Reactive sound transducer system

Abstract

The invention relates to a sound transducer system (100) comprising a full-range sound transducer (110) and a low-range sound device (120). A frequency dynamic which is substantially improved in comparison to the prior art is achieved in such a sound transducer system in that the oscillating diaphragms (111) of the full-range sound transducer (110) and of the low-range sound device (120) are arranged within two separate housings (150, 155) so as to have opposite emission directions, and a spatial region (122) with a determined volume is enclosed behind each sound transducer by means of a respective separating wall (113).

Description

[0001] REACTIVE SOUND TRANSDUCER SYSTEM

[0002] The invention relates to a sound transducer system with a full-range sound transducer and a woofer.

[0003] Sound transducer systems of the type described are used in the prior art to supplement the limited frequency spectrum of individual sound transducers, so that the most uniform quality possible is achieved in the generation of the frequency components of an acoustic signal in the range of approximately 20 Hertz to 20,000 Hertz.

[0004] However, all known transducer systems have the disadvantage that the overall transfer function continues to have frequency gaps in which the frequencies of an acoustic signal with a broad frequency spectrum are transmitted worse than in adjacent frequency ranges. This leads to an overall poor reproduction of the original

[0005] Acoustic signal .

[0006] The object of the invention is therefore to create a sound transducer system whose transmission function is more uniform and stable over a wide frequency range than that of known sound transducer systems.

[0007] For a sound transducer system of the type mentioned at the outset, this object is achieved according to the invention in that the vibrating membranes of the full-range sound transducer and the woofer are arranged within two separate housings so as to radiate in opposite directions, wherein a spatial area of ​​predetermined volume is closed off behind each of the sound transducers by means of a respective separating element.

[0008] Preferred embodiments of the invention are the subject of the dependent claims, the elements of which act in the sense of a further improvement of the approach to solving the problem underlying the invention.

[0009] The sound transducer system according to the invention, thanks to the above combination of features, makes it possible to improve and adapt the transmission function of each individual sound transducer by largely eliminating rearward-radiated sound waves. This makes it possible to seamlessly combine the entire transmission functions of the individual sound transducers in a way that is predictable, configurable, and optimizable. The performance and sound quality of the system according to the invention are thus noticeably better than that of comparable-sized sound transducer systems in the prior art.

[0010] According to a first preferred embodiment of the sound transducer system according to the invention, it is provided that there is a cavity with a predetermined volume between the two separating elements.

[0011] The cavity is preferably filled with a gas, for example air, and designed in such a way that it generates a rear counterpressure against the vibrations of the separating elements of the sound transducers.

[0012] According to an important preferred embodiment of the sound transducer system according to the invention, a separation ring defining the width of the cavity between the separation elements is mounted between the separation element that closes off the spatial area behind the full-range sound transducer and the separation element that closes off the spatial area behind the woofer.

[0013] The separation ring is preferably tapered towards the outside.

[0014] According to a further important preferred embodiment of the sound transducer system according to the invention, the separating element arranged behind the full-range sound transducer is formed from an elastic or solid, vibratable material and is connected in a vibratable manner to the inner surface of the respective housing wall, while the separating element arranged behind the woofer is also formed from an elastic or solid, vibratable material and is connected in a vibratable manner to the inner surface of the respective housing wall.

[0015] The solid material of the separating element arranged behind the woofer is preferably made of a multi-layer composite material.

[0016] Furthermore, a connecting phase is preferably provided in the region where each separating element adjoins the inner surface of the respective housing wall. The outer surface of a connecting phase is preferably arranged at an angle of 15-65° to the inner wall of the housing.

[0017] As an alternative to the connecting phase, a concave or convex groove can also be provided in the area where each separating element adjoins the inner surface of the housing wall in question.

[0018] Preferably, therefore, in the region where each separating element (113, 123) adjoins the inner surface of the respective housing wall (151, 156), a hollow groove formed as a recess can be provided, which reduces mechanical stresses and serves for precise sound guidance by efficiently deflecting sound waves and ensuring a more uniform distribution of the sound energy. The hollow groove preferably has a length, measured from the outside to the inside, of 5% to 30% of the diameter of a respective separating element and is designed such that it efficiently focuses the sound waves and minimizes unwanted interference.

[0019] For the purpose of sound guidance, the cove can be either logarithmic or parabolic, as well as either concave or convex, with an angle of curvature of the cove being dimensioned from 5° to 65° in order to enable targeted control of the sound waves.

[0020] For the purpose of sound guidance, the cove can be either logarithmically concave or logarithmically convex or alternatively parabolically concave or parabolically convex, whereby the angle of curvature of the cove can be measured at 5° to 65°.

[0021] Alternatively, the cove can be designed to be parabolically concave or convex on one side and logarithmically concave or convex on the other side for the purpose of sound guidance, with the respective angle of curvature of the cove being dimensioned from 5° to 65°.

[0022] A separating element (113, 123) can, for example, be

[0023] Partition wall (1131, 1231) is formed.

[0024] Preferably, a separating element (113, 123) contains a membrane (241) mounted for vibration, the mounting of which has an elasticity dimensioned to efficiently convert sound energy into kinetic energy. The membrane can be logarithmic or parabolic, convex or concave in shape to ensure optimal vibration adaptation and sound control, and is made of a composite material.

[0025] Furthermore, a separating element (113, 123) can have a sound-damping pressure chamber (240) which contains the membrane (241) mounted in an oscillating bearing (242) or bead (242) and a closing plate (243) provided with a valve (244), wherein the internal pressure of the pressure chamber can be adjusted via the valve (244).

[0026] The bead is preferably provided with identical or different structures that influence the vibration behavior.

[0027] The bead contains a logarithmic or parabolic, concave or convex recess for the purpose of sound guidance, with the angle of curvature of the bead being between 5° and 65°.

[0028] Alternatively, the surround may contain a parabolic or logarithmic, concave or convex recess for the purpose of sound guidance, with the angle of curvature of the surround being between 5° and 65°.

[0029] Alternatively, the bead may contain a parabolically concave or convex depression on one side for the purpose of sound guidance and a logarithmically concave or convex depression on the other side, with the respective angle of curvature of the bead being dimensioned from 5 ° to 65 °.

[0030] The parabolic geometry or the logarithmic shape are designed to precisely focus the sound waves and guide them to the logarithmic absorber in order to ensure a sound-adapted interaction while avoiding linear shapes.

[0031] According to a simple embodiment of the sound transducer system according to the invention, a separating element is formed by a partition wall.

[0032] According to a particularly effective embodiment of the sound transducer system according to the invention, a separating element contains a membrane mounted so as to vibrate, the mounting of which has an elasticity which is dimensioned in order to efficiently convert sound energy into kinetic energy.

[0033] A separating element has in particular a sound-damping pressure chamber which contains the membrane mounted in an oscillating bearing (bead) and, opposite the membrane, a closing plate provided with a valve, wherein an internal pressure of the pressure chamber can be adjusted via the valve.

[0034] A pressure chamber ring is preferably provided between the membrane and the end plate, wherein a connecting phase or groove is provided in the area where the pressure chamber ring adjoins the inner surface of the relevant housing wall, similar to a partition wall.

[0035] According to a further preferred embodiment of the sound transducer system according to the invention, a logarithmic sound wave absorber is arranged behind each of the sound transducers to further reduce the sound waves radiated backwards into the housing from each of the sound transducers.

[0036] A sound wave absorber can, for example, be held within a housing by means of a cross-shaped connecting web, wherein the tip of the respective sound wave absorber is firmly connected to the center of the cross-shaped connecting web and the ends of the connecting web remote from the center are firmly connected to the inner wall of the respective housing.

[0037] A sound wave absorber is preferably conical and is arranged in the housing so that the tip of each absorber is arranged near the back of each sound transducer.

[0038] Furthermore, an open base surface of an absorber, opposite the tip, is preferably arranged near each of the separating elements. A respective housing is preferably cylindrical.

[0039] According to a further preferred embodiment of the sound transducer system according to the invention, a sound wave absorber contains an absorption body with an inlet opening for the input of sound waves to be dampened and an outlet opening opposite the inlet opening, wherein the absorption body has a first end in the form of a tip near the inlet opening and an other end in the form of an open base surface opposite the first end and near the outlet opening, which are connected to one another via a central axis, wherein one or more open or closed sound guide walls are formed laterally of the central axis between the first end and the other end, which begin at the inlet opening near the central axis and increase in width outwards towards the other end and end at a terminal edge in the region of the other end,whose starting point is adjacent to the central axis and whose end point is located at a predetermined distance from the central axis.

[0040] The width of a respective sound guide wall preferably increases linearly, logarithmically or parabolically starting at the entrance opening near the central axis towards the other end, wherein the first end of the absorption body is opposite the end point of the end edge remote from the central axis via a preferably straight connecting line, and wherein a respective outer edge of a sound guide wall comes to lie on the connecting line.

[0041] A concise definition of individual components of the invention, including their function, is given below. Full-range transducer (110) & woofer (120):

[0042] • These transducers are arranged in separate housings and radiate in opposite directions to avoid destructive interactions.

[0043] • The full-range transducer covers the high and medium to low frequencies, while the woofer is responsible for particularly low frequencies.

[0044] Separating elements ( 113 , 123 ):

[0045] • These separate the rear area of ​​the full-range transducer and woofer and are installed in the respective housings.

[0046] • The separation element of the full-range transducer is vibrating and connected to the inner wall of the cabinet, while the separation element of the woofer is rigid and consists of a solid material.

[0047] • The separating element of the full-range transducer is vibratable and can be made of rigid or elastic composite material and is vibratably connected to the inner wall of the cabinet, while the separating element of the woofer is either rigid or vibratable and can also be made of rigid or elastic composite material.

[0048] • Function: They limit the spatial geometries and prevent the retransmission of sound and minimize structure-borne noise.

[0049] Cavity ( 130 ) : • The cavity between the separating elements is filled with an acoustically optimized gas ( e . g . air ) .

[0050] • Function: The cavity acts as a pressure equalization chamber and influences the vibrations of the separating elements. It reduces sound reflections, ensures phase coherence, and prevents distortions in the sound spectrum without affecting the vibration of the separating elements.

[0051] Separation ring ( 140 ):

[0052] • The separation ring mechanically separates the separating elements and ensures that no structure-borne vibrations are transmitted between the housings.

[0053] • Tapered : It is pointed on the outside to prevent mechanical interference between the housing walls .

[0054] Connection phase ( 152 ):

[0055] • This phase serves to mechanically connect the separating elements to the housing wall.

[0056] • Function: It stabilizes the geometry at the weak point, reduces mechanical stresses and minimizes structure-borne noise by creating a clean transition zone between the separating elements and the housing wall.

[0057] Cove:

[0058] • The cove is a specific acoustic design element on the edges of the cabinet walls and partition elements.

[0059] • Function: It reduces mechanical stresses and prevents material fatigue and at the same time ensures efficient sound guidance by optimally redirecting sound waves and minimizing phase shifts.

[0060] Sound wave absorbers ( 1000 ):

[0061] • These absorbers are located behind the sound transducers and are shaped in an ogarithmic-conical manner.

[0062] • Function: The sound wave absorber's design reduces rearward-radiated sound waves by effectively and smoothly absorbing the sound deflected by the cove and the separating element or the pressure chamber silencer, and by preventing reflections and cross-frequency crosstalk. This prevents feedback and improves the clarity of the radiated sound by allowing the compression in the enclosure to be used to generate the sound without interference.

[0063] Pressure chamber with membrane ( 240 , 241 , 243 ) :

[0064] • The pressure chamber silencer with a vibrating membrane controls and absorbs the vibrations in the housing and ensures that the sound is generated without disturbing feedback or resonances.

[0065] • Function: The pressure chamber absorbs sound energy and prevents rearward sound waves from affecting the sound source's diaphragm. The geometrically and structurally adjustable diaphragm ensures optimal vibration control, sound control, and absorption.

[0066] Cross-shaped connecting bridge ( 170 ):

[0067] • This holds the sound wave absorber within the housing. • Function: It securely fixes the absorber in the optimal position behind the transducers, so that the tip of the absorber is close to the rear of the transducer. The position is adjusted to the specific sound flow.

[0068] Bass redirection:

[0069] • Function: Bass redirection is a critical element of the system, ensuring that the low frequencies reach the listener in phase with the mid and high frequencies. It uses the spatial delay of the bass to create constructive interference by redirecting the low frequencies.

[0070] • Mechanism: Bass redirection is achieved by a parabolic or logarithmic dish, or simply by proximity to the wall. The geometrically adjusted reflection compresses the low tones more strongly, but without interference. This specifically returns the bass to the listener earlier and synchronizes it with the higher frequencies.

[0071] • Effect: This results in improved spatial bass reproduction and ensures that the bass is integrated precisely and coherently into the overall sound image, enabling an authentic and natural sound perception.

[0072] Inertia optimization:

[0073] • The natural delay of the bass range is not only compensated but is even used to compensate for the temporal discrepancy between the high and low frequencies. This improves the sound coherence considerably,

[0074] Adjustment of the respective inertia.

[0075] Phase coherence through sound redirection:

[0076] • Addition to the bass deflection : The rotated phase position of the bass range is corrected by the deflection in such a way that the bass arrives spatially synchronously with the higher frequencies due to the longer overall path , although it would normally only be more distant and less perceptible due to the longer wavelength .

[0077] • Combination with inertia optimization: These two mechanisms (targeted bass redirection and targeted use of inertia) together ensure increased error-free compression and coherent sound perception across the entire frequency spectrum.

[0078] The inventive transducer system ensures optimal phase coherence and minimal distortion across the entire frequency range through its precise separation of mechanical vibrations and sound waves. The separation ring mechanically isolates the housing and housing walls, the cavity ensures pressure equalization through counterpressure, while the sound wave absorber eliminates disruptive, returning sound reflections. This synergy between the components ensures authentic and unadulterated sound reproduction in multiple disciplines. The inventive transducer system is explained below using a preferred embodiment, which is illustrated in the figure of the drawing. Therein:

[0079] Fig. 1 shows a preferred embodiment of the sound transducer system according to the invention in a schematic cross-sectional view;

[0080] Fig. 2 shows the separation ring of the preferred embodiment of the sound transducer system according to the invention shown in Fig. 1 in a side view;

[0081] Fig. 3 shows the sound wave absorber of the preferred embodiment of the sound transducer system according to the invention shown in Fig. 1 in a side view;

[0082] Fig. 4 shows the sound wave absorber of the preferred embodiment of the sound transducer system according to the invention shown in Fig. 1 in a view from above;

[0083] Fig. 5 shows the sound wave absorber of the preferred embodiment of the sound transducer system according to the invention shown in Fig. 1 in a view from below;

[0084] Fig. 6 shows a preferred embodiment of the silencer device according to the invention in a side view;

[0085] Fig. 7 shows the silencer device according to the invention shown in Fig. 6 in a view obliquely from above;

[0086] Fig. 8 shows the silencer device according to the invention shown in Fig. 6 in a view obliquely from below; Fig. 9 shows the absorber of the system according to the invention in a perspective view;

[0087] Fig. 10 shows the absorber of the system according to the invention in a view from below.

[0088] The sound transducer system 100 according to the invention shown in Figures 1 to 10 contains a full-range sound transducer 110 and a woofer 120, wherein the vibrating membranes 111 of the full-range sound transducer 110 and the woofer 111 are arranged radiating in opposite directions within two separate housings 150, 155, and wherein a spatial region 112 of predetermined volume is closed off behind each of the sound transducers by means of a respective partition wall 113, 123.

[0089] Between the two partition walls 113, 123, a closed or semi-open cavity of predetermined volume is provided, which is filled with gas and is designed to generate a rear counterpressure against the vibrations of the partition walls 113, 123 to close off the spatial region 122 of the full-range sound transducer 110.

[0090] Between the first partition wall 113, which closes off the spatial area 112 behind the full-range transducer 110, and the second partition wall 123, which closes off the spatial area 112 behind the woofer 120, a separation ring 140 is mounted. This separation ring defines the width of the cavity between the partition walls 113, 123 and is tapered towards the outside. The separation ring 140 ensures that no mechanical vibrations are transmitted from one housing to the other, thus preventing the transmission of structure-borne sound.

[0091] The partition wall 113 arranged behind the full-range transducer 110 can be formed from a vibratable material or a rigid composite material and can be vibratably connected to the inner surface of the enclosure wall 151. The partition wall 123 arranged behind the woofer 120 can also be made from a vibratable material or a rigid composite material and can be either vibratably or rigidly connected to the inner surface of the enclosure wall 151.

[0092] The solid material of the partition wall 123 arranged behind the woofer 120 is formed from a multi-layer composite material and can have structures.

[0093] Furthermore, a connecting phase 152 is provided in the region of the adjoining of each partition wall 113, 123 to the inner surface of the housing wall 151, wherein the outer surface of a connecting phase 152 is arranged at an angle of 15 - 65 ° to the inner wall of the housing 150.

[0094] On the inner surface of the respective housing wall 151, 156, a hollow groove 1133 is provided in the form of a recess, which reduces mechanical stresses.

[0095] The groove 1133 has a length, measured from the outside to the inside, of 3% to 40% of the diameter of a respective separating element. The groove 1133 is designed to be logarithmic or parabolic, concave or convex for the purpose of sound guidance, with the angle of curvature of the groove being measured at 5° to 65°.

[0096] A separating element 113, 123 is formed by a partition wall 1131, 1231 which contains a membrane 241 mounted so as to vibrate, the mounting of which has an elasticity which is dimensioned to efficiently convert sound energy into kinetic energy.

[0097] A separating element 113, 123 has a sound-damping pressure chamber 240 which contains the membrane 241 mounted in an oscillating bearing 242 or bead 242 and a closing plate 243 provided with a valve (244), wherein the internal pressure of the pressure chamber can be adjusted via the valve 244.

[0098] The surround and the membrane are provided with structures that influence the vibration behavior.

[0099] For the purpose of sound guidance, the surround contains a logarithmic or parabolic, concave or convex recess, with an angle of curvature of the surround being between 5 ° and 65 °.

[0100] The logarithmic or parabolic shape is designed to precisely and accurately focus the sound waves and guide them to the logarithmic absorber, ensuring a sound-adapted interaction while avoiding linear shapes. According to the embodiment of the inventive sound transducer system shown in Figures 6 to 8, each separating element 113, 123 is formed by a vibration-mounted logarithmic or parabolic membrane 241, the mounting of which has an elasticity dimensioned to efficiently convert sound energy into kinetic energy.

[0101] The respective membrane 241 of a separating element 113, 123 designed in this way is arranged in a sound-damping pressure chamber 240, which on the one hand contains the membrane 241 mounted in an oscillating bearing 242 (bead) and on the other hand, opposite the membrane 241, a closing plate 243 provided with a valve 244, wherein an internal pressure of the pressure chamber 240 can be adjusted via the valve 244 mounted in the closing plate 243.

[0102] A pressure chamber ring 223 is provided between the membrane 241 and the end plate 243, wherein a connecting phase (252) or groove (1142) is provided in the region of the adjoining of the pressure chamber ring (223) to the inner surface of the respective housing wall (151, 156).

[0103] To further reduce the sound waves radiated backwards into the housing 150, a logarithmic sound wave absorber 1000 is arranged behind each of the sound transducers, which is held within the housing 150 by means of a cross-shaped connecting web 170, wherein the tip 1113 of the sound wave absorber 1000 is firmly connected to the center of the cross-shaped connecting web 170 and the ends 172 of the connecting web 170 remote from the center 171 are firmly connected to the inner wall of the housing 150.

[0104] Each logarithmic sound wave absorber 1000 is conical in shape and is arranged in the housing 150 such that the tip 1113 of each sound wave absorber 1000 is arranged near the back of each sound transducer 110, 120 and a base surface 1114 of a sound wave absorber 1000 opposite the tip 1113 is arranged near a respective one of the partition walls 113, 123.

[0105] The housing is cylindrical in shape.

[0106] A logarithmic sound wave absorber 1000 contains an absorption body 1110 with an inlet opening 1111 for the entrance of sound waves to be damped and an outlet opening 1112 opposite the inlet opening 1111, wherein the absorption body 1110 has a first end 1113 close to the inlet opening 1111 and a first end 1113 opposite the outlet opening

[0107] 1112 near other end 1114, which are connected to each other via a central axis 1115, wherein laterally to the central axis 1115 between the first end

[0108] 1113 and the other end 1114 one or more sound guide walls 1120 are formed, which begin at the inlet opening 1111 close to the central axis and increase in width outwards towards the other end 1114 and end in the region of the other end 1114 at a terminal edge 1130, the starting point 1131 of which borders on the central axis 1115 and the end point 1132 of which is arranged at a predetermined distance from the central axis 1115.

[0109] The width of a respective sound guide wall 1120 increases linearly or logarithmically starting at the inlet opening 1111 near the central axis towards the other end 1114, wherein the first end 1113 of the absorption body 1110 is opposite the end point 1132 of the end edge 1130 remote from the central axis 1115 via a straight connecting line 1140, and wherein a respective outer edge of a sound guide wall 1120 comes to lie on the connecting line 1140.

[0110] The above-explained embodiment of the invention serves only the purpose of a better understanding of the inventive teaching set out in the claims, which as such is not restricted by the embodiment.

[0111] List of reference symbols

[0112] 100 transducer system

[0113] 110 full-range transducers

[0114] 111 vibrating diaphragm

[0115] 112 room area

[0116] 113 Separator

[0117] 1131 Partition wall

[0118] 114 Transducer rear panel

[0119] 120 woofers

[0120] 121 vibrating diaphragm

[0121] 122 room area

[0122] 123 Separator

[0123] 1231 partition wall

[0124] 124 bass tones r-back

[0125] 130 cavity

[0126] 140 Separation ring

[0127] 150 first housing

[0128] 155 second housing

[0129] 151 Housing wall of the first housing

[0130] 152 Connection phase

[0131] 156 Housing wall of the second housing

[0132] 170 connecting bridge

[0133] 171 Center

[0134] 172 distant end

[0135] 223 Pressure chamber ring

[0136] 240 pressure chamber

[0137] 241 Membran

[0138] 242 Swing bearing, bead

[0139] 243 End plate

[0140] 244 Valve 250 From end ring

[0141] 252 Connection phase of the pressure chamber

[0142] 1000 Schal Iwellen- Absorber

[0143] 1110 Absorption body

[0144] 1111 Entrance opening

[0145] 1112 Exit opening

[0146] 1113 tip, first end

[0147] 1114 Base area, second end

[0148] 1115 Central Axis

[0149] 1120 Sound barrier

[0150] 1130 From end edge

[0151] 1131 starting point

[0152] 1132 Endpoint

[0153] 1133 cove

[0154] 1140 connecting line

Claims

Patent claims 1. Sound transducer system (100) with a full-range sound transducer (110) and a woofer (120), characterized in that the vibrating membranes (111), (121) of the full-range sound transducer (110) and the woofer (120) are arranged radiating in opposite directions within two separate housings (150, 155), wherein a spatial area (112), (122) of predetermined volume behind each of the sound transducers (110), (120) is closed off or partially closed by means of a respective separating element (113), (123).

2. Sound transducer system (100) according to claim 1, characterized in that a cavity (130) of predetermined volume is provided between the two separating elements (113), (123).

3. Sound transducer system (100) according to claim 2, characterized in that the cavity (130) is filled with an acoustically optimized gas which specifically influences the vibrations of the separating elements (113, 123) so that sound reflections are minimized and the reaction on the membrane movements is reduced.

4. Sound transducer system (100) according to one of claims 2 or 3, characterized in that the cavity (130) ensures the phase coherence of the sound waves and avoids distortions due to pressure imbalances in the sound spectrum.

5. Sound transducer system (100) according to claim 4, characterized in that the separation ring (140) is tapered towards the outside in order to avoid mechanical and To prevent acoustic interference between the enclosures. This tapered ring mechanically separates the separating elements and enclosure walls to prevent the transmission of structure-borne vibrations.

6. Sound transducer system (100) according to one of the preceding claims, characterized in that the separating element (113) arranged behind the full-range sound transducer (110) is formed from a vibratable, solid or elastic material which is connected to the inner surface of the respective housing wall (151), and the separating element (123) arranged behind the woofer (120) is also formed from a vibratable solid or elastic material which is vibratably connected to the inner surface of the respective housing wall (156).

7. Sound transducer system (100) according to claim 6, characterized in that the solid or elastic material of the separating element (123) arranged behind the woofer (120) is formed from a multi-layer composite material.

8. Sound transducer system (100) according to one of claims 6 or 7, characterized in that in the region of the adjoining of each separating element (113), (123) to the A connecting phase (152) is provided on the inner surface of the respective housing wall (151, 156).

9. Sound transducer system (100) according to claim 8, characterized in that the outer surface of a connecting phase (152) is arranged at an angle of 4 - 40° to the inner wall of the housing (150).

10. Sound transducer system (100) according to one of claims 6 or 7, characterized in that in the region of the adjoining of each separating element (113, 123) to the inner surface of the respective housing wall (151, 156) a hollow groove (1133) designed as a recess is provided, which reduces mechanical stresses and sound interference.

11. Sound transducer system (100) according to claim 10, characterized in that the groove (1133) has a length measured from the outside to the inside of 5% to 30% of the diameter of a respective separating element.

12. Sound transducer system (100) according to one of claims 10 or 11, characterized in that the hollow groove (1133) is designed logarithmically or concavely or convexly for the purpose of sound guidance, wherein an angle of curvature of the hollow groove is dimensioned from 5° to 65°.

13. Sound transducer system (100) according to one of claims 10 or 11, characterized in that the hollow groove (1133) is parabolically concave or convex for the purpose of sound guidance, wherein an angle of curvature of the hollow groove is dimensioned from 5° to 65°.

14. Sound transducer system (100) according to one of claims 10 or 11, characterized in that the hollow groove (1133) is designed to be parabolically concave or convex on one side and logarithmically concave or convex on the other side for the purpose of sound guidance, wherein a respective angle of curvature of the hollow groove is dimensioned from 5° to 65°.

15. Sound transducer system (100) according to one of claims 1 to 10, characterized in that a separating element (113, 123) is formed by a partition wall (1131, 1231).

16. Sound transducer system (100) according to one of claims 1 to 15, characterized in that a separating element (113, 123) contains a logarithmic or parabolic membrane (241) mounted so as to be capable of oscillation, the mounting of which has an elasticity dimensioned to efficiently convert sound energy into kinetic energy.

17. Sound transducer system (100) according to claim 16, characterized in that a separating element (113, 123) has a sound-damping pressure chamber (240) which contains the logarithmic or parabolic membrane (241) mounted in an oscillating bearing (242) or bead (242) and a closure plate (243) provided with a valve (244), wherein the internal pressure of the pressure chamber can be adjusted via the valve (244).

18. Sound transducer system (100) according to claim 17, characterized in that the bead is provided with structures influencing the vibration behavior.

19. Sound transducer system (100) according to one of claims 17 or 18, characterized in that the bead contains a logarithmically concave or convex recess for the purpose of sound guidance, wherein an angle of curvature of the bead is dimensioned from 5° to 65°.

20. Sound transducer system (100) according to one of claims 17 or 18, characterized in that the bead is designed for the purpose a sound guide contains a parabolic concave or convex recess, with an angle of curvature of the bead being between 5° and 65°.

21. Sound transducer system (100) according to one of claims 17 or 18, characterized in that the bead contains a parabolically concave or convex recess on one side for the purpose of sound guidance and a logarithmically concave or convex recess on the other side, wherein a respective angle of curvature of the hollow groove is dimensioned from 5° to 65°.

22. Sound transducer system (100) according to one of claims 17 or 18 and 20 or 21, characterized in that the parabolic geometry or the logarithmic shape is designed to precisely focus the sound waves and guide them to the logarithmic absorber in order to ensure a sound-adapted interaction while avoiding linear shapes.

23. Sound transducer system (100) according to one of claims 17 to 22, characterized in that a pressure chamber ring (223) is provided between the membrane (241) and the end plate (243), wherein a connecting phase (252) or groove (1133) is provided in the region of the adjoining of the pressure chamber ring (223) to the inner surface of the respective housing wall (151, 156).

24. Sound transducer system (100) according to one of the preceding claims, characterized in that in order to reduce the sound waves radiated backwards into the housing (150), behind each of the sound transducers (110, 120) a logarithmic sound wave absorber (1000) is arranged.

25. Sound transducer system (100) according to claim 24, characterized in that a logarithmic sound wave absorber (1000) is held within a housing (150, 155) by means of a cross-shaped connecting web (170), wherein the tip (1113) of the respective sound wave absorber (1000) is firmly connected to the center (171) of the cross-shaped connecting web (170).

26. Sound transducer system (100) according to one of claims 24 or 25, characterized in that a logarithmic sound wave absorber (1000) is conical and is arranged in the housing (150) such that the tip (1113) of each absorber (1000) is arranged near the rear side (114), (124) of each sound transducer (110), (120).

27. Sound transducer system (100) according to one of claims 24 to 26, characterized in that a base surface (1114) of an absorber (1000) opposite the tip (1113) is arranged near a respective one of the separating elements (113), (123).

28. Sound transducer system (100) according to one of claims 24 to 27, characterized in that a respective housing (150, 155) is cylindrical.

29. Sound transducer system (100) according to one of claims 24 to 28, characterized in that a logarithmic sound wave absorber (1000) comprises an absorption body (1110) with an inlet opening (1111) for the input of dampening sound waves and one of the entrance opening (1111) opposite the outlet opening (1112).

Images