Loudspeaker and vehicle

Abstract

The utility model relates to the technical field of loudspeakers, and provides a loudspeaker and a vehicle, the loudspeaker comprises a sound production unit and a sound amplification structure, the sound production unit is used for emitting sound waves to the front; the sound amplification structure is located on the front side of the sound production unit, the sound amplification structure comprises a reflection panel used for reflecting the sound waves, and the plate surface of the reflection panel is parallel to the axial direction and the radial direction of the loudspeaker. And the sound amplification structure capable of reflecting sound waves is additionally arranged, so that the propagation range and the coverage area of sound are expanded. Through the design, the directivity and the distribution uniformity of the sound can be improved, and the coverage range of the audio in the vehicle is enlarged, so that the sound listening experience is improved. The airflow cavity in the design can effectively absorb interference of sound waves, and the problems of standing waves, turbulence and the like are solved. Therefore, the definition and the stability of sound can be improved, the distortion and the deformation of the sound are reduced, and the reduction degree and the accuracy of audio are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of loudspeakers, in particular to a loudspeaker and a vehicle. Background Art

[0002] With the development of vehicles, more and more users pay attention to the sound effect of car audio. Car audio has become an important part of the vehicle.

[0003] Speakers generally work through the vibration of the diaphragm. Conventional diaphragm vibration radiates forward and backward in the cavity. Speakers in the prior art have poor directivity in the high-frequency area. Poor high-frequency directivity will lead to uneven distribution of sound during audio playback. This means that the sound may feel too concentrated in some positions, while the sound may feel weak in other positions, affecting the overall listening experience. Due to poor high-frequency directivity, the high-frequency sound emitted by the speaker may be more easily disturbed by the environment and obstacles, causing the sound to shift or distort. This may cause distortion and inaccuracy of the sound, affecting the restoration and clarity of the audio. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a speaker and a vehicle to improve the playing effect of the speaker.

[0005] In order to achieve the above-mentioned object and other related objects, the utility model provides a loudspeaker, comprising:

[0006] A sound-generating unit, used for emitting sound waves in front of it;

[0007] A sound amplification structure is located in front of the sound-emitting unit, and the sound amplification structure includes a reflection panel for reflecting the sound waves, wherein a surface of the reflection panel is parallel to the axial direction and radial direction of the speaker.

[0008] In a specific embodiment of the present invention, a plurality of the reflective panels are provided, and the plurality of reflective panels are evenly spaced around the axis of the speaker.

[0009] In a specific embodiment of the present invention, the inner ring frame and the outer ring frame are staggered in the axial direction of the speaker, and the inner ring frame is located in front of the outer ring frame.

[0010] In a specific embodiment of the present invention, the sound amplification structure includes an outer ring frame and an inner ring frame coaxially arranged with the loudspeaker, and the outer ring frame and the inner ring frame are respectively connected to the two end plate edges of each of the reflective panels.

[0011] In a specific embodiment of the present invention, an end of the front end edge of the reflective panel close to the axis of the speaker is located in front of an end thereof away from the axis of the speaker, and the front end edge of the reflective panel is an arc-shaped edge.

[0012] In a specific embodiment of the utility model, a rear shell is further included, wherein the rear shell is located at the rear side of the sound-emitting unit, and an airflow cavity is provided in the rear shell, wherein the airflow cavity is used to diffuse the airflow and sound waves generated by the vibration of the sound-emitting unit.

[0013] In a specific embodiment of the present invention, a plurality of blades are disposed in the airflow cavity, and the plurality of blades are evenly spaced around the axis of the speaker.

[0014] In a specific embodiment of the present invention, the blade gradually approaches the sound-emitting unit from an end far from the axis of the speaker to an end close to the axis of the speaker.

[0015] In a specific embodiment of the present invention, the blade is a spiral blade.

[0016] The utility model also includes a vehicle, comprising the loudspeaker as described above.

[0017] The utility model proposes a speaker and a vehicle, which are additionally provided with a sound amplification structure capable of reflecting sound waves, so as to expand the propagation range and coverage area of ​​the sound. Through this design, the directivity and distribution uniformity of the sound can be improved, and the coverage range of the audio inside the vehicle can be increased, thereby improving the listening experience. The airflow cavity in the design can effectively absorb the interference of sound waves, and solve the problems of standing waves and turbulence. This can improve the clarity and stability of the sound, reduce the distortion and deformation of the sound, and improve the restoration and accuracy of the audio. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A structural diagram of a loudspeaker in one embodiment of the utility model;

[0020] Figure 2 is a cross-sectional view of a cone assembly in one embodiment of the utility model;

[0021] Figure 3 An exploded view of a loudspeaker in one embodiment of the present invention;

[0022] Figure 4 A schematic diagram of sound wave transmission of a loudspeaker in one embodiment of the utility model;

[0023] Figure 5 A schematic diagram of the relationship between the off-axis direction and the sound pressure curve in one embodiment of the utility model;

[0024] Figure 6 It is a schematic diagram of the relationship between the off-axis direction and the sound pressure curve in the prior art.

[0025] Explanation of the reference numerals: 10, sound amplification structure; 11, reflection panel; 12, outer ring frame; 13, inner ring frame; 20, sound membrane; 30, damping block; 40, voice coil; 50, bracket; 60, front piece; 70, magnet; 71, magnetic bowl; 80, rear shell; 81, air flow cavity; 82, blade; 91, first welding piece; 92, second welding piece. DETAILED DESCRIPTION

[0026] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0027] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. During actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0028] The design of conventional tweeters is often limited by the frequency range, making it difficult to reach higher frequencies, resulting in partial loss of audio signals, affecting the restoration and clarity of sound quality. Traditionally designed tweeters have the problem of insufficient airiness and aura in high-frequency sounds. This results in the sound texture being not rich enough, lacking a sense of three-dimensionality and space, affecting the realism and immersion of the audio. At the same time, the mutual reflection and interference of sound waves in the inner cavity of the sound membrane may cause turbulence, standing waves, and instability of the frequency response curve. This will further affect the radiation and propagation of sound waves, resulting in distortion and unevenness of the sound, affecting the quality and accuracy of the sound.

[0029] In addition, the problem of poor treble directivity and narrow radiation will also lead to poor directivity and narrow radiation characteristics of the tweeter. Poor directivity will lead to uneven sound distribution, while narrow radiation characteristics will limit the sound coverage and listening experience.

[0030] The above problems combined will lead to poor sound quality and performance degradation of the speaker. The unevenness of the sound, distortion and instability of the frequency response curve will affect the overall sound performance, making the speaker's performance not reach the best state.

[0031] like Figure 1 As shown, the utility model provides a loudspeaker, including a sound generating unit and a sound amplifying structure 10 .

[0032] The sound unit is used to emit sound waves in front of it. The front of the sound unit refers to the direction in which it emits sound waves, which can also be considered as the direction of the speaker.

[0033] like Figure 3 As shown, the sound unit includes a sound film 20, a damping block 30, a voice coil 40, a bracket 50, a front piece 60, a magnetic steel 70, a magnetic bowl 71, a first welding piece 91 and a second welding piece 92, wherein:

[0034] Diaphragm 20: Diaphragm 20 is the vibrating part of the speaker, usually made of soft but elastic material, such as polyester film or polyethylene film. When the voice coil 40 is activated by current, it generates a magnetic field, which in turn interacts with the magnet 70 to make the diaphragm 20 vibrate, thereby generating sound.

[0035] Damping block 30: The damping block 30 is usually located between the diaphragm 20 and the bracket 50, and is used to control the vibration of the diaphragm 20 so that it can produce more accurate and clear sound. The material and shape of the damping block 30 can affect the frequency response and sound quality characteristics of the sound.

[0036] Voice coil 40: Voice coil 40 is a part that generates a magnetic field when current passes through it, and is usually a ring structure consisting of a wire wound on an insulating coil. When current passes through voice coil 40, it interacts with the magnetic field between magnetic steel 70, thereby generating force to drive the diaphragm 20 to vibrate.

[0037] Bracket 50: Bracket 50 is a frame structure for supporting and fixing the sound membrane 20, the voice coil 40 and other components. It is usually made of a strong material to ensure the stability and reliability of the speaker assembly.

[0038] Front piece 60: The front piece 60 is the front covering plate of the speaker, which is usually located between the diaphragm 20 and the external environment. Its design can affect the way the sound is scattered and propagated, as well as the appearance and protection function of the speaker.

[0039] Magnet 70: Magnet 70 is one of the core components of the speaker, generating a magnetic field to interact with the current in the voice coil 40 to drive the diaphragm 20 to vibrate. Magnet 70 is usually composed of a permanent magnet or an electromagnetic coil, and its strength and design have an important impact on the performance of the speaker.

[0040] Magnetic bowl 71: Magnetic bowl 71 is a component for concentrating and guiding the magnetic field, and is usually located around the magnetic steel 70. Its design can enhance the effect of the magnetic field and improve the sensitivity and efficiency of the speaker.

[0041] The first soldering pad 91 and the second soldering pad 92: The soldering pad is a metal pad used to connect the electronic components of the speaker (such as the voice coil 40) and the external circuit (such as the audio amplifier).

[0042] The sound amplification structure 10 is located at the front side of the sound-emitting unit, and the sound amplification structure 10 includes a reflection panel 11 for reflecting the sound waves, and the surface of the reflection panel 11 is parallel to the axial direction and radial direction of the speaker. The design of the reflection panel 11 is parallel to the axial direction and radial direction of the speaker, which means that the surface of the reflection panel 11 is parallel to the vibration direction of the speaker, which can more effectively reflect the sound waves and make the sound more evenly distributed in the space. This design helps to improve the clarity and coverage of the sound, making it suitable for a wider range of listeners and environments.

[0043] In a specific embodiment of the present invention, the reflective panel 11 is provided in plurality. Figure 4 As shown, by providing multiple reflective panels 11, the sound can be reflected in more directions, thereby achieving a wider sound coverage range. The size, shape and angle of each reflective panel 11 can be adjusted as needed to achieve precise adjustment of the sound. Figure 4 The line with an arrow in the middle is the direction of sound wave propagation.

[0044] like Figure 1 , 2As shown, a plurality of the reflective panels 11 are evenly spaced around the axis of the speaker. By evenly arranging a plurality of reflective panels 11, it is possible to ensure that the sound is evenly distributed and reflected in the horizontal and vertical directions. Such a design can cover the entire space with sound and provide a wider range of auditory coverage. The evenly spaced arrangement of the reflective panels 11 can reduce the dead angles of sound and areas of insufficient reflection. Each reflective panel 11 helps to reflect the sound in different directions, ensuring that clear sound can be heard in the entire audience area. The evenly spaced reflective panels 11 help to maintain the consistency and balance of the sound. No matter where the audience is located in the sound reinforcement structure 10, they can get a similar sound experience and avoid uneven sound strength or distortion. This arrangement can promote the optimization of the spatial sound field and make the sound more evenly distributed and diffused throughout the space. By evenly arranging the reflective panels 11, the sound can also be focused or enhanced in a specific area, thereby meeting the needs of sound focusing in a specific place.

[0045] like Figure 1 , 2 As shown, the sound amplification structure 10 includes an outer ring frame 12 and an inner ring frame 13 coaxially arranged with the speaker, and the outer ring frame 12 and the inner ring frame 13 are respectively connected to the two end edges of each of the reflective panels 11. The outer ring frame 12 is connected to the bracket 50. The outer ring frame is used to fix and support the reflective panel of the sound amplification structure 10 and is connected to the edge of the reflective panel. The inner ring frame is similar to the outer ring frame, providing support and structural stability.

[0046] like Figure 2 As shown, the inner ring frame 13 and the outer ring frame 12 are staggered in the axial direction of the speaker, and the inner ring frame 13 is located in front of the outer ring frame 12. Since the sound membrane 20 of the sound unit has a variety of shapes, some of the sound membranes 20 are convex structures, or the middle part of some of the sound membranes 20 is provided with a convex dust cap, the inner ring frame 13 arranged in such a staggered manner can avoid some parts of the sound unit, thereby ensuring that these parts will not be interfered with by the inner ring frame 13. This helps to ensure the normal operation and performance stability of the speaker. In addition, this staggered arrangement can make the speaker structure more compact, because it allows the internal parts of the speaker to be arranged more closely together, thereby effectively utilizing the space. Through the staggered arrangement, the waste of space between the inner ring frame 13 and the outer ring frame 12 can be avoided, providing more installation space for other parts.

[0047] like Figure 2As shown, the end of the front end plate edge of the reflective panel 11 close to the axis of the speaker is located in front of the end thereof away from the axis of the speaker. That is, the front end plate of the reflective panel 11 is arranged in an inclined shape. Since the shape of the plate edge of the reflective panel 11 is inclined, the time and manner of the sound wave reflection on the panel are affected. This design can create different sound wave propagation paths in space, forming a more complex and diverse sound field. Sound waves at one end away from the axis can break away from the reflective panel 11 earlier. This means that the sound waves can diffuse earlier after entering the space, thereby spreading more widely. This design helps the sound to diffuse more effectively in the peripheral area, thereby achieving a wider sound coverage.

[0048] like Figure 2 As shown, the front edge of the reflective panel 11 is an arc-shaped edge. By designing arc-shaped edges with different radii and curvatures, the diffusion angle of the sound can be controlled. In this way, the distribution range of the sound can be adjusted according to the specific site requirements, so that it can better adapt to spaces of different sizes and shapes.

[0049] like Figure 2 As shown, it also includes a rear shell 80, which is located at the rear side of the sound-emitting unit. An airflow cavity 81 is provided in the rear shell 80, and the airflow cavity 81 is used to diffuse the airflow and sound waves generated by the vibration of the sound-emitting unit. The airflow cavity 81 can effectively absorb the interference of sound waves. This can improve the clarity and stability of the sound, reduce the distortion and deformation of the sound, and improve the restoration and accuracy of the audio. In the sound system, turbulence may generate additional noise and interference, affecting the clarity and stability of the sound. By providing the airflow cavity 81, the flow pattern of the airflow can be controlled, and the occurrence of turbulence can be reduced, thereby improving the quality and stability of the sound.

[0050] like Figure 2 As shown, a plurality of blades 82 are arranged in the airflow cavity 81, and the plurality of blades 82 are evenly spaced around the axis of the speaker. The blade surface of the blade 82 is roughly parallel to the axial direction of the speaker. The presence of the blade 82 can effectively divide the airflow and sound waves generated by the vibration to prevent them from interfering with each other. This helps to reduce the interaction between sound waves and reduce the degree of sound distortion, thereby improving the clarity and accuracy of the audio. By arranging the blades 82 at even intervals, the propagation path and characteristics of the airflow in the airflow cavity 81 can be optimized. This helps to adjust the propagation direction and speed of the sound and further improve the stability and quality of the sound. The presence of the blade 82 can help reduce the turbulence effect in the airflow cavity 81 and further optimize the performance of the sound system. By optimizing the flow pattern of the airflow, additional noise and interference can be reduced and the clarity and stability of the sound can be improved.

[0051] like Figure 2As shown, the blade 82 gradually approaches the sound-generating unit from the end away from the axis of the speaker to the end close to the axis of the speaker. When the speaker makes a sound, the closer it is to the axis of the speaker, the stronger its amplitude and the louder the sound. Therefore, the closer it is to the axis of the speaker, the greater the airflow generated. Setting the blade 82 close to the axis of the speaker closer to the sound-generating unit can make the airflow generated near the axis of the speaker contact with the blade 82 earlier, that is, the stronger airflow is diffused through the blade 82 earlier, which can better weaken the stronger airflow and reduce the occurrence of turbulence.

[0052] like Figure 3 As shown, the blade 82 is a spiral blade. The design of the spiral blade can better guide the airflow and make it flow along a spiral path. Such airflow control can more effectively divide and diffuse the airflow generated by vibration, reduce interference and turbulence effects, and improve the clarity and stability of the sound.

[0053] The utility model also includes a vehicle, comprising the loudspeaker as described above.

[0054] In summary, the utility model proposes a speaker and a vehicle, which are additionally provided with a sound amplification structure 10 capable of reflecting sound waves, so as to expand the propagation range and coverage area of ​​the sound. Through this design, the directivity and distribution uniformity of the sound can be improved, and the coverage range of the audio inside the vehicle can be increased, thereby improving the listening experience. The airflow cavity 81 in the design can effectively absorb the interference of sound waves, solving problems such as standing waves and turbulence. This can improve the clarity and stability of the sound, reduce the distortion and deformation of the sound, and improve the restoration and accuracy of the audio.

[0055] The high-frequency cutoff frequency in this application can reach 40 kHz or more, and reaching such a high-frequency cutoff frequency means that the speaker can more accurately restore the high-frequency audio signal, improving the resolution and clarity of the audio. This helps to present the details of music and sound effects more realistically, allowing the audience to feel the subtle differences in the audio more clearly.

[0056] like Figure 5 As shown, in the high frequency band of 2kHz-40kHz of the speaker in the present application, the frequency response difference in the off-axis direction is smaller than that in the axial direction.

[0057] like Figure 6 As shown, in the 2kHz-40kHz high frequency band of the loudspeaker in the prior art, the frequency response difference in the off-axis direction is larger than that in the axial direction.

[0058] Figure 5 , 6In the figure, line A is the sound pressure curve when it deviates from the axis by 0 degrees, line B is the sound pressure curve when it deviates from the axis by 15 degrees, line C is the sound pressure curve when it deviates from the axis by 30 degrees, line D is the sound pressure curve when it deviates from the axis by 45 degrees, and line E is the sound pressure curve when it deviates from the axis by 60 degrees.

[0059] The difference between the directional sound pressure level and the axial value (dB) of the treble in this application and the difference between the directional sound pressure level and the axial value (dB) of the treble in the prior art are compared as follows (average sound pressure level of 2kHz-40kHz):

[0060]

[0061]

[0062] Obviously, due to the design of the sound amplification structure and the arrangement of the reflective panels, the solution in this application can effectively diffuse and reflect the sound in different directions, thereby enhancing the coverage and propagation effect of the sound. Thus, it is possible to ensure high-pitched sound pressure at a large angle position and ensure a wider propagation range of the sound.

[0063] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

[0064] In the description herein, many specific details, such as examples of components and / or methods, are provided to provide a complete understanding of the embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention may be practiced without one or more specific details or by other devices, systems, components, methods, components, materials, parts, etc. In other cases, well-known structures, materials, or operations are not specifically shown or described in detail to avoid obscuring aspects of the embodiments of the present invention.

[0065] References throughout the specification to "one embodiment," "an embodiment," or "a specific embodiment" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment is included in at least one embodiment of the present invention, and not necessarily in all embodiments. Thus, various appearances of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout the specification do not necessarily refer to the same embodiment. In addition, the particular features, structures, or characteristics of any specific embodiment of the present invention may be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the present invention described and illustrated herein may be based on the teachings herein and will be considered part of the spirit and scope of the present invention.

[0066] It should also be understood that one or more of the elements shown in the figures may also be implemented in a more separate or more integrated manner, or even removed because they are inoperable in certain circumstances or provided because they may be useful depending on the application.

[0067] In addition, unless otherwise explicitly indicated, any marking arrows in the drawings should be regarded as exemplary only and not limiting. In addition, unless otherwise indicated, the term "or" used herein is generally intended to mean "and / or". In the case where the term is not clear because it is anticipated that the ability to separate or combine is provided, the combination of components or steps will also be regarded as indicated.

[0068] As used in the description herein and throughout the claims that follow, "a", "an", and "the" include plural references unless otherwise indicated. Likewise, as used in the description herein and throughout the claims that follow, the meaning of "in" includes "in" and "on" unless otherwise indicated.

[0069] The above description of the illustrated embodiments of the present invention (including that described in the Abstract of the Specification) is not intended to be an exhaustive list or to limit the present invention to the precise form disclosed herein. Although specific embodiments of the present invention and examples of the present invention are described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the present invention as will be recognized and understood by those skilled in the art. As noted, these modifications may be made to the present invention in accordance with the above description of the embodiments described in the present invention, and these modifications will be within the spirit and scope of the present invention.

[0070] Systems and methods have been generally described herein as details that are helpful for understanding the present invention. In addition, various specific details have been given to provide an overall understanding of the embodiments of the present invention. However, those skilled in the relevant art will recognize that the embodiments of the present invention can be practiced without one or more specific details, or practiced using other devices, systems, accessories, methods, components, materials, parts, etc. In other cases, well-known structures, materials, and / or operations are not specifically shown or described in detail to avoid confusion with various aspects of the embodiments of the present invention.

[0071] Thus, although the present invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the above disclosure, and it should be understood that in some cases, some features of the present invention will be adopted without corresponding use of other features without departing from the scope and spirit of the proposed utility model. Therefore, many modifications can be made to adapt specific environments or materials to the essential scope and spirit of the present utility model. The present utility model is not intended to be limited to the specific terms used in the claims below and / or the specific embodiments disclosed as the best mode for carrying out the present utility model, but the present utility model will include any and all embodiments and equivalents falling within the scope of the appended claims. Therefore, the scope of the present utility model will be determined solely by the appended claims.

Claims

1. A loudspeaker, characterized in that: include: A sound-generating unit, used for emitting sound waves in front of it; The sound amplification structure is located in front of the sound-emitting unit, and the sound amplification structure includes a reflection panel for reflecting the sound waves, and the surface of the reflection panel is parallel to the axial direction and radial direction of the speaker.

2. The loudspeaker according to claim 1, characterized in that A plurality of the reflection panels are provided, and the plurality of reflection panels are evenly spaced around the axis of the speaker.

3. The loudspeaker according to claim 2, characterized in that The sound amplification structure comprises an outer ring frame and an inner ring frame which are coaxially arranged with the loudspeaker, and the outer ring frame and the inner ring frame are respectively connected to the two end plate edges of each of the reflection panels.

4. The loudspeaker according to claim 3, characterized in that The inner ring frame and the outer ring frame are staggered in the axial direction of the speaker, and the inner ring frame is located in front of the outer ring frame.

5. The loudspeaker according to claim 1, characterized in that An end of the front end edge of the reflective panel close to the axis of the speaker is located in front of an end thereof far from the axis of the speaker, and the front end edge of the reflective panel is an arc-shaped edge.

6. The loudspeaker according to claim 1, characterized in that It also includes a rear shell, which is located at the rear side of the sound-emitting unit. An airflow cavity is arranged in the rear shell, and the airflow cavity is used to diffuse the airflow and sound waves generated by the vibration of the sound-emitting unit.

7. The loudspeaker according to claim 6, characterized in that A plurality of blades are arranged in the airflow cavity, and the plurality of blades are evenly spaced around the axis of the speaker.

8. The loudspeaker according to claim 7, characterized in that The blade gradually approaches the sound generating unit from an end away from the axis of the speaker to an end close to the axis of the speaker.

9. The loudspeaker according to claim 7, characterized in that The blades are spiral blades.

10. A vehicle, characterized in that: Comprising a speaker as described in any one of claims 1-9.

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