Closed-type receiver with sound-transmitting interface

Abstract

A sound receiving device (5) for mounting within an outer shell of an object (1), the outer shell having a recess (1V), the sound receiving device comprising: a housing (10) disposed within the recess (1V) and forming a hollow space (10H); an acoustically transparent boundary surface (14) enclosing the hollow space (10H); and a sound receiving device (12) disposed within the housing (10) such that a medium is provided between the sound receiving device (12) and the acoustically transparent boundary surface (14).

Description

Technical Field

[0001] Embodiments of the present invention relate to a closed receiver (sound receiving device) having a sound-permeable boundary surface for attachment within the outline of an object. Further embodiments relate to a closed acoustic sensor having a sound-permeable boundary surface for sound reception for installation within the outline of an outdoor object or building. The application fields of the embodiments are, for example, movable or mobile objects, particularly objects such as vehicles, aircraft, and ships, but also buildings. In this regard, further embodiments relate to the outer wall or wall of a building provided with a corresponding sound receiving device, and movable or mobile objects.

Background Art

[0002] Receiving sound outdoors imposes specific requirements on the corresponding sensor system. These must be robust and weather-resistant. In addition, it is most important that such a sensor receives as little wind noise or traveling wind noise as possible. Therefore, a good aerodynamic profile or means for reducing wind noise plays an important role. Sound reception must be ensured.

[0003] When such a sensor is located within an object located outdoors or an object moving outdoors (for example, a self-standing unit or a vehicle), or installed in front of a house, what deteriorates the situation is the problem of how it can be incorporated in a reasonable way.

[0004] The conventional procedure is to install a microphone within a housing. The microphone is then connected to the outside air via a sound channel (or generally an air path). Therefore, an acoustic membrane can be introduced before or inside this acoustic channel to protect the microphone from moisture and prevent dust and the like from entering the channel. This concept is called an "open sensor". The housing is installed or attached within the outer casing of the object.

[0005] For example, German Patent Application Publication No. 102019220204, disclosing a structure for a microphone, is cited as prior art. Such a structure poses problems in the case of strong winds or relative winds induced at relatively high speeds, for example, when a vehicle is moving. Wind noise is induced at the opening, edges, and irregularities of the sound. Starting with a particular wind or object speed, the ratio between the useful signal and interference noise is shifted so much towards interference noise that the sensor becomes unusable even with software to suppress interference noise (prior art). A further problem is the robustness of the sensor. (Acoustic membranes are significantly more susceptible to damage compared to other stronger / more rigid materials). A third problem is that the described teaching becomes complicated because the acoustic membrane is adaptively clamped via the corresponding electronics / mechanism.

[0006] Because there is no barrier between the microphone and the outside air (except for an optional acoustic membrane), relatively good acoustic reception can be achieved when stationary and in windless conditions.

[0007] An alternative solution is to position the microphone or the entire sensor behind a fixed casing where flow or strong pressure fluctuations are not expected. In addition, there are few issues regarding robustness and weather resistance. In projects where microphones were installed inside vehicles for external noise perception, the following locations were tested, among others:

[0008] Within the passenger compartment (strong interference from passengers and music from the entertainment system), inside the exterior mirrors (strong attenuation by the mirrors and mirror housings), inside the trunk (strong attenuation by the vehicle body), and under the engine hood (strong interference from the engine and other components). All of these solutions reduce wind noise with isolation materials, but these materials do not allow airflow to pass through and also severely attenuate sound waves, thus significantly impairing useful signals. In addition, noise from the vehicle itself is received more strongly. Therefore, improved methods are needed. [Prior art documents] [Patent Documents]

[0009] [Patent Document 1] German Patent Application Publication No. 102019220204 Specification [Overview of the project] [Problems that the invention aims to solve]

[0010] The fundamental objective of this invention is to improve acoustic measurements, particularly in terms of reception quality and robustness at higher moving speeds, by using acoustic measuring devices mounted on the exterior. [Means for solving the problem]

[0011] This objective is achieved by the subject matter of the independent claim.

[0012] Embodiments of the present invention provide a sound receiving device in, for example, the exterior of an object such as a building, the outer wall or wall of a building, or further, in, for example, the exterior of a movable object such as a vehicle (for example, in the sense of its interior). The exterior has a recess, for example, in the sense of a depression or notch (for example, a hole into which the sensor is integrated with its exterior and housing). The sound receiving device is -Housing and, - Acoustically transparent interface, - Equipped with a receiver.

[0013] The housing is positioned or embedded in a recess, for example, to obtain a closed shape. The housing may have a hollow shape. The acoustically transparent interface closes this hollow space. The receiver (or microphone) is positioned in the housing or hollow space such that the medium is provided between the receiver and the acoustically transparent interface.

[0014] Examples of recesses include indentations on the front of a house, or holes / notches in the exterior / seat of a car.

[0015] Note that the outer shell forms a kind of surface layer of the object and has recesses that open toward the surface. The acoustically transparent interface boundaries the housing, which has a hollow space, toward the environment.

[0016] According to the embodiment, the medium may include, for example, air, or a material or another gas. According to the embodiment, the acoustically transparent interface forms a continuity of the outer casing of the object. Note that the acoustically transparent interface constitutes a separate material / object that terminates to be coplanar with the surrounding outer surface.

[0017] Embodiments of the present invention are based on the finding that a microphone enclosed within a housing, or more generally, a (enclosed) sound receiving means, can be positioned within a corresponding recess. The closed shape of the housing prevents moisture, dust, or other solid matter from entering the sensor. The recess can also offer an advantage in terms of robustness if the interface has a hole as a result of damage, because, due to its distance, moisture and dust cannot immediately come into contact with the microphone, and moisture can "drip" off. This has a favorable effect on the robustness and lifespan of the sensor. In this regard, embodiments of the present invention combine the advantages of a closed system (reduced wind noise, impermeability of moisture or dust) with the advantages of an open system (a direct sound path between the outside and the microphone, and thus improved transmission of airborne sound).

[0018] Due to the fact that the continuity of the outer casing is formed by an acoustically transparent interface, the planar surface of the interface can be created together with the surrounding boundary of the object, or the outer casing of the object, such as the front of a house. As a result, compared to other solutions, wind noise is hardly induced on this surface in the case of flow or wind, particularly because the flow or wind passes over the surface and does not experience non-uniformity.

[0019] This is particularly applicable when the flow is parallel to the surface. This is especially true for faster moving objects, such as vehicles. In the applicant's opinion, this characteristic is the greatest and most decisive advantage.

[0020] According to a further embodiment, the acoustically transparent boundary surface and / or the outer casing is / are coated with a varnish or provided with a varnish. As a result, a further advantage is that a varnish can be provided on the acoustically transparent boundary surface, and thus the acoustically transparent boundary surface is no longer visible when the same varnish used at the boundary is also used for a particular object, for example in the case of a vehicle.

[0021] According to an embodiment, a sound receiving device in which a medium or at least a part of the medium is formed by a sound-transmissive volume can include an acoustically transparent boundary surface. As a result of this variant, the acoustically transparent boundary surface becomes significantly more robust.

[0022] According to an embodiment, an acoustic insulator including, for example, sand, bitumen, foam, a polymer chamber and / or a further material is provided between the inside of the housing and the sound receiver. This has the advantage that noise from the object itself, for example from the engine compartment of a vehicle, is also reduced and received by the sound receiver.

[0023] According to an embodiment, in order to provide a consistent connection between the outer casing or a filling portion of the outer casing itself, for example to select a planar surface or a planar surface provided with a varnish, the housing can be connected to the outer casing via the rear part of the housing or to the filling portion of the outer casing or the object.

[0024] Here, it is pointed out that according to an embodiment, a cavity in the housing, or a recess of the housing, or even the housing itself can have, for example, a funnel shape. The funnel shape as one of the possible (inner) shapes is advantageous in itself from an acoustic point of view, and further shapes are also possible. The sound receiver can be arranged, for example, within the last third of the funnel. In some implementations, the funnel shape has the technical advantage that a certain acoustic filtering of the sound from secondary noise has already been implemented thereby.

[0025] Examples of acoustically transmissive boundary surfaces are given below. This can include, for example, one of the following materials.

[0026] - Rigid foam plate - Film rigid foam plate - PUR or PIR - Plastic plate - HDPE - High-strength plastic film - PMMA, PTFE or PET - Sheet metal Here, it is pointed out that in order to optimize the transition between the acoustically transmissive boundary surface and the outline of the object, a sealing element such as a rubber lip may be provided. According to a further embodiment, the acoustically transmissive boundary surface may be reinforced or hardened. This may, for example, have hardened struts. Alternatively, struts for supporting the acoustically transmissive boundary surface against the housing are also conceivable. According to a further embodiment, in order to combine the advantages of a rubber-drawn or flexible transition to the exterior and the attachment of the acoustically transmissive boundary surface, according to an embodiment, the acoustically transmissive boundary surface can be attached by a spring suspension device, for example, to the housing.

[0027] As already explained above, according to an embodiment, the outline and the acoustically transmissive boundary surface form a planar surface together with a planar transition. In the case of a curved outer surface, it is advantageous for the outer surface to also curve with a corresponding contour. Thus, according to an embodiment, the acoustically transmissive boundary surface may have a curved shape. According to an embodiment, the plan view of the recess, and thus the housing, and the acoustically transmissive boundary surface is, for example, circular or elliptical. This enables attachment without stress at the fulcrum. In theory, other shapes (angles, etc.) are also conceivable.

[0028] A further embodiment relates to an outer wall as an object provided with a sound receiving device, or a wall as an object.

[0029] In further embodiments, a sound receiving device is provided on a movable or transferable object, particularly a vehicle, aircraft, or ship.

[0030] Embodiments of the present invention are described below with reference to the accompanying drawings. [Brief explanation of the drawing]

[0031] [Figure 1] This is a schematic diagram of the basic implementation configuration of a sound receiving device. [Figure 2] This is a schematic diagram of an extended embodiment of the sound receiving device. [Figure 3] This is a further schematic diagram of a sound receiving device according to an extended embodiment for discussing the characteristics of arbitrary selection. [Modes for carrying out the invention]

[0032] Before describing embodiments of the present invention with reference to the accompanying drawings, it should be noted that the same elements and structures are given the same reference numerals, and therefore their descriptions are mutually applicable or interchangeable.

[0033] Figure 1 shows an object 1 having an object volume and an object surface 1o. The object can be, for example, the front of a house, or even the exterior of a movable object such as a car. Thus, surface 1o is the uppermost terminal layer of object 1. Starting from surface 1o, a recess 1v extends into the object body of object 1. A sound receiving device having a housing 10 is placed in the recess 1V. The sound receiving device comprises a housing 10 having a receiver 12, such as a microphone, placed inside the housing 10. The microphone is placed, for example, in the rear wall of the housing 10, i.e., in the cavity of the housing 10. On the opposite side of the rear, the housing 10 has a front, i.e., outer surface 1o An opening located on a surface that substantially follows it. department To prepare. From a geometric point of view, this is a housing opening. The departmentIt is almost continuous with the exterior 1O of object 1, meaning that the rear of the housing 10 protrudes into the volume of the object. Sound 20 is transmitted through the front exterior 1O and the opening department It hits. Then this sound can be received via microphone 12. According to the embodiment, microphone 12 is located deep inside the housing 10, for example, in front one way It is positioned in the rear third of the vehicle.

[0034] opening The department The hollow space 10H in which the microphone 12 is located is sealed by an acoustically transparent interface 14. As a result of the position of the microphone 12 in the hollow space 10H or at the rear of the hollow space, a distance is created between the microphone 12 and the acoustically transparent interface 14, which is filled with a medium such as air or another gas. The acoustically transparent interface 14 is defined, for example, as a planar body configured to transmit sound. The acoustic boundary layer may have a thickness of (as a lower limit) for example, at least 0.1 mm, at least 0.5 mm, at least 1 mm, at least 2 mm, or even at least 3 mm. The upper limit of the thickness is, for example, 10 mm, 5 mm, 3 mm, 2 mm, or 1.5 mm. Naturally, it is also conceivable to fill it with a solid or partially solid of a type such as foam (having pores, i.e., open foam). In the case of a solid material in the hollow space or a solid material as the "base" of the acoustic interface, a so-called solid-propagation receiver would be reasonable. In part, according to the embodiment, this can also mean that the region between the acoustically transparent interface and the receiver does not include a solid-filled region in the sense of a hollow space.

[0035] It should also be noted that solid or partially solid materials can be connected (as separate elements) to an acoustically transparent interface. For example, an acoustically transparent interface can be formed by sheet metal, varnished sheet metal, varnished support layers, or surface elements. In other words, a recess can be formed by a surface element (varnished sheet metal as well as the exterior) or the exterior itself that forms the acoustically transparent interface.

[0036] A further embodiment is a sound receiving device to be mounted inside or behind the outer casing of an object, A housing is positioned within a recess at the rear of the outer shell, forming a hollow space, It is part of the outer shell, and is an acoustically transparent interface that closes off the hollow space, The present invention provides a sound receiving device comprising a sound receiver arranged within a housing such that a medium is provided between the sound receiver and an acoustically transparent interface.

[0037] A solid or partially solid material related to the outer casing is provided between the acoustically transparent interface and the housing.

[0038] The operating modes of the structure already described above will be discussed below.

[0039] The area outside the housing 10, i.e., the region where sound 20 collides with the sound-transmitting membrane 14, is sealed by the sound-transmitting interface or, more generally, by the interface 14. The sound-transmitting properties induce sound pressure inside the housing 10, i.e., within the hollow space 10H, which can be received by the microphone 12. Sealing by the transparent interface 14 prevents outside air from coming into contact with the microphone 12, thus providing moisture permeability and weather resistance.

[0040] According to the embodiment, the sound-transmitting interface 14 is a surface onThe surface may be continuous therewith, or it may be continuous in a planar manner on its surface. This prevents the formation of co-noise in the transition area between the housing 10 and the object 1. For this purpose, according to the embodiment, a sealing element (not shown) may be provided. With respect to the sound-transmitting membrane 14, according to the preferred embodiment, it should be noted that it is made of a material that is solid, robust, moisture-impermeable, and weather-resistant, but nevertheless sufficiently sound-transmitting. For this reason, the surface is called the sound-transmitting interface. With respect to the media present on the outside and inside, it should be noted that the sound-transmitting interface can be in contact with air, for example, on both the outside and inside, and according to the further embodiment, other media such as fluids as well as gases, inert gases, can be used.

[0041] Regarding the microphone, it should be noted that the microphone converts the sound 20 that reaches inside the housing 10 into an electrical signal. Depending on the embodiment, further electronic equipment may also be provided in addition to the actual sensor. Typically, the electrical signal or an electrical signal pre-processed by the electronic equipment is guided outside the housing 10 via a cable. Wireless transmission, for example, is also possible.

[0042] An extended embodiment is shown below with reference to Figure 2.

[0043] Figure 2 shows a sound receiving device 5 having a housing 10, an inner housing 10, or a hollow space 10H of a microphone 12 placed inside the housing, the hollow space 62 being sealed by an acoustically transparent membrane 14. The housing 10 is embedded in the intermediate material 2 of the object 1, and the inner boundary 2i and outer boundary 2a are provided within the object 1.

[0044] A recess / hole, shaped to the form, is located within a movable or stationary object 1 or the boundary 2 and 2a of the front of a house, where it is in contact with the outside air and in which an acoustic sensor is installed. The housing 10 is inserted into this recess. According to the embodiment, the recess is usually circular, though not necessarily so. The housing 10 is usually inserted into this recess from the inside, though not necessarily so according to the embodiment. According to the embodiment, the housing 10 is usually mounted from the inside onto the boundary 2a and 2i of the front of the object or house, though not necessarily so.

[0045] In preferred but not required embodiments, the acoustically transparent interface 14 forms a planar surface together with the surrounding boundary 2a of the object 1 or the front of the house. The surface 14 is formed from an acoustically transparent material and, depending on the embodiment, can be curved or otherwise shaped, for example, according to the boundary 2a of the object 1 or the front of the house.

[0046] Optionally, the housing 10 includes an acoustic insulating material 22 facing inward toward the object 1 or building 10 in order to suppress noise from the object 1 or the building itself. This acoustic insulating material 22 can be implemented in various ways and is therefore not limited to any particular implementation in principle. One example is filling with sand, bitumen, foam or other material. A further example is several continuous chambers of air, which may also be filled with foam or sand or similar material. A further type of implementation is layers made of different materials having different resonant frequencies, with or without additional air cushions between the layers.

[0047] According to the embodiment, the inside of the housing 10 in which the receiver 12 is placed can take on different shapes. An acoustically beneficial shape that allows for optimized sound reception, such as a funnel, is preferred.

[0048] Herein, according to the embodiments, it is noted that rigid foam plates of PUR / PIR are suitable as the material for the acoustically transparent interface 14, with or without additional surface filming, such as the trademark name Kapa. Various solid (i.e., non-flexible) plastics, i.e., thin plastic plates such as HDPE, are also suitable. Various high-resistance plastic films made of materials such as PMMA, PTFE, or PET are also possible. Thin sheet metal is also possible. The present invention is not limited to a specific group of materials. The materials mentioned represent examples or various cases. All materials that satisfy the requirements described above also form part of the present invention. The thickness of the interface is important in any case. This represents a compromise between robustness or mechanical stability and acoustic transparency.

[0049] Regarding the receiver, it converts sound into voltage or current. All transducer principles are possible here. In embodiments, part of the acoustic sensor may be further electronic equipment installed within the housing (H). The electronic interface may be part of the sensor. This interface is typically, though not necessarily, connected to the interior of the object. Direct routing of cables from the housing to the interior of the object or dwelling is also conceivable. Transmitting acoustic signals wirelessly is also conceivable.

[0050] Regarding the arrangement of the acoustically transparent interface 14 and the surrounding boundary 2a of the front of the object or house, it should be noted that they preferably form a planar surface, i.e., are provided to be flush with the surface. Therefore, compared to other solutions, wind noise is hardly induced on these surfaces in the case of flow or wind, because the flow or wind passes over the surface and does not experience non-uniformity.

[0051] Regarding the signal quality in this teaching, it should be noted that, according to one embodiment, a compromise is made between a closed system and an open system. Compared to an open system, in the absence of wind, the transmission of airborne sound is worse (for the assumed material) (for example, a porous rigid foam plate is still a solid material, and nevertheless, the pores allow for better sound transmission compared to other solid materials, but the transmission is still inferior to a pure air channel or acoustic membrane), but the transmission in the case of wind is improved instead.

[0052] In another example / according to a further embodiment, the acoustically transparent interface 14 is supported from the rear (i.e., from the side facing the object or from the side where the receiver is located) by struts of another material, such as sheet metal or steel. This improves the rigidity and mechanical strength of the interface. The support can be implemented, for example, in a grid shape. The support can make the interface thinner and allow for better sound transmission without compromising mechanical strength compared to the case without support.

[0053] Therefore, these supports can extend parallel to the acoustic interface 14 as reinforcing structures in the form of bars or a grid arrangement. Alternatively, support of the surface 14 against the rear of the housing 10 by supports extending vertically or laterally is also conceivable.

[0054] Referring to Figure 3, further embodiments will be described, where the basic structure of modified form 1' in Figure 3 corresponds to modified form 1 in Figure 2, but it will be noted that there are also additional optional features.

[0055] In a further embodiment, the medium 26 between the sound-transparent interface 14' and the receiver 12 is made of a solid material capable of conducting solid-borne sound sufficiently well. In this example, the receiver 12 corresponds to, for example, a solid-borne sound receiver or accelerometer attached to this intermediate material. In a further embodiment, this intermediate material may be the same as the material of the sound-transparent interface. The sound-transparent interface is replaced by a sound-transparent volume.

[0056] In this respect, in this embodiment, the hollow space 26 is filled with a structure that also improves the mechanical robustness of the acoustically transparent interface 14'.

[0057] Further embodiments are consistent with all the embodiments described above, in that the acoustically transparent interface 14' is additionally varnished.

[0058] This means that the acoustically transparent interface 14' or the outer layer 2a' is varnished with varnish 28. In this case, although not always the case, if the surrounding boundary is varnished, the same varnish is usually used on this surrounding boundary as well.

[0059] Further examples / embodiments are derived from adaptations of all the embodiments described above, in which the housing (not the sound-transparent interface, if present) is spring-mounted to achieve improved acoustic isolation from the natural noise of the object or dwelling, where this isolation should be advantageous for this application.

[0060] Further examples / embodiments are derived from adaptations of all the embodiments described above, in which an acoustic insulating layer is additionally placed between the acoustically transparent interface and the boundary or housing 10 or both, for example in the form of a rubber lip, to achieve improved acoustic isolation from the boundary of the object or the front of the house, where this insulation should be advantageous in the application.

[0061] A preferred variant (according to one embodiment) will be described below, starting with the basic features and optional features described above. The structure substantially corresponds to that discussed in Figure 1, with the following additions / modifications.

[0062] • Microphone as a receiver • Film-rigid foam plate with additional varnish as an acoustically transparent interface • Circular acoustically transparent interface The acoustically transparent interface forms a smooth, planar surface together with the boundary.

[0063] • Funnel-shaped housing interior • Microphone inside the center of the funnel • No rubber lip or spring suspension • Sand as an acoustic insulating material The applications of the embodiments of the present invention are as follows.

[0064] • Topic: "The Appetite Automobile" • Acoustic external perception / environment detection • Detection of tire rolling noise (road surface recognition) • Detection of natural vehicle noise (self-diagnosis, condition monitoring) ·others • Detection of noise in the environment Road acoustic monitoring • Theft prevention for self-supporting objects (recording of audio and noise in case of theft attempts) • Detection of environmental noise accompanied by simultaneous detection of noise from the object itself. [Explanation of Symbols]

[0065] 12 Sound receiver 10. Housing including waveguide holder (housing) 14 Sound-transparent boundary surface (sound-transparent boundary) 22. Acoustic insulation / separation materials (acoustic insulating materials) 2I,2A boundary 10H Hollow space, for example, air 2. Intermediate materials (internal materials)

Claims

1. An object (1) comprising a sound receiving device (5) to be attached inside the outer casing (1o) of the object (1), wherein the outer casing (1o) of the object (1) forms a kind of surface layer of the object (1) and has a recess (1V) that opens toward the surface and extends into the object (1), and the sound receiving device (5) is A housing (10) is positioned within the recess (1V) of the outer shell (1o) of the object (1) and forms a hollow space (10h), The acoustically transparent interface (14) that closes the aforementioned hollow space (10H), The device comprises a receiver (12) disposed within the housing (10) such that a medium is provided between the receiver (12) and the acoustically transparent interface (14), A solid material or partial solid material related to the outer shell (1o) is provided between the acoustically transparent interface (14) and the housing (10), thereby the acoustically transparent interface (14) of the sound receiving device (5) forms a continuous portion of the outer shell (1o) of the object (1), the object (1).

2. The object (1) according to claim 1, wherein the medium or at least a portion of the medium is formed by a sound-transparent volume having the sound-transparent interface (14).

3. The object (1) according to claim 1, wherein an acoustic insulator, particularly including sand, bitumen, foam, and polymer chambers, is provided between the inside of the housing (10) and the receiver (12).

4. The object (1) according to claim 1, wherein the inside of the housing (10) is acoustically insulated.

5. The object (1) according to claim 1, wherein the housing (10) is connected to the outer shell (1o) or the backfill portion of the outer shell (1o) or the object (1) via the rear of the housing (10).

6. The object (1) according to claim 1, wherein the recess (1V) and / or the hollow space (10h) of the housing (10) has a funnel shape.

7. The sound-transmitting interface (14) is made of the following material Film-rigid foam plate, Rigid foam plate PUR or PIR plastic plate HDPE High-durability plastic film PMMA, PTFE, or PET The object (1) according to claim 1, which includes one sheet metal.

8. The object (1) according to claim 1, wherein the acoustically transparent interface (14) and / or the outer shell (1o) are provided with varnish.

9. The object (1) according to claim 1, further comprising at least one rubber lip provided in the transition area between the acoustically transparent interface (14) and the outer shell (1o).

10. The object (1) according to claim 1, wherein the acoustically transparent interface (14) is connected to the housing (10) by spring suspension and / or mounting.

11. The solid material or the partial solid material has or forms the acoustically transparent interface (14), or The object (1) according to claim 1, wherein the solid material or partial solid material is connected to the acoustically transparent interface (14), or the solid material or partial solid material is connected to the acoustically transparent interface (14), and the acoustically transparent interface (14) is formed by sheet metal, varnished sheet metal, varnish-supported layer, or surface element.

12. The sound-transmitting interface (14) is curved, and / or The object (1) according to claim 1, wherein the acoustically transparent interface (14) and / or the housing (10) and / or the recess (1V) are circular.

13. The object (1) according to claim 1, wherein the outer shell (1o) and the sound-transparent interface (14) form a planar or curved surface or a surface or a curved surface.

14. An object (1) comprising a sound receiving device (5) to be attached to the rear of the outer casing (1o) of the object (1), wherein the outer casing (1o) of the object (1) forms a kind of surface layer of the object (1) and has a recess (1V) that opens toward the surface and extends into the object (1), and the sound receiving device (5) is A housing (10) is positioned in a recess (1V) at the rear of the outer shell (1o) of the object (1) and forms a hollow space (10H), A part of the outer shell (1o) of the object, and an acoustically transparent interface (14) that closes the hollow space (10H), The sound receiver (12) is disposed within the housing (10) such that a medium in the form of a solid material or a partially solid material is provided between the sound receiver (12) and the acoustically transparent interface (14). The object (1) is provided between the acoustically transparent interface (14) and the housing (10) and the solid material or partially solid material connected to the acoustically transparent interface (14).

15. The object (1) according to claim 1 or 14, which is an outer wall or a wall as the object (1) and is equipped with a sound receiving device.

16. The object (1) according to claim 1 or 14, which is a movable or transferable object (1) equipped with a sound receiving device, in particular a vehicle, aircraft or ship.

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