A1 (de) * | 2015-07-24 | 2017-01-26 | Robert Bosch Gmbh | Vorrichtung zum Aussenden und/oder Empfangen akustischer Signale |
DE102020100162B4 (de) * | 2020-01-07 | 2023-01-12 | Umfotec Gmbh | Vorrichtung zur Absenkung von Luft- und Körperschall |
GB202111213D0 (en) * | 2021-08-03 | 2021-09-15 | Mclaren Automotive Ltd | Improved sound bypass |
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DE10042012B4 (de) * | 1999-11-22 | 2004-08-19 | Daimlerchrysler Ag | Vorrichtung zur Geräuschgestaltung bei einem Kraftfahrzeug |
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DE50202339D1 (de) | 2005-03-31 |
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