SE527940C2 - Loudspeaker system has membrane movement of which produces sound waves which go into the loudspeaker cabinet and then out into a room - Google Patents

Abstract

The sound which enters the cabinet is loaded acoustically by formations within the cabinet (2) and by different parts, such as the loudspeaker magnets (3), loudspeaker basket (4), loudspeaker filter, rigidity stay. Where stays are used of different dimensions (6), the loudspeaker magnets are so formed that they are the required acoustic shape (7,8,12). Where the acoustic loading of the loudspeaker is weak, a reduction of the acoustic load in a specific frequency range by the installation of one or more form components (11) strengthens the acoustic weakness so that an even load is achieved.

Description

527 940 2. speakers and speaker systems, The technology the invention is based on The invention is based on the technology on which the speakers are based, described in the literature by, among others: L. L. Bernaek, H. F. Olson, E. M. Villchur, R. H. Snmll.

What is achieved with the invention Conventionally constructed loudspeakers according to the principle of membranes inserted in a cabinet or the like contribute through their construction with sound changes to the original sounds they are intended to reproduce, much of these sound changes are caused by repercussions from the sound waves directed into the cabinet.

This is the big problem with speaker reproduction that all self-acting speaker manufacturers are trying to remedy.

To be able to create with their speakers a sound that is experienced in the same way as a concert hall, jazz club, natural surroundings, etc.

This is difficult to do when it comes to a number of factors. What is achieved with the invention is that the various parts and details of the interior can be shaped so that they have an effect on the acoustic load of the membrane as the designer wishes.

.Present: invention how different forms affect the acoustic: load ° n1g6n, »G0 fl0 m att. Using the principles and descriptions of the design, a designer can now design, for example, speaker elements so that it constitutes an even acoustic load in the frequency ranges that its parts affect. In addition, the designer can use additional additions, reshaping details that change the shape of the details that can be difficult to provide in terms of manufacturing acoustically suitable design, such as. speaker magnets.

In addition, the designer can use special details that are only for and designed to fill in gaps or other irregularities in the acoustic load curve. By applying this patent and these design principles, the designer can now give the speaker system a very even acoustic load over the entire frequency range, which gives the sound generated from the speakers a uniform frequency and a smooth transient curve. This means a lot for the sound quality and for how the sound is experienced to listen to, and provides cleaner and more original sound, a more high-quality, distortion-clear, easy-to-listen and more enjoyable sound. .

Means used in the invention.

The means used in the invention are the internal structure and design of the cabinet (10), one or two motion damping elements, - ~ elements (ll), the structure and design of the internal details in the cabinet (eg loudspeaker-limiter), elements which reshape, e.g. shaped details or surfaces inside the cabinet (7) as well as the present tlpp fi nníng Spin how different shapes affect the acoustic load of the speaker diaphragm. All means are used so that the repercussions of the sound waves fi- on the diaphragm should interfere as little as possible with the ability to reproduce the original sound input to the speaker system. All methods can be used together or separately.

Explanation of the invention In conventionally constructed loudspeakers, the structure of the cabinet and _ _ the shapes of details inside the cabinet give rise to uneven acoustic loads r _ _ the hook telephones here vens sequence. To avoid or compensate for this, damping objects (11) are used in the applications of the system, which are adjusted in size and shape so that the loudspeaker system receives an even acoustic load on the diaphragm (9) over its entire frequency range. These objects can consist of the speaker element which is designed so that it contributes to or provides the desired acoustic load for the speaker system (by speaker system and speakers. They can also consist of mold elements (7) which reshape inappropriately designed constituent parts, as well as of mold elements (11) which are merely designed to shape the acoustic load.

The design uses the invention that this patent intends to protect: - That each shape with a specific location in a specific speaker interior affects the load of the speaker diaphragm's movements, in fi- equation sections that directly correspond to the given form and its dimensions. (fi g. 2, fi g. 3.) The figures show how a shape uniform dimension constitutes a strong attenuation within a narrow band sequence band (fi g. 2) while a shape with varying dimension (fi g. 3) constitutes a weaker attenuation within a wider fi sequence band than the previous form fillet constitutes fl undpm fi liïelïwm depending on the designer's experience and knowledge of sound can be used in many ways for fi nat, advanced and effective way.

These mold elements can, for example, be made of plastic, many different materials can be used. The shape and arrangement of these objects can be varied and combined in many different ways, so that the sound or expedient end result in terms of sound reproduction in all different applications is obtained.

It is also possible to use the gain to control the load so that it becomes larger in certain sequence sections or so that it increases or decreases in a desired manner (11) and (fi g. 3). This is done by using coarser shapes that most affect lower fi-sequences where higher acoustic load is desired in the lower sequences and narrower shapes that most affect higher fi-sequences, where higher load in the higher frequencies is desired.

All this control assistance of the measurements exactly after the minimum or dimensional change changes the attenuation with respect to strength and position in the sequence curve.

This attenuation can be considered as part of the total Q-value where the variation of the strength of this Q-value over the whole frequency range is described by a fi-sequence curve.

Minbenmmingpaaenmderev Q-vafderafQe fi errefbenamningenpaaermperem.

This load has previously had an arbitrary because, for example, the speaker element has been manufactured with an arbitrary shape seen from an acoustic load perspective. This means that the character of the sound is formed in an arbitrary way or how the part of the loudspeaker element that resides inside the loudspeaker box acoustically happens to be because the design has been taken from the manufacturing and It is relatively small forces but fully sufficient to 527 940 make the difference between a bad, foul-sounding speaker and a good, fantastically well-sounding and by anyone who appreciates well-priced speakers.

Which constituent elements and shapes are chosen to design according to this patent are determined for each individual application and are selected so that the desired result is obtained.

This method can be used on all types of sound reproduction systems in a wide variety of variants and embodiments.

Preferred Embodiment Figure 1 shows an example of how the present invention can be applied to a conventional loudspeaker system with a dynamic loudspeaker. Of course, a wide variety of modes of expression and variations can be made on this application as well as on all other applications of the invention.

The movement of the diaphragm produces sound waves that go out into the room (1) as the sound that is listened to and also sound waves that go into the cabinet (2). The sound that enters the cabinet is acoustically disturbed by the design inside the cabinet, by the included details and by the various parts of the components included such as speaker magnets (3), speaker basket (4) and by other design of the speaker element, dividers, dry stiffeners etc. When applying the device, the shapes inside the cabinet are designed so that together they form a uniform, uniform acoustic load on the loudspeaker diaphragm.

This avoids, for example, evenly coarse shapes which are instead given shapes with varying dimensions (5). When st your struts or the like are used, the dimensions which differ from each other (6) are given, unless a particularly high load is desired in the sequence section which the struts affect. When details that are difficult or expensive to give a color shape, such as speaker magnets, they are reshaped by adding extra shape elements and converting them to the desired acoustic shape. (7, 8 and 12) When the acoustic load of the membrane in a loudspeaker system shows a slump, a dry reduction of the acoustic load in a certain sequence sequence, one or more of the form elements (11) are installed which fill the gap acoustically so that an even load is obtained.

If the designer wants a higher acoustic load of hay in a certain sequence section or a certain load profile in a certain sequence section, one or more details inside the cabinet are designed so that they acoustically correspond to this load or load profile.

The partial solutions required for the independent implementation of this invention can be used separately, separately.

The invention has been generally described on a bass / midrange speaker. This is to technically explain the invention. The design of the other applications of the invention can of course be carried out in a variety of different ways on all other types of loudspeaker elements and loudspeaker system, e.g. kan fl era. speaker element included in the same The invention can also be applied to headphones, Öfmls fl åßk fl f and more.

Claims (5)

1. 527940 5 Claim 1. Förhögtalare according principle membrane or annantyp of sand al rel al MSS FL I (9) ch flfi Fseai 1 knbinnfq Io) _ _ ~ kannninnknnanvnlENcvLmnnninnninngtnlnnnnnnmnnnvlämndlßm flfl f- flfl LEFT al dsßfm influence the acoustic loading of hay 1 a popping, _ '_ nnkvennbnnn nnnn is lngfn in nnlwnnn jn nian- e ainnnnlen cylinder nn and bnlnçmmsen-bhr right-The longer the cylinder is (fi g. 2) while a cylindrical conform tttgörlenmiltdrß whole-timing over a wider frequency section (fi g. 3) where the part of the cone that has the largest dimension affects 158136 fi equidistant while it the part of the cone which is narrower affects higher fi elivßllselë other * W ffifmer is dimensioned and deformed accordingly so that the designer increases the load 1 a lower fi sequence section by increasing the dimensions and ide higher frequencies 86110111 to make Gif part of the shape in smaller dimension, a orange slice can serve as an illustration of a shape such as 810116 dimension in the middle and where the dimension decreases towards the ends In this way, the details of the speaker in accordance with this patent are given shapes that provide the sound character that the designer desires. 'Patent claims For speakers according to claim 1 according to the principle diaphragm 61101 '811m !! The CYP of transmitter elements (9) includes a housing (10) characterized by THE WATER FORMS OF THE SPEAKER ARE DESIGNED ACCORDING TO THE PRmcRPEN now the shape of a given speaker interior affects the acoustic load on the moving membrane of the speaker. with a strength and within vens sequence sections that directly correspond to the shape, its dimensions and its _ plnnnfing inside lnögtnlnnknbinnnnl, at fi lnlnpnlng nv ltpp fi nningen the kvnslfuktören goes out of a wall with a definite location and changes its shape and dimensions until it forms a desired on to the next detail. The patent claim can be used separately or in combination with one or several others »- Patent claim For loudspeakers according to patent lcav 1 and 2 according to the principle diaphragm or other type of transmitter element (9) enclosed in cabinet (10) Characteristic of the INCOMING ELEMENT SOMTEX. SPEAKER ELEMENTS, DIVISION FILETS, STIFFING BRACKETS ETC. DESIGNED so that the acoustic load which together with the whole system constitutes an appropriate or desirable acoustic load applies over its entire frequency range, in accordance with the descriptions and other claims, the designer here listens to the result he desires or uses measurement methods. The patent claim can be used separately or together with one or your other patent claims For loudspeakers according to claims 1, 2 and 3 according to the principle melnbran or other type of transmitter element (9) inside the attic cabinet fl 10) designed according to the descriptions and other claims sold increases the acoustic attenuation in these fi- 'sequence sections as the designer desires. The patent claim can be used separately or in conjunction with this or other patent claims. For loudspeakers according to claims 1, 2, 3 and 4 according to the principle diaphragm or other type of 527 940 island transmitter element (9) including enclosure (10) Characterized by ELEMENTS, l2) inside the cabinet (l In accordance with the other claims and descriptions, they cooperate in implementing or optimizing the function for each application so that a desired acoustic attenuation is obtained. with one or fl your other patent claims.