DEP0044237DA - Electroacoustic transmission system. - Google Patents

Description

Siemens & Hälske. Munich, 27 ^ 5 ^ 1949

Public limited company ΡΔ 9/520/132

Berlin- Si omens city

Postal address! <
M ü η ο h ' _m & η 1
Dienerstr ^"l 15/16

Electroacoustic © transmission system

With electroacoustic transmission systems in large rooms or in free places, the loudspeakers are generally distributed decentralized over an equal listening area! It is also already known j a single large volume "spre choir to use _f optionally has a certain Eichtwirkung and should cover dio entire listening area" Both embodiments have certain disadvantages j they recite particular _s when dio to be stepped aerogondo sound source ^ z ^ B , the speaker ^ is in the same room as the loudspeakers. »The invention eliminates this problem by" having a directional loudspeaker arrangement with several individual loudspeakers still lying in a row, so high above the listener, z «B« on the ceiling of the room and the listening surface is inclined at such an angle that in the ifborlappungsgebiot between the direct sound of the sound source, the speaker, and the loudspeaker sound, the sound paths of both have approximately the same length, preferably while maintaining a Schallwegdiffow renz smaller than 17 m, and that the directional characteristic of the sounds PRECHER arrangement so shaped and arranged _"$ that the Lautsprocherschall substantially over the area of influence dos direct sound addition to the remote Hörplätzon

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PA 9/520/132

comes into effect «

The invention and the corresponding © details are explained using the "dor illustration" for example »

In the case of the system, 'a room or '. in one mm. place in the. Eroion fri> au transferring sound source, ζ, Β «the speaker ', recorded by the microphone M« The direct sound of the sound source acts in the front room; D and supplies the _{listeners located there β} -E ¹ Ur-the sound supply of the more distant listener is a "loudspeaker arrangement ... straight emitter group 'in a row' on a narrow and long sohall wall single loudspeaker horn "consists," These single loudspeakers were all fed in phase from the same zonal and "cause a strong bundling of waves

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perpendicular to Schallwandobone they · are zwockmässig directed einsoi ^ · tig ^ trained to do by rückv / AERTS continuous sound to be suppressed on \ According to the invention. "is that Lautsprocheranordnung 1 so high above the listeners ^ ζ, Β" to dor dos ceiling areas, and is "the Hörflächo" under a sol »¥ ohon / Inkol W"zPAgonoigi; ^ that dor response "autsprechorschalls detected boreich S of the" I / _v in Wesent lichon the remote listening positions where ^ 'the direct sound not mchu ^ ür ..the regularity is sufficient "The microphone M is conveniently located in the extended baffle part of the loudspeaker arrangement I; findungsgomasa should be kept as cool as possible, over—. Ιαρροή sich.de ^ direct soundX and dor '- "loudspeaker sound ^ A _{listener located there ^ z ~ B"#} at place A, "hears about the same amount over C ¹ J. ο, distance I ^ don speak directly and about the Distance I ₂ ^Tom loudspeaker hor ^ The installation site of the loudspeaker arrangement 'L and its angle of inclination ¥ are crfindungsgomäsa so chosen "that the movement I ^ and 1" are approximately equal to each other; "There are" permissible with certain deviations, but in practice the sound wave difference should always be less than 17 π, since "if the difference is greater, a blurring is perceived and

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The comprehensibility becomes mangol-like «Dor advantage dor .or ·? Finding-related classification "consists essentially of" that in the entire "Ilauiu oino approximately equal display and comprehensibility is oobserved? furthermore, primarily only the listening area is illuminated "not, however, the dock of the room or some other reflective wall," so that the reverberation could not have an effect ^ It was suggested at si oh "boroi ^ s, loudspeaker arrangements sit moiireron in a series of liogonaen individual latit speeches after the straight group of radiators for the sound tibor-wear in grosson Eäumon or dorgl ^ zu Vürviondonü Speakers- arranged ^ The invention "bositst aomgo ^^^ or the advantage _} that a woniger starko sound-" bundling is sufficient for reverberation-free sound transmission, so one can use simpler loudspeaker arrangements with fewer single loudspeakers Törrnrondon than "previously "When mounted higher, s * E" on the DeGkOj less in the field of view of the

Claims (1)

~ 4- , - β: A / AJO JL. PA 9/520/132 ' '. ^v .. '. ■,. ■ '-> claim. Electroacoustic UT presentation system, Tdox dor. the. transmitting Sohallquolloj z ^ Bi S | SP3chor ^ in the same room as the © Lautsprochor "bofindot, characterized _? that a directed Lautsprochorclnung (1) with raelorercn after Xrt of the straight group of radiators in a row single loudspeakers, so high above the Hörorn , ζ ".Β" ^ is arranged inclined to the ceiling of the room, and the Hörflache at such an angle (W) ^ that in tTberlappungsgoTDiot (Ü) between the dome äirokton sound _k uer sound source, ζ "Β" of the speaker, and dom Loud speakers Ghall, the sound paths (1 * I ₂ ) both have approximately the same length, preferably while maintaining a sound path difference of less than 17 m and that the directional characteristic of the loudspeaker arrangement is shaped and set up in such a way that the loudspeaker reverberation is essentially beyond the effective range of the direct sound at the distant listening positions to the "effect comes"