WO2021013306A1

WO2021013306A1 - Electrodynamic loudspeaker set

Info

Publication number: WO2021013306A1
Application number: PCT/DE2020/100645
Authority: WO
Inventors: Karsten BUSS
Original assignee: Buss Karsten
Priority date: 2019-07-25
Filing date: 2020-07-22
Publication date: 2021-01-28
Also published as: DE102019120138B3

Abstract

The invention relates to an electrodynamic loudspeaker set, which consists of – at least one bass loudspeaker (1) and – at least two satellite loudspeakers (2), wherein – each loudspeaker is accommodated in a housing, has at least one magnet each with an oscillation coil arranged axially moveably therein, a membrane and a loudspeaker cage. According to the invention – the housing of the bass loudspeaker (1) is provided with at least one fork (4) lying on the top face of the housing, the two tines (6) of which extend along the side faces of the housing and the stem (5) of which is formed as a loop. - Apart from the standing face and the front side, all faces of the housing of the at least two satellite loudspeakers (2) are provided with a flat elongate shaped element, hereinafter called a leaf-like shaped element (9), each leaf-like shaped element (9) having convexly rounded or convexly and concavely rounded long sides that are joined at at least one long end to form a point.

Description

Electrodynamic speaker set

State of the art

The invention is based on an electrodynamic loudspeaker set, consisting of at least one bass loudspeaker and at least two satellite loudspeakers, according to the preamble of claim 1, which is mainly used as an additional device for qualified sound reproduction from TV sets, laptops or PC's is used.

Electrodynamic loudspeakers convert electrical signals into analog sound waves. They are known in a wide variety of designs, performances and a wide variety of applications and are available in small spatial designs in headphones, in medium-sized designs in vehicles, home hi-fi systems and in correspondingly large designs in large loudspeakers in high-performance acoustic systems built-in.

Regardless of its size and technical quality, the basic principle of any loudspeaker is to convert the electrical signal received from an amplifier into sound waves.

In order to come as close as possible to the original sound of the sound event when reproducing sound events via electroacoustic loudspeakers, the electronics industry has developed powerful, highly sensitive loudspeakers, the quality of which is also reflected in exorbitantly high prices. And yet stereophony and quadrophony with loudspeakers is always just an image of what constitutes the original sound event. The sound experience of a hi-fi stereo system, no matter how expensive, in which very high-quality and thus also cost-intensive sound sources, for example a very high-quality turntable or CD player in connection with an amplifier, are used for a sound experience that comes closer to the original sound, will still differ significantly from the natural, original sound experience with conventional loudspeakers. The same applies to the connection cables between the devices.

The inventor and applicant of the loudspeaker arrangement as a wave field generator like. DE 10 201 1 1 15 A1 describes the problem just described and its causes very clearly in the presentation of the prior art for its invention. In his opinion, an acoustic transducer in the form of a loudspeaker is not able to “convert the electrical image of the sound supplied to it into equivalent sound waves within the human auditory spectrum” (DE 10 201 1 1 15 A1, Paragraph 0008). He then analyzes the reasons for the incorrect reproduction of the received sound signals by electrodynamic loudspeakers and comes to the conclusion that, with the help of the generation of the natural pattern formation of the sound wave field, sound patterns that also correspond to the human brain pattern can be perceived as real by the listener A wave field generator consisting of interference resonators is proposed as a technical implementation.

The disadvantage of such a wave field generator consists in the extremely high technical complexity that the construction of such a generator requires. In addition, a technical implementation has not yet become known.

A loudspeaker module is also known in which both a bass loudspeaker, a so-called subwoofer, and mid-range and high-frequency loudspeakers are integrated in a single housing. In order to achieve a full range of sound, the housing consists of a hollow, spherical middle part with a central cavity and has a plurality of wings which are spaced parallel to one another and which protrude from the housing. Each of the wings has a cavity which is in operative connection with the central cavity of the middle part (US 2016/0 134 964 A1). To improve the electroacoustic conversion of stereo signals, a loudspeaker system is known which consists of a bass housing each with an input for a left and a right stereo signal and several satellite loudspeakers for upper frequencies. The input signals for the satellite loudspeakers in the upper frequency range are also supplied by the bass housing (DE 196 20 010 B4).

The invention is based on the object of providing a loudspeaker set which, even without the use of high-quality, cost-intensive sound sources, has a significantly higher quality in the reproduction and reproduction of the original sound of a sound event, regardless of whether it is a single human voice, a choir, the sound of a solo instrument, an instrument group or an orchestra, so that they offer the listener a natural sound experience that is much closer to the original sound.

According to the invention, the object is achieved by the characterizing features of claim 1.

The invention and its advantages

The explanation of the invention and its advantages must be preceded by the fact that the inventor has long been concerned with the phenomenon of the connection of shape and form with tones and sounds, to which Ernst Florens Friedrich Chladni (1756 - 1827) first published in 1787 “ Discoveries on the Theory of Sound ”. In this publication he presented the results of his systematic investigations and experiments on the shaping and creative powers of tones and sounds, which he gained from a relatively simple experiment: a thin plate sprinkled with fine sand is painted on one side with a violin bow . After a while you hear a sound and see how the plate and the sand start to move. If this is done with a certain skill, the sand arranges itself into a filigree pattern, which is now called “Chladnian sound figures”. Years later, this phenomenon was taken up and further developed by the physicist Michael Faraday (1791 - 1867). Instead of sand, he preferred to use very fine, light powder and came to the surprising result that not only the plate is responsible for the creation of the forms, ie the sound figures, but also the air surrounding the powder. The sound also causes the air to vibrate, i.e. rhythmic movement. Although numerous scientific publications on these experiments have been made and are still being made, the phenomenon has not yet been conclusively clarified. However, it impressively shows the connection, in other words the context, of tone, sound and shapes. As examples of current scientific publications, three references may be mentioned here: SIAM REVIEW, Vol. 54, No. 3, pp 573-596, “Chladni Figures and the Tacoma Bridge: Movitating PDE Eigenvalue Problems via Vibrating Plates”, 2012 Society for Industrial and Applied Mathematics, see http://www.siam.org/jour- nals / ojsa.php ; "Selected for a Viewpoint in Physics", Physical Review Leiters, PRL 1 16, 184501 (2016); "Resolving the formation of modern Chladni figures", EPL, 1 1 1 (2015) 64004, (doi: 10.1209 / 0295- 5075/1 1 1/64004), www epljournal.org.

The invention described below is an exploitation of this principle, i. H. the influencing of tone and / or sound through basic shapes based on Chladnian sound figures or, to put it another way, taken from the treasure trove of Chladnian sound figures, and with the inventive design and attachment to the bass loudspeaker and the two satellite loudspeakers It has been proven that speakers influence the sound radiation of the loudspeaker, i.e. produce a technical effect.

As has been shown in practical experiments with the treasure trove of forms of the Chladnian sound figures, it is possible to arrange very specific, predominantly flat forms, that is, in the plane, on the bass loudspeaker and the two satellites - Loudspeakers from conventional loudspeaker sets, which significantly improve their sound. The overall sound perceived from the bass loudspeaker and the left and / or right loudspeaker reproduces the original tone or sound of the spoken word of the human voice, a choir, an instrument, an instrument group or an orchestra so faithfully that the listener gets the impression has to hear the tone or sound directly from the original source, such as in a live event or concert. Even the position of the listener in relation to the arrangement of the loudspeaker set has no significant influence. This exceptionally good sound experience is achieved by means of the loudspeakers of the loudspeaker set equipped according to the invention, even with simple sound sources such as a mobile radio device, an MP3 player, a tablet or a PC. A further increase in music enjoyment through a high-quality sound source is of course possible, but not a prerequisite.

According to the invention, the housing of the bass loudspeaker is provided with at least one fork resting on the top surface of the housing, the two prongs of which extend along the side surfaces of the housing and the stem of which is designed as a loop. On the two side surfaces, the top surface and the rear of the satellite loudspeakers, at least one flat elongated shaped element, hereinafter referred to as a sheet-shaped shaped element, is arranged. Each leaf-shaped shaped element has convexly rounded or convex and concavely rounded longitudinal sides which are brought together at least one longitudinal end to form a point.

Both the basic contours that form the fork and the leaf-shaped form elements are taken from the treasure trove of Chladnian sound figures. Convex and concave arcs can be seen as the basic contours, which form the leaf-shaped form elements either on their own or in a row. In the fork, the leaf-shaped shaped element can be seen in its handle itself as well as in the loop formed by the handle, an advantageous embodiment of the invention being that the loop of the handle of the fork widens upwards and that is encased by the loop The inner surface tapers towards the prongs of the fork. In a further advantageous embodiment of the fork, the transition from the prongs of the fork to its handle tapers.

According to another advantageous embodiment of the invention, a large leaf-shaped shaped element is arranged on the side surfaces of the satellite loudspeakers, which ends at the top and bottom. In a likewise advantageous embodiment of the invention, a small, leaf-shaped molded element with a convex and an opposite concave longitudinal side is arranged in the horizontal direction on the top surface of each satellite loudspeaker.

According to an additional advantageous embodiment of the invention, in the lower area of the rear side of each satellite loudspeaker, two small leaf-shaped form elements are arranged next to one another with a convex and an opposite concave longitudinal side with their tips pointing downwards.

It goes without saying that the sound-enhancing add-on elements, in the present invention the fork and / or the leaf-shaped shaped elements, must consist of a sound-enhancing material with good sound and / or resonance properties, of which wood is certainly one of the most suitable Materials should be. But also other natural materials, such as B. horn or shell appear suitable for this purpose. However, it is also conceivable to produce the shaped elements from a metal or composite material.

Another significant improvement in the sound of the loudspeaker set is achieved in that a base is provided as the base for the satellite loudspeakers, which consists of a cover plate and a base plate, into which a recess for receiving a molded element made of a mineral material is inserted. The outer contour of this element is adapted to the inner contour of the recess. In addition, a lemniscate-shaped recess is incorporated into the underside of the cover plate, into which a lemniscate-shaped double loop of a metallic material corresponding to the shape of this recess is inserted.

In an embodiment of the invention that is advantageous in this regard, the outer surface of the base approximates the shape of a lemniscate.

To improve the stability of the satellite loudspeakers, at least one flat recess is made in the top of the cover plate of the base. Further advantages and advantageous embodiments of the invention can be found in the following description, claims and drawings.

drawing

A preferred exemplary embodiment of the subject matter according to the invention is shown in the drawings using a loudspeaker set consisting of a bass loudspeaker with two satellite loudspeakers and is explained in more detail below. Show it

Fig. 1 is an overall view of a speaker set,

2 shows a fork of the bass loudspeaker,

3 shows a three-dimensional representation of the satellite loudspeakers looking towards their side surfaces,

4 shows a three-dimensional representation of the satellite loudspeakers looking towards their rear side,

Fig. 5 shows a base for the satellite speakers and

6 shows the base from below.

Description of the exemplary embodiments

As can be seen from FIG. 1, the loudspeaker set in the present example consists of a bass loudspeaker 1 and two satellite loudspeakers 2 which stand on a pedestal 3. The front surfaces of the two satellite loudspeakers 2 face the viewer of FIG. 1. Two forks 4 spaced apart from one another are placed on the bass loudspeaker 1 and encompass the housing of the bass loudspeaker 1 on its upper side and on its two side surfaces. 2 shows such a fork 4. It consists of a handle 5 designed as a loop and two prongs 6 extending parallel to the side surfaces of the housing of the bass loudspeaker 1. The loop-shaped handle 5 encloses a leaf-shaped free space 7 with a bottom pointing tip. The prongs 6 are about a down in the direction of the Handle 5 conically tapering transition piece 8 is connected to handle 5. In the present example the fork 4 consists of wood, the grain of which runs in the longitudinal direction of the fork 4.

3 and 4 show the two satellite speakers 2 from the side and from the rear. The front surface is not visible in these representations. It can be seen that in the present example the two side surfaces, the rear side and the top surface of each satellite loudspeaker 2 are provided with at least one elongated shaped element, hereinafter referred to as leaf-shaped shaped element 9. The large, leaf-shaped shaped element 9.1 arranged on the side surfaces is lancet-like, that is, it consists of two convex arches that converge at the top and bottom in a point, and predominantly covers the side surfaces. The rear side of the satellite loudspeaker 2 is provided with two small, essentially vertically aligned, and their top surface is provided with a small, essentially horizontally aligned, sheet-shaped shaped element 9.2. These small, leaf-shaped shaped elements 9.2 only have one point in which a convex and a concave curve converge. At the opposite end of the sheet-like shaped elements 9.2, the two arches are connected to one another by a curve. This shape can also be referred to as a teardrop shape. In the present example, wood, the grain of which runs in the longitudinal direction of the shaped elements 9, was also selected as the material for the sheet-like shaped elements 9. Where two leaf-shaped wooden elements 9 are provided on a surface, different types of wood can also be used for these wooden elements 9.

5 and 6 show the base 3 on which the two satellite speakers 2 are placed for additional sound improvement. It consists of a cover plate 10 which is screwed to a base plate 11. The outer surface of the base 3 approximates the shape of a lemniscate, ie its two end faces are each designed as a convex arch, the ends of which are connected to one another via a concave constriction. The base plate 11 is provided with a recess 12 over its entire thickness, so that it virtually forms a ring. An element made of a mineral material, in the present example a stone 13, which corresponds to the dimensions of the inner contour of the recess 12, is inserted into this recess 12. In the underside of the cover plate 10 is a lemniscate-shaped groove-like A recess is incorporated into which a lemniscate-shaped double loop 14 made of a metallic material corresponding to the shape of this recess is inserted. In the present example, two flat recesses 15 in the shape of the base of the two satellite loudspeakers 2 are incorporated on the top of the cover plate, giving them a more secure stand on the base 3.

All of the features shown here can be essential to the invention both individually and in any combination with one another. In particular, it should be pointed out that the shaped elements shown here, namely the fork 4, the leaf-shaped shaped elements 9, 9.1 and 9.2 and the double loop 14 represent only a selection of the shapes encompassed by the treasure trove of chladnian sound figures.

Reference number list

1 bass speaker

2 satellite speakers

3 bases

4 fork

5 stem

6 prongs

7 Leaf-shaped space

8 Conical transition

9 Leaf-shaped form element

9.1 Large leaf-shaped form element

9.2 Small leaf-shaped form element

10 cover plate

11 base plate

12 recess

13 stone

14 double loop

15 Shallow recess

Claims

1. Electrodynamic speaker set, consisting of

- at least one bass speaker (1) and

- at least two satellite speakers (2), where

- Each loudspeaker is housed in a housing, at least one magnet, each with one axially movable therein

Having a voice coil, a diaphragm and a loudspeaker frame, characterized in that

- That the housing of the bass loudspeaker (1) is provided with at least one fork (4) resting on the top surface of the housing, the two prongs (6) of which extend along the side surfaces of the housing and the stem (5) of which is designed as a loop is and

- that apart from the standing surface and the front side, all surfaces of the housing of the at least two satellite loudspeakers (2) are provided with at least one flat elongated shaped element, hereinafter referred to as sheet-shaped shaped element (9), each sheet-shaped shaped element (9) being convexly rounded or convex and has concavely rounded longitudinal sides which are brought together at at least one longitudinal end to form a point.

2. Electrodynamic speaker set according to claim 1,

characterized in that the loop of the handle (5) of the fork (4) widens upwards and the inner surface enclosed by the loop tapers in the direction of the prongs (6) of the fork (4).

3. Electrodynamic speaker set according to claim 1 or 2,

characterized,

that the transition from the prongs (6) of the fork (4) to its handle (5) tapers.

4. Electrodynamic speaker set according to claim 1,

characterized, that a large leaf-shaped molded element (9.1) is arranged on the side surfaces of the satellite loudspeakers (2), which ends at the top and bottom.

5. Electrodynamic speaker set according to claim 1 or 4,

characterized,

that on the top surface of each satellite loudspeaker (2) a small, leaf-shaped shaped element (9.2) with a convex and an opposite concave longitudinal side is arranged in the horizontal direction.

6. Electrodynamic speaker set according to one of claims 1, 4 or 5, characterized in that

that in the lower area of the back of each satellite loudspeaker (2) two small leaf-shaped shaped elements (9.2) are arranged next to one another with a convex and an opposite concave longitudinal side, with their tips pointing downwards.

7. Electrodynamic speaker set according to one of claims 1 to 6,

characterized,

that the fork (4) and / or the leaf-shaped shaped elements (9, 9.1, 9.2) consist of natural materials, for example wood, horn, shell, or metal or a composite material.

8. Electrodynamic speaker set according to claim 1,

characterized,

that the satellite speakers (2) are on a base (3),

- which consists of a cover plate (10) and a base plate (11) with a recess (12) into which an element made of a mineral material corresponding to the dimensions of the inner contour of the recess (12) is inserted,

- A lemniscate-shaped recess being incorporated into the underside of the cover plate (10), into which a lemniscate-shaped double loop (14) made of a metallic material and corresponding to the shape of this recess is inserted.

9. Electrodynamic speaker set according to claim 8,

characterized,

that the lateral surface of the base (3) approximates the shape of a lemniscate.

10. Electrodynamic speaker set according to claim 8 or 9,

characterized,

that the top of the cover plate (10) has at least one flat recess (15) for receiving the at least two satellite speakers (2).