MXPA98001441A - Transducers of vibrations inertia - Google Patents

Abstract

A transducer (9) of inertial vibrations characterized by a piezoelectric flexioner in the form of a plate (27), and a device (20.93) adapted to mount the flexor on a member (2) to be vibrated, the arrangement is such that a part of the flexioner is spaced from the member to move relative to the

Description

TRANSFORM OF INERTIAL VIBRATIONS TECHNICAL FIELD The invention relates to transducers and more particularly to vibration transducers for 5 loudspeakers comprising panel-shaped elements that radiate acoustic waves. BACKGROUND OF THE ART In GB-A-2262861 a speaker in the form of a panel is suggested which comprises: 0 a multi-odal radiator resonant element which is a unitary panel formed by two films of material i. on a core of space and in cellular construction • i'rtnsversal, where the panel is such that it has a proportion in !. re the rigidity of fie, ion (B), in all o ientations, 3 and the cube of the panel mass per unit surface area (μ) of at least 10; a mounting device that supports the panel or fixes it on a support body, in a non-free manner; '"). A n-iru isposi io io n the romecanico connected to the panel that ^? t'- > = >to be it» urn that an miaimim l l in the radiator pane in 3 nl "? 3 electrical inside a band of f remember ... -, -working for the loudspeaker »The document FP-A-2, 3ó ?, - AW'FUJI presents a vibrator a? U? V'Ü. which comprises a piero plate loaded with a mass located near its center of gravity and coupled to the diaphragm of the speaker to be vibrated through the periphery of the piezo plate. PRESENTATION OF THE INVENTION Modalities of the present invention employ members of nature, structure and configuration that can be obtained generally and / or speci fi cally by implementing the teachings of our PCT publication No. WQ < ? 7 09842 on the same date as the present one. Such members! Therefore, the ability to sustain and propagate energy vibration from the entrance curving waves in area (s) operates! iva f) 'that e e; biend fn) transverse thickly f uent but not e erally up to the edges of the lu! i M-bro s); se > - onf igu r an with or without phisical rigidity anisotropy to have vibrating components of resonant mode distributed over said area (s) in a manner beneficial to the acoustic connection with the ambient air; and they have predetermined locations, preferring either to be in-house or to use said device for the device of i.rar.-ijHi nr, d, i, as part of the operatively active operation. f'-.) or mobile faith) of is ef h ^ ') in relation f uii -ii rjvity of vibration Í Ú = -1 ica in d? chaf. areais) and point out, it has literally, that > _orrespond to the cn enid »ro > a Idl i • i -? »J- * c! vibrates tona. Are u »jz,» = »n 1- raised? publ i > "a ttit ^ i n: tf.? or" to < _ > > -p n i ng No.

W097 / 09842 of the same date as the present one for such members or in "passive" acoustic devices without transducer means, such as for reverberation or for acoustic filtering or for acoustically "harmonizing" a space or room; and in "active" acoustic devices with transducer means, such as in a wide range of sound sources or loudspeakers when they are supplied with input signals for their conversion into said sound, or for example as mi * ró fonos when They are e-posited to the sound to be converted into other signals, E- the invention refers to active acoustic devices in the form of loudspeakers. Members as mentioned above are referred to herein as "distributed" acoustic radiators and are intended to be characterized as in the above PCT application and / or otherwise in accordance with that speci? Cally provided herein. The invention is a transducer of inertial vibrations for a mi mbro > _? > Does it have the capacity to sustain and rotate uu? -? ter í-t v? bra > lonal d > ^ en a a f le, -? o > What about the? > terto-5 an i < tßa or a; ' that you see t raii see ~ ÍH 'm o! e on the e-thickness for energetic meid > J =. .jt vthi-n. Ón i- mu or tesonant di • =, taxes in said at least are -. and predetermined preferential locations or sites within said area for the transducer device and with the transducer mounted on said member in at least one of said locations or sites for vibrating the member to cause its resonance to form an acoustic radiator that provides an acoustic output when It resonates, where the transducer has a rich piezoel inflator in the form of a plate, a device centrally positioned in relation to the inflator in the form of a plate adapted to mount the mf lexator on the member to be vibrated, the arrangement is that a Substantial part of the infonation is the space of the member to move in relation to it, and a mass fixed on the periphery of the inflator. The mounting device can be a light rigid member. The inflectional! - pi ejoel étr trico can be crystalline. From another perspective, the invention is a loudspeaker characterized by a member that has the capacity to sustain and propagate vibrational input energy by increasing waves in at least one operative area that extends transverse 1 in relation to the thickness to have vibrating components of resonant mode d J st ri bm cs in said at least um r a. and that has predetermined locations or locations in the den! or of happiness - >; rea pai a. = »! transposer isposi ivo une une i, ratisrluc toi de onformídad > or as described above mounted to said member in at least one of said locations or sites to vibrate the member to cause its resonance forming an acoustic radiator that provides an acoustic output when it resonates. BRIEF DESCRIPTION OF THE DRAWINGS The invention is illustrated diagrammatically, by way of example, in the accompanying drawings, in which: Figure 1 is a diagram showing a loudspeaker distributed in accordance with that described and rei indicated in our application International co-pending No. W097 0 *? 842 $ Figure 2a is a partial section on line A-A of igu 1; Figure 2b is an enlarged view through a distributed mode radiator of the type illustrated in Figure 2a and showing two alternate constructions; Figure 3 is a diagram of a first mode of r nsduor j Figure 4 is a diagram of a second mode of t i-a. nsduc t r, and the ijure 5 is a di gr ama e one. THIRD MODE OF THE FASHION STYLE FASHION PREFERRED PAPA LLFVAP TO THE INVENTION With reference to Figure 1 of the drawings, a Jl t.aw is illustrated in rm ^ of p ^ nel ÍB1) > i < s type described and? ecl.? -, in our internal publication "* ca -pendien e No.

W097 / 09842 of the same date as the present one comprising a rectangular structure (1) carrying a resilient suspension < 3 > around its internal periphery that supports a panel < 2) Sound radiation distributed mode. A transducer < ), for example in accordance with what is described in detail with reference to our publications International co-pending Nos. W097 / 09859, W097 / 09861, W097 / 09858 on the same date as the present, is assembled fully and ex-lutely on or within the panel '2) in a predetermined location defined by the dimensions "?" and "y", whose location is calculated in accordance with what is described in our international publication co-pending No. 097/09842 of your tst date that the speaker, to throw inflate waves, ion in the panel to cause the panel to resonate to radiate an acoustic output. The transducer (9) is driven by a signal amplifier fl0 > , for example an audio amplifier, connected to the transducer by means of conductors (28). The amplifier load and the power requirements can be completely normal, similar to loudspeaker-type loudspeakers.

LúO? come to him, being 1 < A sen- > ? b i 1 I nity of the order of 86- 88dB /? -? Att under load conditions, the ampli fi cation load is highly re- I - = •! a to 6 ohm-., driving a. p tenci d > - 20 -SO? -t! = > . When the panel number and / or the metal p l ic l ion, it can be constructed to act as a heat sink for the transducer to remove the heat from the transducer motor coil and thus improve the handling of energy. Figures 2a and 2b are partial cross sections through the loudspeaker (81) of Figure 1. Figure 2a shows that the structure < 1 > 5 periphery (3) and panel (2) are connected together by respective adhesive bonding joints (20). Suitable materials for the structure include extruded metal frame frames, for example aluminum alloy or plastics. Suitable periphery materials- »include teri? Es? l eute- = > With rubber, for example, foam plastic. Suitable adhesives for joints (20) include polyphenols, ethyl esters, and cyanide. Figure 2b illustrates, to be seen, that panel (2) is a rigid light panel having a core (22) for example of a clear plastic foam (97) for example cross-linked oligomer chloride or a cellular matrix (98), that is, a honeycomb matrix of metal, plastic, or similar, in which cells are placed transverse to the lens, in the case of films, and in films; ? '", example of paper, cardboard, pyramid or metal sheet." "These are, of course," "," "," ",,,,,,,,,,,,,,,,. finias, by axis pl *> to bon, glass, l'evla »&'MR > or similar, in a way per se to increase its modulus Proposed materials for film ca.p? ^ and reinforcements They include carbon, glass, 'evlar (MR), No e? (MR), ie aramid fibers etc., in various layers and textures, as well as paper, sheets of pressed paper, melamine, and various synthetic plastic films from high modulus, such as Mylar (MR), aptan (MR), polycarbonate or, phenolic plastics, palyester to related plastics, and plastics rested with fibers, etc., as well as sheets or metal sheets. Vectra de ter ol es polymers of liquid crystals sample qe can be useful for the injection molding of films or 1 tradelgadas or bi n size envelopes smaller, let's say approximately 3 in diameter. This material forms a ^ >crystalline structure oriented in the direction of injection, a preferred orientation for the good propagation of water energy from the point of activation to the perimeter of the panel. Ad icone, such molding for this or other thermoplastics > Do you use the molding tool to take face and locate them? > -g? = tro > For example, slots or rings are used for the purpose of the operation. le 1 -t tor, by je l, 3a b in * d? motor and li suspension of magnets.

Ad ic i rebña ln > e! In addition, it is useful to locally imply skin thickness, such as in an area or ring of up to 150tf of the diameter of the transducer to reinforce this. ar ^? and beneficially connect the vibration energy in the panel. A high frequency response will be improved with the softer foam materials in this way. Materials core layer provided include fabricated honeycombs or corrugations of ao ho sheet aluminum alloy or evlar (MR), No and (MR), plain papers together, and various synthetic plastics films, as well as plastics or foams or good pulp materials, even aeroyel metals if they are one way in suf fi ciently ba a. Some suitable materials are 1? c =? core effectively present an automatic film formation at the time of its manufacture and / or otherwise have sufficient inherent rigidity for its lamination between the film layers. A high performance cell core material is known under the n > "> mb? e commercial" Rohacell "that you can be suitable nomo? it, jis, the bj ti ¿&; -; -; HUA 3? > j re -t pgide, '. ylobal or? - >? iia a p-tr- a "or particle, iip inc u • - • AIFI >????.. a - i'll in IT 11 IIIC 11 I > e, e μ 1 mi a > I or i i of 1 dsi = pas ile HI'II leo ¿.je peí. {1'l -lj, tr íIIDII 1 on > - < - < > -r > I i el l -,. I-Í fo 'u] a >?.. nirt re ri "? torque" panel employed skins of metal and metal alloys, or alternatively, a reinforcing carbon fiber Both these and designs can one. Airgel alloy or metal honeycomb core have radial screening properties that will be important in several FMC applications, and conventional cone or panel types do not have any inherent FMC screening capabilities. In addition, the preferred form of piezo and ele rodin transducers has dispersion rates. Magnetic or negligible radiation **. Conventional loudspeakers have a large magnetic field, up to 1 meter apart, unless specific components are taken. When it is important to keep sieving in one application, the electrical connection can be carried out on the conductive parts of an appropriate DML panel or else the foam is typically << or a similar interface can be used to mount the edges. l sn-a h-n-, i - ', (, í ~ can dampen the edges of the 2) pan e' - 'it - a mov ímiei jl-o > ? ', rs3i ^? and i o -.-, bor ea, the panel. Adi ional well alt ^ pi-tl? a »« > ! "E, --and can -tpli AR iu love my Adie not • one 1, by jempl and (as patches, fi xed on > - or i- • tel posi iune- = > >!; 'i > _ i ace for Hi io "uu movement un-.e????. ij dist ibuif also resonance in the panel can be made patches of a bitumen-based material is used or co It can be made of a resilient or rigid polymeric laminate material, some materials, especially paper and cardboard, and some cores can be of equal size. To be increased in the construction of the panels by means of the use of adhesives with resilient hardening instead of rigid hardening.Effective handle said selective heat includes specific application on the panel including its manet laminate material. er anen e in e associated with the. Borders and yeas can be ^ s * Important lighting for dominant and less dispersed low frequency vibration panel modes. The edge fixation of the damping device can usefully bring a panel with its fully framed sheet material, even if its es? Na = > they can be freely available, say for an e, tension given to lower frequencies. The fi ci nn'''t be uf ui i e tial adhesives or au-n-idhe-i i os. O ta? J forms of -nnot t iijuamii-nto >; '»T? L,?'? 1 i • J -'o f, e > nen i3 = means at ta-. μi.t Je loyrar- ^ e po > me i e »- > ??. a-.ar, ÍH? ? .idila-? f i ^ .l. sotu el mater lal > 'e ho ert predetermined effective average localized positions of said area. An acoustic panel in accordance with what is described above is bidirectional. The sound energy coming from the background is not strongly related in phase with the energy coming from the front. Consequently, the benefit of the overall addition of the acoustic power in the room, sound energy of uniform sequence distribution, effect of reflection waves and seasonal ai is obtained. reduced and with the advantage of a supeap reproduction j.jp l space and natural environment in the reproduction of the recorded souvenirs. While the radiation coming from the acoustic panel is n big measure or d i r í. > "Ina 1, the percentage of information r lated with phase is increased off-axis." For an improved focus of the stereophonic image, the placement of the speakers, as frames, at the usual height of a pe, sc> standing, it confers the benefit of a placement 1 i gei menté ^? > ^? '^ dee trust the person who > > ".! i -s - > in > The norm ent op i iz ndo thus the faith e.-. Tere IT-e iitiniiia -m i c 4 ge ría ti ian ula. "1 i? U? E? I do not miss the ion t l-? μ < - r-ona that esc > The proportion is * an additional component. By ort? .1 yii? Eu you fuip. I'm not sure, it forms a b- »ena is r ofoní.

There is an additional advantage for a group of people who listen compared to conventional loudspeaker reproduction. The inherently scattered nature of acoustic panel sound radiation ie provides a volume of sound that does not obey the law of the inverse square for the distance for an equivalent point source. Due to the fact that the lowering of the intensity with the distance is much smaller than the precise by the law of the inverse square, then consequently in the case 1 ^ people who listen and are placed outside the center and in an optimal way, the field of intensity for the ali.aopy mo and a superior stereophonic effect in co stack i with conventional speakers s. This is due to the fact that people who listen placed outside the center do not suffer from the double problem due to the proximity to the nearest speaker; firstly, the excessive increase of the sound coming from the nearest speaker, and then the corresponding volume distribution of the rovien sound of the furthest speaker. K tste tan, bié-, a v! -i a from one to the lavo: flat, in the form of a panel, light, v i sua l eu te atr-ivo, of good quality of sophistication and that; ,;;;;;;;;;;;;;;;;;;;;;;;;;;; - tor. from iiiii'j'f "t" to 11-3 > - t n a sound of r 1 ugo complete μ? or w? -n o-T e Je i -nJ =! d i af r gitn de une]. The figure shows a modality of a piezoelectric transducer (9) in which a piezoelectric crystal-like flegeller (27) mounted centrally on one end of a rigid lightweight cylindrical block (93). of rigid plastic foam rigidly fixed in an opening (20) in a radiator panel in a distributed mode (2) for example by means of an adhesive, said end of the block (28) projects from the face of the panel (2) in such a way that the periphery (31) of the f lexator (27) is suspended freely adjacent to > -? face of the panel (2). An annular ring (25) of plastic, for example polyvinyl chloride loaded with mineral, is rigidly fixed on the periphery of the piezo toner (27) to add mass to the free periphery of the piezoelectric igniter. Therefore, when a.1 transducer energy is supplied with an acoustic serial, the piezo beater (27) vibrates and due to its mass sends inflate ion waves in the panel (2) to cause the panel to resonate and produce and radiate an acoustic output. The transducer (9) can be covered by a dome-shaped envelope (26) which is fixed on the part! (2) for μroteye? e] 1 piin u tur. The l? Iiii l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l; pti fet H f "r, l) nobre 1 * numeer iie,.? n panel (2) i example with urn =? helper of an adhesive, on the central portion of the flexioner (27) freely suspended in a cavity (29) in the panel (2) in such a way that only the periphery (31) of the flip-flop (27> is in contact with the panel.) A dough (25), for example of plastic material, is fixed on the center of the flexing (27) by the interposition of a damping cushion (30) of resilient material, for example of an elastic polymer, and consequently, an acoustic signal applied to the f1 xi typed11 p tezoel érrico will cause The freezer and po device will cause the release of waves and inflection in the »The transducer-impeller effect is i-ried by the actuator Id (27) with the ma-> g (25) face i nc resents i - > Í. uei ia. The driver arrangement (9) of Fig. 5 is similar to the transducer arrangement of Fig. 4 except that in this embodiment a pair of pi ezoelectric flex i operators (27) are set in opposite isos of a cavity (29) a through a panel (2) to operate in an LCO mode. In this case, the centers of both -fi; ? onidore- > C2"7) are connected together or a common mass (5) t on i ojíet ^ de ~ Muo ti gi i = nro -ni or (r ilie ts ts do--, between each li" 19 ñj (5) AP I AGTGIN INDUSTRIAL lo ~ > ransil toto-r, the first invention made simple in terms of its construction and effective in its use.

Claims (4)

1. CLAIMS 1.
2. An infrared vibration transducer (9) for exciting a member (2) that has the ability to sustain and propagate an input vibrational energy by inflecting waves in at least one operating area that extends transversely in relation to the thickness to have resonant mode vibration components distributed in said at least one area and having predetermined preferential locations or sites within said area for the transducer device 1 and having the transducer (9) mounted on said member in one of said locations or if to make the member vibrate to reflect its resonance forming an acoustic radiator that provides an acoustic output when it resonates, where the transducer has a piezoelectric electric inflator in the form of a plate (27), a device ( 93) positioned centrally in relation to the inflator in the form of a plate adapted to mount the in f le? Ionator on the member (2) to vibrate, the arrangement is such that a substantial part of the i nf lex ionador -? it is spaced from the m i emb t o (?) for ~, n movtmierdo en relar < in the iruniiio, and ims. mass (25) fi ned .ntirs 1 -J er i i f f. 1 .-- i-luritor • 2 »A 11 r or d riv e v i r > - jn? ~ "r" nercoals in conformity f on 1 a re mdi '- i ón 1, car - ictei i'ad because the device and assembly>, c?) e -> >. n member Light weight.
3. 3. An inertial vibration transducer according to claim 1 or claim 2, characterized in that the piezoelectric inflator (2) is of crystalline form.
4. 4. A loudspeaker (Bl) characterized by a member (2) having the ability to sustain and propagate input vibrational energy by inflecting waves in at least one operating area that extends transversely relative to the thickness to have components of vibration of resonant mode distributed in said at least one é räta. and having pre-determined predetermined locations or sites within said area for a transducer device (9) and having a transducer of con fi dence as claimed in any of the foregoing indications mounted on said member (2) at less one of said locations or sites to vibrate the member to cause its resonance forming an acoustic radiator that provides an acoustic output when it resonates.