Loudspeaker with controllable resonances
 Acoustical device / 2250573Proposed acoustical system has basket with moving-coil loudspeaker and acoustical baffle disposed behind the latter. Acoustical baffle is made in the form of truncated cone enclosing entire surface of loudspeaker and has transverse slot on side surface. Acoustical baffle base is secured on front wall of basket over loudspeaker perimeter and its top is joined with loudspeaker magnetic system; acoustical baffle surface is made of sound-absorbing material. Transverse slot is made on acoustical baffle perimeter so that it divides the latter into two members. Top member joined with loudspeaker magnetic system has concave edge. Transverse slot may be disposed in bottom part of acoustical baffle with its edges overlapping and gradually bent out apart, bottom edge being bent out from loudspeaker. |
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Acoustical device / 2250573 Proposed acoustical system has basket with moving-coil loudspeaker and acoustical baffle disposed behind the latter. Acoustical baffle is made in the form of truncated cone enclosing entire surface of loudspeaker and has transverse slot on side surface. Acoustical baffle base is secured on front wall of basket over loudspeaker perimeter and its top is joined with loudspeaker magnetic system; acoustical baffle surface is made of sound-absorbing material. Transverse slot is made on acoustical baffle perimeter so that it divides the latter into two members. Top member joined with loudspeaker magnetic system has concave edge. Transverse slot may be disposed in bottom part of acoustical baffle with its edges overlapping and gradually bent out apart, bottom edge being bent out from loudspeaker. |
 Loudspeaker with controllable resonances / 2282316Loudspeaker with controllable resonances, in which to opposite walls of body, or to magnet of loudspeaker speaker, a brick of resonance wood is tightly connected with a selected set of resonances, by means of which redistribution of energy occurs from native oscillations of body walls and of speaker to consonance. |
 Device for high quality reproduction of sound / 2292128Device for high quality sound reproduction includes a source of sound and unit for adjusting sound pressure, positioned inside a body with sound-reflective surface. Unit for adjusting sound pressure in the body is made in form of sound-absorbing element, including system liquid - saturated steam with boundary, formed on developed surface of heat accumulator, while aforementioned liquid - saturated steam system is pressurized. Device also contains chamber isolated from environment, provided with heat exchanger and connected to sound absorption chamber with possible movement of gases from sound absorption chamber into additional chamber and return of condensed gases into sound absorption chamber. Device may additionally be provided with evaporator, positioned in the sound absorption chamber in the area where it is connected to additional chamber. |
 Vortex damper of acoustic system / 2312469Acoustic system contains a loudspeaker, positioned in a volumetric body made of sound-absorbing material, frontal part of which serves as emitter of primary acoustic signal. Additionally the acoustic system contains at least one conic vortex damper in back part of the loudspeaker in form of rigid radially sector-like blades twisted along their length, smoothly changing the incidence angle to the flow of passing acoustic signal. |
 Acoustic system / 2321186Claimed acoustic system contains a case with high frequency and low frequency loudspeakers mounted on its face panel, which panel is inclined towards the back panel of the case and displaced towards the inside relatively to the plane of its frontal vertical window. along its perimeter the face panel is rigidly connected to case walls. The high frequency loudspeaker is provided with a horn, formed by a part of inclined face panel, two sides and top shield. The last three parts are rigidly connected to the face panel, to each other and to adjacent sections of perimeter of plane of frontal vertical window of the case. The sides may be made flat, ensuring linear characteristic of horn expansion, or curvilinear, ensuring exponential characteristic of horn expansion. The angle of inclination of face panel α is selected within range between 7° and 35°. As a result, sound quality is improved and vibration of face panel is reduced. |
 Acoustic system / 2331990Acoustic system includes a case with a dynamic at its front panel and a vibration damping element placed inside. The vibration damping element is a triangular prism capable of redistribution of sound wave energy to the case corners where the rear and side panels are joined. One of the side facets of the prism is rigidly fixed to the rear panel of the case. |
 Acoustic system / 2353072Invention relates to electrical acoustics and may be used where high quality of sound reproduction is required, e.g. halls and studio insonification. Acoustic system consists of a housing, dynamic head of loudspeaker, fixing elements and phase-inverting hole. In section, the wooden housing is oval-shaped and stretched along vertical symmetry axis of the item. One round opening is made at the opposite sides with their centres being on horizontal symmetry axis. One of the openings is closed tightly by resonating wooden end wall. The dynamic head diaphragm in loudspeaker is in the second hole of the housing. The perimeter of the above housing forms phase-inverting hole together with the above hole edges. The width of phase-inverting hole allows for creating maximum value of coherent wave, whereas the resonating end wall is in the form of segment, which is bent so that to ensure precise angle for maximum sound wave reflection. The end wall thickness is less than the housing thickness ensuring end wall vibration. |
 Technology of built-in acoustic transmission line with closed loop / 2377740Housing is proposed, which evens out acoustic impedance, which contains a loud speaker fitted in the buffer cavity of the mouth of the transmission line with a closed loop. The transmission line consists of a terminal element, inner and outer walls of the housing, high density lining and a mouth area. The transmission line eliminates internal chaotic standing waves, at the same time providing for standing waves at variable frequency, which, due to superposition of waves, compensate for output loss at high frequencies due to mass acceleration, at the same time damping resonance of the loud speaker. Also the housing, which evens out acoustic impedance, is used for creating pressure which loads the loud speaker directly into the transmission line with a closed loop and an acoustic low-pass zonal filter is used to convert output only into the low-frequency component through a port. |
 Loud speaker / 2381631Invention relates to electroacoustics, particularly to compact high-quality loud speakers for sound-reproducing equipment. The loud speaker has a housing, an electrodynamic head rigidly attached to the housing, and a passive radiator. Between the electrodynamic head and the passive radiator there is an acoustic channel whose cross sectional area is (0.1-0.5)Sdif, area of the passive radiator is (1-20)Sdif, length of the channel is selected from the condition (0-0.4)D and distance between the electrodynamic head and the passive radiator is equal to (0.01-0.5)D, where Sdif is area of the diffuser of the electrodynamic head; D is diametre of the passive radiator. The acoustic channel is made in form of a pipe placed coaxially with the electrodynamic head. For accurate tuning, the acoustic channel can be made telescopic. |
 Acoustic transformable system / 2433566Acoustic transformable system includes a set of tubular sections of temporary structures mated by end faces, fixed by fastening elements, wherein the set of tubular sections includes a frontal, closing, redirected and intermediate sections; on the outer and inner surface of the redirected sections there are reinforcement ribs with trapezoidal grooves whose inner surface is fitted with resilient seals; the redirected, frontal and closing sections are an axially transformable, telescopic structure in which the number of intermediate sections per unit is less than the number of redirected sections; the fastening elements tie the frontal and closing sections and are fitted with locking devices and the closing section has phase-inverting channels. |
FIELD: acoustics and sound reproduction technologies.
SUBSTANCE: loudspeaker with controllable resonances, in which to opposite walls of body, or to magnet of loudspeaker speaker, a brick of resonance wood is tightly connected with a selected set of resonances, by means of which redistribution of energy occurs from native oscillations of body walls and of speaker to consonance.
EFFECT: increased sounding quality of acoustic systems.
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The invention relates to the field of acoustics and sound reproduction, aimed at improving the quality of the speaker.
A well-known speaker with a natural resonator, which uses the resonance of a string instrument such as violin, viola, cello, double bass or acoustic guitar, which allows you to get audio steriseal. The device has a housing in the form of figure 8, having at least one hole on the front surface [1].
In addition, the known loudspeaker with high-profile panel, in which the location of the voice coil in the annular gap provided with elastic suspension, the head of the speaker is a middle - and high-frequency head, the frame element has a body which, together with paleobasin element, forms a hermetic casing, paleobotany element adapted to rezoniruya generating an acoustic output signal, and the coil is attached to penelopina element about its geometric center [2].
Listed design speakers are difficult to manufacture, since it is necessary to use a lot of high-quality resonant material; a fairly sophisticated technology configuration, additionally, limited opportunities in the manufacture of loudspeakers of different sizes and shapes.</>
The present invention is to improve the sound quality of conventional loudspeaker without significant changes in its design. While the bar is made of resonant wood that is used for making musical instruments, closely attached within the speaker or to the walls of the speaker, or from the side of the magnet of the speaker.
The essence of the proposed technical solution is that the bar of the resonance of the wood, such as cedar, fir, maple, birch, etc., closely attached within the speaker or to the opposite walls of the speaker, or to the magnet of the speaker. The resonances of the bar is selected so that energy of oscillations of the body and the dynamics of the loudspeaker is redistributed in controlled oscillations, whose frequencies are perceived by the human ear as consonance that improves the sound quality of the loudspeaker.
The novelty item is that management resonances in loudspeaker at the expense of the bar of the resonant wood with specially selected resonances, which is closely attached within the speaker to the opposite walls of the speaker or to the magnet of the speaker loudspeaker. There was a new set), the governmental signs, namely, the bar of resonant wood, closely attached within the speaker to the opposite walls of the speaker or to the magnet of the speaker loudspeaker, redistributes the energy of the vibrations of the walls of the casing and wireless speaker in consonance to improve the reproduction of the loudspeaker.
Figure 1 shows the tight connection of the bar of the resonance of the wood between the opposing walls of the loudspeaker.
Figure 2 is a variant of the tight joining of the bar of the resonance of the wood to the magnet of the speaker and the wall of the loudspeaker.
Figure 3 is a variant of the tight joining of the bar of the resonance of the wood to the magnet of the speaker the speaker.
The bar of resonant wood (1) with specially selected resonances tightly mounted within the speaker to the opposite walls (3, 4) of the housing 1, or mounted inside of a loudspeaker magnet speaker (2) and the wall (3) speaker figure 2, or figure 3 is installed inside of a loudspeaker magnet (2) the dynamics of the loudspeaker. The walls of the casing (3, 4) of the loudspeaker can be: opposite side walls; front and rear; upper and lower inside the loudspeaker. The bar of resonant wood (1) can be closely attached to encam the speaker perpendicular or at an angle. The bar of resonant wood (1) closely be attached to the magnet (2) the dynamics of the loudspeaker, for example, by gluing 3. The vibrations emitted by the body of the speaker and the speaker loudspeaker are parasitic, usually degrades the sound quality. The proposed design of the loudspeaker allows you to redistribute the energy of the natural vibrations of the speaker and speaker consonance, which are qualitatively improve the reproduction of the loudspeaker.
The proposed design of the loudspeaker is technologically feasible, cost-effective.
Sources of information
1. French patent No. 2739997 from 10.10.1996, "Speaker with a natural resonator"; H 04 R 1/28; patentee: KIM YOUNG AHN; publ. 18.04.1997.
2. Russia's bid 20001108571 from 13.10.1998,; H 04 R 1/00; patentee: new Transducers limited.
The speaker managed resonances, characterized in that the inside of the speaker to the opposite walls of the casing or to the magnet of the speaker loudspeaker closely attached to the bar of resonant wood with a selected set of resonances, which is a redistribution of energy vibration of the walls of the casing and dynamics in consonance.