BG2686U1 - Sound body - Google Patents

Abstract

The sound body includes low-frequency, mid-frequency and one high-frequency bipolar speakers, mounted in specially cut openings in the corpus and passive filters of audio signals, mounted in separate boxes with terminals for plugging in the sound body to an amplifier. The boxes are constantly connected with the speakers via transmitters with a three-belt system for filtering, dividing the fed audio signal into a low-frequency, mid-frequency and high-frequency. The corpus is made of a multi-layered malleable material, as between two of the layers are built-in the transmitters, which connect the mid and high-frequency speakers with the filter. The corpus consists of a main body and a holder for the low-frequency speakers. In the lower part of the corpus, where it makes contact with the floor, are mounted two strips, which stabilize the body, and the part of the corpus which serves to mount the low-frequency speakers is made of gluing four layers preliminarily cut into the desired shape low resonance material, and it is attached to the main body, in such a way that it comprises an inseparable part of it. 3 claims, 8 figures

Description

(54) SPEAKER (57) The loudspeaker includes low-frequency, medium-frequency and one-frequency two-pole loudspeakers mounted in specially cut holes in the housing and passive filters of audio signals mounted in separate boxes with terminals for switching on the loudspeaker. The boxes are permanently connected to the speakers by wires with a three-band filtering system, dividing the supplied audio signal into low-frequency, medium-frequency and high-frequency. The housing is made of multi-layer flexible material, and between two of the layers are built the wires connecting the middle and high frequency speakers to the filter. The body consists of a main body and a holder for the subwoofer. In the lower part of the case, where it contacts the floor, two strips are installed, which stabilize the body, and the part of the case, which is used for mounting the subwoofers, is made by gluing four layers, pre-cut in the desired shape low-resonance material and she is attached to the main body so as to form an integral part of it.

claims, 8 figures

2686 UI (54) SPEAKER

Field of technology

This utility model relates to a loudspeaker and is applicable in the field of audio technology and is used to reproduce audio signals. Refers to the highest class category of audio equipment intended for use in rooms in stereo audio systems and / or as a front channel of surround ones.

BACKGROUND OF THE INVENTION

When reproducing sound by technical means, the quality of the sound emitted by the speakers is extremely important, which is why the specialists in the field of sound technology strive to create a loudspeaker, which guarantees the best possible strong frontal emission of the sound signal and minimal or even zero side and back acoustic radiation. This is because the side and rear acoustic emissions degrade the sound quality, often causing a microphone associated with the emission of unpleasant to the human ear screaming sounds.

In order to achieve the best possible quality of the reproduced sound, both the configuration of the speakers of a given loudspeaker and the materials used in it are essential.

To date, the applicant is aware of three technical solutions for overcoming the above problem, disclosed in document GB 2191065, DE 102008016703 A1 and US 4437541.

The first document GB 2191065 discloses a loudspeaker with a system of loudspeakers, which contains a housing in which are mounted multiple dipoles positioned in a line opposite each other, and to the housing above the dipole line is mounted an additional speaker with the ability to change its inclination .

The second document DE 102008016703 A1 discloses a loudspeaker comprising a subwoofer, a midrange loudspeaker and a tweeter, all of which are mounted in a special configuration to the walls of the loudspeaker and are arranged in a special configuration.

The third document US 4437541 discloses a loudspeaker formed by first and second parallel holes with holes, with your first juicer mounted in the hole of the first plate, and between the two plates there is a plate of acoustic absorbing material.

However, all three solutions have some shortcomings, which are overcome with the stated utility model.

Technical essence of the utility model

The purpose of this utility model is to provide coverage of an extremely wide bandwidth, maximum linearity of reproduction, minimization of various types of distortion and the most natural and high quality sound. All this is combined with the possibility of using them with audio amplifiers with both low and high power.

This utility model refers to a loudspeaker of the passive type, which does not contain active electronic elements and does not require additional electricity for its operation. It, through its built-in speakers (electromagnetic diffusers / transducers), reproduces the frequency oscillations transmitted to it by an amplifier of audio signals, turning them into sound waves perceived by the human ear. This is done by connecting it to the output terminals of any audio amplifier via two wires (+/-).

As an acoustic layout, the loudspeaker according to the present utility model is an open type loudspeaker, characterized by natural and detailed sound, open stage and "live" perception of the whole musical picture, avoiding all the negatives of the closed type systems.

The construction of the claimed loudspeaker is a combination of two subsystems - in the low frequency spectrum is used "Volumeless double dipole", and in the medium and high frequency - classic dipole, emitting sound waves bilaterally - forward and backward, relative to the speaker body. In this system, the emission of the front (+) and rear (-) half-waves (both 180 degrees to the dipole line) and their mutual "quenching" at points close to 0 degrees eliminates one of the main causes of distortion, namely standing waves.

The loudspeaker consists of a housing, speakers mounted in a special hole

2686 UI openings in the housing and passive filters of audio signals (crossovers), mounted in separate boxes with terminals for connecting the speaker to an audio amplifier, permanently connected to the speakers by wires. The design used a three-band filtering system, which divides the supplied audio signal into low-frequency (21 - 400 Hz), medium-frequency (400 - 4000 Hz), and high-frequency (4000 - 54 kHz).

The following speakers are used in the loudspeaker:

- Two low-frequency two-pole speakers, representing electrodynamic diffusers, mounted in a specially cut hole in the middle of the lower part of the loudspeaker housing. The two speakers are mounted opposite each other, located below 90 degrees to the body (dipole line). The construction of the volumeless double dipole is similar to the hitherto famous "Double dipole" by Linkwitz and "RiPol W Profile" by Ridtaler. The main difference from these designs is the removal of all the panels used to mount the speakers and creating semi-closed volumes to guide the front and rear half-wave. In the Volumetric Dual Dipole, each front half of the speaker is closed along its body so as to isolate the rear half-wave, which is radiated back from the body. At the rear, with the help of a hold, the two speakers close the volume to each other and thus form a front half-wave for the two, which radiate forward. Thus installed and operating in phase (Push / Pool IE!), They together emit one front and one rear half-wave and work as one emitter, but with an increased membrane area and correspondingly drastically increased acoustic energy, without harming the others. their characteristics. The use of an open-frequency low-frequency section helps to avoid the main problems with systems using volumes, namely - avoiding the presence of standing waves, avoiding the presence of "coloring" of the sound, avoiding the presence of so. "Port voice" in bass reflex systems, "box sound", etc. In this open system, the low range is characterized by a deep and clear detail, is perceived as a whole with the whole picture, sounds natural and is not as strongly positioned as in closed systems. The configuration used significantly increases the acoustic energy at low frequencies and allows the speakers to reach 34Hz at -3dB and 21Hz at -10dB (lw / lm). This in turn contributes to the linear frequency response of the products;

- Six midrange bipolar speakers, representing electrodynamic diffusers mounted (together with the tweeter) on a special plate.

The positioning of the midrange speakers on the plate and their installation are performed in a special configuration that minimizes distortions in the midrange and in the best way acoustically interacts with the tweeter mounted on the same plate. The use of six small rather than one larger speaker is tailored to the need for speed and detail in the midrange, due to the fact that only in this way can a real musical picture be achieved. In turn, the plate is mounted in a special hole in the body of the speaker, cut asymmetrically in the middle of the body itself, seen from the front (at a certain distance to the left for the speaker used for the left channel and right - for the speaker used for the right channel) . This arrangement of the plate on the body also minimizes the harmful effects of distortions in the medium and high frequency spectrum caused by the laws of physics when using open-type systems;

- A high-frequency bi-pole ribbon type speaker mounted on the above-mentioned plate, together with the six midrange speakers, in a special configuration. In the speaker used for the left channel, the tweeter is mounted on the left side of the panel. Accordingly - in OT, used for the right channel - at the right end of the plate. Their electrical connection is in reverse phase, relative to the listener and the other speakers, so that to the front of the speaker it emits its rear half-wave. This engineering solution eliminates the phase acceleration of the band speaker, compared to the significantly slower diaphragm speakers, from

2686 UI used for low and medium frequency. The use of a high-quality two-pole tape speaker allows speakers to reach the rare 34kHz at -3dB and 54kHz at -10dB (lw / lm) in the conventional type.

The body of the speaker is made of multilayer flexible material (eg plywood) and consists of a main body and a holder for the subwoofers. Through the shape of the housing and the mounting locations of the low-frequency and medium-high-frequency groups of speakers, their correct position relative to the working center of the loudspeaker is achieved. In the lower part of the case, where it is in contact with the floor, two strips are mounted, which stabilize the body and serve as a kind of legs of the product. In the surface treatment of the loudspeaker housings, natural wood oils are used, preserving the acoustic properties of the material.

The part of the housing that serves to mount the subwoofers is made by gluing four layers, pre-cut to the desired shape, low-resonance material (eg plywood, each layer 24 mm thick, with a total thickness of 96 mm). It is attached to the main body, for example by means of six screws and an adhesive material such as polyurethane adhesive), so that once assembled, it forms an integral part of the body.

Explanation of the attached figures

Figure 1 is a sectional view of the loudspeaker in profile;

figure 2 - the loudspeaker in full face (variants with left and right signal submission);

figure 3 - front and rear wave of the volumeless double dipole;

figure 4 - volumeless double dipole;

Figure 5 - measurement of the frequency band of OT with offset 9dB;

figure 6 - measured impedance characteristic;

Figure 7 shows the two low frequency bipolar speakers diagonally.

Figure 8 - the two subwoofers in full face.

Examples of implementation of the utility model

The main body of the loudspeaker can be of overall dimensions: Height - 1385 mm, Width - 424 mm, Depth - 645 mm, Thickness 20 mm and can be made by forming four layers of wood plywood, each of which is 5 mm thick. . During its formation, the wires connecting the middle and high frequency speakers to the filter are built in between two of the layers.

Through pre-milled holes in the inner layers of the holder, a place is provided for the wiring of the loudspeakers, as all wires are led to the lower rear end of the main body, where they are connected to the specially made filter boxes (crossovers) and do not visually load the overall vision of the product.

The filter boxes are made of MDF and can be, for example, in a cylindrical shape 7. They are used not only for mounting the individual elements of the crossover, but also for their shielding. They are connected to the speakers via a cable connection 8 and on these boxes are mounted the terminals for connecting the speakers to an audio amplifier.

The subwoofers are attached to the body of the loudspeaker (for example by means of six screws), in turn, to each other, in front of them the two speakers can be fixed by means of three studs made of stainless steel and six nuts of the same material ( Fig. 7). The studs keep the speakers at a distance from each other (for example at 70 mm - Technological distance required for the proper operation of the Volume-free double dipole). The panel with the mounted midrange and tweeters 3 is mounted to the housing by means of four screws.

The main technical characteristics of the loudspeaker are as follows:

Maximum supported power - 250W;

Frequency band (1 W / m): 34Hz - 34kHz (0, -3dB), 21Hz-54kHz (0, -10dB);

Unevenness: 0.9 - IdB (Fig. 5 - Measurement of the frequency band of OT with offset 9dB);

Nominal impedance: 40, (Fig. 6 - Measured impedance characteristic);

Sensitivity: 91dB / 2.83V;

2686 UI

External dimensions: Height 1385 mm, Width 424 mm and Depth 645 mm;

Weight of one loudspeaker (incl. 1 filter): 28 kg.

The construction of the claimed loudspeaker is a combination of two subsystems - in the low-frequency spectrum is used "Volume-free double dipole" (Fig.2 - 6 and Fig. 4), and in the medium and high-frequency - classical dipole, emitting sound waves bilaterally - back and forth. , relative to the speaker body. In this system, the emission of anterior (+) and posterior (-) half-wave (Fig. 3) (both 180 degrees to the dipole line) and their mutual "quenching" at points close to 0 degrees eliminates one of the main causes. of distortions, namely standing waves.

The loudspeaker consists of a housing 1, loudspeakers mounted in specially cut holes in the housing and passive filters of audio signals (crossovers) 7, mounted in separate boxes with terminals for connecting the loudspeaker to an audio amplifier, permanently connected to the speakers by wires 8 as shown in FIG. 2. The design used a three-band filtering system, which divides the supplied audio signal into low-frequency (21 - 400Hz), medium-frequency (400 - 4000Hz), and high-frequency (4000 - 54kHz) (Fig. 5 and 6).

The following loudspeakers are used in the requested loudspeaker:

- Two low-frequency bipolar speakers, representing electrodynamic diffusers, mounted in a specially cut hole in the middle of the lower part of the housing of the loudspeaker, as shown in Fig. 7 and 8. The two speakers are mounted opposite each other, located below 90 degrees to the body (dipole line). The construction of the Volumetric Double Dipole is similar to Linkwitz's famous "Double Dipole" and Ridtaler's "RiPol W Profile". The main difference from these designs is the removal of all the panels used to mount the speakers and creating semi-closed volumes for directing the front and rear half-wave. In the Volumetric Dual Dipole, each front half of the speaker is closed along its body so as to isolate the rear half-wave, which is emitted back from the body. In their rear part, with the help of the holder (2 from Fig. 1), the two speakers close the volume to each other and thus form a front half-wave for the two, which they emit forward. Thus mounted and operating in phase (NOT "Push / Pool"!), They together emit one front and one rear half-wave and work as one emitter (Fig. 4), but with an increased membrane area and correspondingly drastically increased acoustic energy, without this is detrimental to their other characteristics. The use of an open-frequency low-frequency section helps to avoid the main problems with systems using volumes, namely - avoiding the presence of standing waves, avoiding the presence of "coloring" of the sound, avoiding the presence of so. "Port voice" in bass reflex systems, "box sound", etc. In this open system, the low range is characterized by a deep and clear detail, is perceived as a whole with the whole picture, sounds natural and is not as strongly positioned as in closed systems. The configuration used significantly increases the acoustic energy at low frequencies and allows the speakers to reach 34Hz at -3dB and 21 Hz at -10dB (lw / lm). This in turn contributes to the linear frequency response of the products;

- Six midrange bipolar speakers, representing electrodynamic diffusers (4 of Fig. 2), mounted (together with the tweeter) on a special plate (3 of Fig. 2).

The positioning of the midrange speakers on the plate and their installation are performed in a special configuration that minimizes distortions in the midrange and in the best way acoustically interacts with the tweeter mounted on the same plate. The use of six small speakers instead of one larger one is in line with the need for speed and detail in the midrange spectrum, due to the fact that this is the only way to achieve a real musical picture. In turn, the plate is mounted in a special hole in the body of the loudspeaker, cut asymmetrically in the middle of the body itself, seen from the front (at a certain distance to the left for the loudspeaker used for the left channel and right - for the loudspeaker used for

2686 UI for right channel) - FIG. 2. This arrangement of the plate on the body also minimizes the harmful effects of distortions in the medium and high frequency spectrum caused by the physical laws when using open type systems;

- A high-frequency bipolar speaker of the "ribbon type" - (5 of Fig. 2), mounted on the above-mentioned plate, together with the six midrange speakers, in a special configuration. In the speaker used for the left channel, the tweeter is mounted on the left side of the panel. Respectively - in OT, used for the right channel - at the right end of the plate (Fig. 2). Their electrical connection is in reverse phase, relative to the listener and the other speakers, so that to the front of the speaker it emits its rear half-wave. This engineering solution eliminates the phase acceleration of the band speaker compared to the significantly slower diaphragm speakers used for low and midrange. The use of a high-quality two-pole tape speaker allows speakers to reach the rare 34kHz at -3dB and 54kHz at -10dB (lw / lm) in the conventional type.

The housing of the loudspeaker is made of multilayer flexible material (eg plywood) and consists of a main body 1 and a holder for the subwoofers (2 of Fig. 2). Through the shape of the housing and the mounting locations of the low-frequency and medium-high-frequency groups of speakers, their correct position relative to the working center of the loudspeaker is achieved. In the lower part of the case, where it is in contact with the floor, two strips are mounted, which stabilize the body and serve as a kind of legs of the product. In the surface treatment of the loudspeaker housings, natural wood oils are used, preserving the acoustic properties of the material.

The part of the housing that serves to mount the subwoofers (2 of Fig. 1) is made by gluing four layers, pre-cut into the desired shape, low-resonance material (eg plywood, each layer with a thickness of 24 mm, with a total thickness of 96 mm). It is attached to the main body, for example by means of six screws and an adhesive material such as polyurethane adhesive), so that once assembled, it forms an integral part of the body.

Claims (3)

A loudspeaker, characterized in that it consists of a housing, loudspeakers mounted in specially cut holes in the housing and passive filters of audio signals mounted in separate boxes with terminals for connecting the loudspeaker to an audio amplifier, which boxes are permanently connected to the speakers via wires with a three-band system for filtering and dividing the supplied audio signal into low frequency (21 - 400Hz), medium frequency (400 - 4000Hz), and high frequency (4000 - 54kHz). Speaker according to Claim 1, characterized in that the housing of the loudspeaker is made of a multilayer flexible material, the wires connecting the midrange and tweeters to the filter being built between two of the layers and consisting of a main body and a holder for the subwoofers, in the lower part of the case, where it contacts the floor, are mounted two strips that stabilize the body, and the part of the case that serves to mount the subwoofers is made by gluing four layers, pre-cut in the desired shape low resonant material and is attached to the main body so as to form an integral part of it. Loudspeaker according to claims 1 and 2, characterized in that it comprises two low-frequency bipolar loudspeakers, representing electrodynamic diffusers mounted opposite each other in a specially cut hole in the middle of the lower part of the housing, located below 90 degrees to the housing, as in the front they are closed with a thin low-resonance material, and in the back they close their volume with the help of a holder, forming a front half-wave for the two speakers; six midrange bipolar speakers, representing electrodynamic diffusers mounted together with the tweeter on a special plate; one you 2686 UI high-frequency bipolar band-type speaker mounted on the above-mentioned plate, together with the six midrange speakers, in a special configuration, with its electrical connection in reverse phase, relative to the listener and the other speakers, so that in front of the speaker it emits its back half-wave.