EP0696155A1 - Methode de sonorisation d'un local clos ou d'un espace ouvert et systeme acoustique permettant de la realiser - Google Patents

Methode de sonorisation d'un local clos ou d'un espace ouvert et systeme acoustique permettant de la realiser Download PDF

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Publication number
EP0696155A1
EP0696155A1 EP92911868A EP92911868A EP0696155A1 EP 0696155 A1 EP0696155 A1 EP 0696155A1 EP 92911868 A EP92911868 A EP 92911868A EP 92911868 A EP92911868 A EP 92911868A EP 0696155 A1 EP0696155 A1 EP 0696155A1
Authority
EP
European Patent Office
Prior art keywords
frequency
loudspeakers
additional
sonification
heads
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP92911868A
Other languages
German (de)
English (en)
Other versions
EP0696155A4 (fr
Inventor
Alexei Vladimirovich Vinogradov
Vladimir Sergeevich Konischev
Vladimir Vladimirovich Smirnov
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Individual
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Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0696155A4 publication Critical patent/EP0696155A4/fr
Publication of EP0696155A1 publication Critical patent/EP0696155A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K15/00—Acoustics not otherwise provided for
    • G10K15/04—Sound-producing devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/26—Spatial arrangements of separate transducers responsive to two or more frequency ranges
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00—Stereophonic arrangements
    • H04R5/02—Spatial or constructional arrangements of loudspeakers

Definitions

  • This invention relates to the field of acoustic wave physics and may be used for sonification of enclosed and open spaces using acoustic pseudo stereo systems.
  • the disadvantage of the above method and device is a redundancy of directed sonification and the lack of its voluminosity.
  • the closest technical solution is the method of sonification of closed and open spaces including a separation of spectral components to different frequency bands, conversion of electrical signals into acoustic ones by means of paired and in-phase connected main and additional electroacoustic transducers providing coherent acoustic waves and mounted in parallel and coaxially facing each other at various distances in accordance with various frequency bands.
  • Said method has been implemented in an acoustic system for sonification of enclosed and open spaces comprising paired main and additional electroacoustic transducers mounted, respectively, on the basement and on the holder so that the radiating apertures face each other, connected in parallel and in-phase to the source of sine electric signal, its frequency being equal to that of the acoustic signal (See “Izobretatel i Ratsionalizator” Magazine, No.6. 1985, pp.16-17, USSR).
  • AFC amplitude-frequency characteristic
  • the basement of the invention is to widen the AFC and decrease its irregularity which allows, through superimposing radiated waves to form non-directional secondary acoustic field sources providing qualitative and natural voluminous sounding and peak signal levels with minimal frequency non-linear and transitional distortions.
  • the task is solved by the new method of sonification of enclosed and open spaces and the new acoustic system implementing thereof.
  • the new method of sonification of enclosed and open spaces comprising isolation of electric signal spectral components that correspond to various frequency bands, conversion of electric signals into acoustic ones by means of paired and in-phase connected electroacoustic transducers providing coherent of acoustic waves and mounted parallel and coaxially facing each other at various distances corresponding various frequency bands, the main and additional transducers are mounted at distances equal 0.5-2.0 times of that where the irregularity of the characteristic is minimal within each frequency band in directions normal too the axes of transducer mounting and not restricted by their face panels, with characteristic sensitivity of each additional radiator being 1-2 dB higher than that of each main radiator, whereas the excessive acoustic power fed to the additional transducers is being extinguished throughout an entire stage of sonification.
  • transducers with different frequency bands and face panels facing each other are mounted in single or several planes relative each other.
  • cases of the low-frequency transducers, the middle-frequency, and high-frequency transducers are mounted with provisions of adjustment of their position in vertical and horizontal planes relative to the basement, low-frequency transducers and middle-frequency transducers, respectively.
  • the above set of essential features is aimed at achievement of a technological result and stays in a cause-effect relationship with it and, as compared to known solutions, allows to form non-directional acoustic field sources with the frequency characteristics of minimal irregularity thus providing qualitative and natural volume sounding.
  • Fig. 1 shows the acoustic system for sonification of enclosed and open spaces
  • the method for sonification of enclosed and open spaces is accomplished as follows.
  • An acoustic system is assembled from a set of paired electroacoustic transducers with various frequency bands and distances between transducers' heads facing each other and connected in-phase (at the moment of switching on the current the cones of heads are pushed out and pulled in a similar manner) which convert electric signals into acoustic ones providing coherence of acoustic waves.
  • Heads of radiators of the same type are placed at distances corresponding a homogeneous AFC within each band in directions perpendicular to axes of radiator heads mounting and not restricted with face panels.
  • the ranges of distances between radiator heads of the same type are determined experimentally to obtain a minimum irregularity of the AFC with characteristic sensitivity of each radiator determined by ratio of acoustic pressure to the power consumed.
  • the set of paired radiators may comprise from one to three radiators and, in an ideal case, may comprise a radiator for each extracted note. Paired radiator heads with different frequency bands with the panels facing each other are mounted in a single or in different planes relative to each other.
  • the claimed method has been implemented in an acoustic system for sonification of enclosed and open spaces.
  • An acoustic system for sonification of enclosed and open spaces comprises basement 1 on which cases 2 of low-frequency loudspeaker are mounted.
  • Each of low-frequency loudspeakers possesses the head of loudspeaker comprising cone 4 with sound coil 5 and magnet core 6.
  • On the top side of cases 2 plates 7 are installed to which brackets 8 are fastened, to the top plates of which supporting rings 9 are attached where middle-frequency loudspeakers 10 are mounted.
  • Each loudspeaker 10 comprises a head including cone 11 with coil 12, magnet core 13 and a device for damping excessive sound power due to passive elements which are not included in the acoustic system (not shown in the drawings).
  • brackets 14 are mounted to the top plates of which frame 15 is attached along the axis of which in vertical plane at the center of horizontal crossbar of frame 15 high-frequency loudspeakers 16 are mounted and fixed.
  • Each loudspeaker 16 has a head including cone 17 comprising sound coil 18 and magnet core 19.
  • Each pair of cones 4, 11, and 17 of low-frequency, middle-frequency, and high-frequency loudspeakers 3, 10, and 16, respectively, is mounted so that they face each other and the front panels of cones 4, 11, 17 are parallel and coaxially opposite in vertical and horizontal planes.
  • the heads of loudspeakers 3, 10, 16 are mounted at distances from each other corresponding to equalized frequency response in the limits of each frequency band in directions perpendicular to the axis along which the heads of loudspeakers 3, 10, and 16 are mounted and which are not limited by their front panels.
  • the total frequency response (see Fig. 4) of all three pairs of loudspeakers 3, 10, and 16, provided the above conditions are adhered to, must demonstrate a minimum of irregularities and approach the trapeze form, with no splashes and gaps both in the zone of characteristic junction of separate loudspeakers 3, 10, and 16 and in general during operation of the acoustic system.
  • Adjustment and mounting of the acoustic system is carried out as follows.
  • the low-frequency loudspeakers 3 in cases 2 are mounted on a special stand (not shown in the drawings) by front panels of cones 4 so that their face each other in keeping of strict parallelism and coaxiality of front panels both in vertical and horizontal planes, the distance S lf between cones 4 is fixed.
  • Sound cone 5 of cones 4 connected by magnet cores 6 pair-wise and in-phase are inserted to the source of sound signal (not shown in the drawings).
  • the selection of distances between front panels of cones 4 in general depends on operating frequency range of loudspeaker 3, frequency response of pair of loudspeakers 3, and also on parallelism and coaxiality of front panels of cones 4.
  • An adjustment of the acoustic system is carried out by displacement of loudspeakers 3 toward each other or by disjoining one with respect to the other with measuring of frequency response when the pair of cones 4 is in operation with sound coil 5 and measuring the spectrum of the radiated frequency in direction perpendicular to the axis along which the heads of loudspeakers 3 are installed and which are not limited by their front panels, for example, by means of the Clark Technic frequency spectrum analyzer.
  • displacement of loudspeakers 3 one with respect to the other an optimal distance between them is found, where the frequency response of radiating sound field is closed to equalized without splashes and gaps in it.
  • body 2 of loudspeakers 3 is fixed and fastened by means of special fixing elements of the stand.
  • the total adjustment of all three pairs of loudspeakers consists in the measurement of spectrum of the radiating frequency response in directions perpendicular to the axis along which the head of loudspeakers 3, 10, and 16 are mounted and which are not limited by their front panels, by means of the Clark Technic frequency spectrum analyzer.
  • the low-frequency loudspeakers 3 are mounted so that their front panels of cones 4 face each other, and disposed inside bodies 2 fastened to basement 1.
  • the bottom plates of brackets 8 are mounted and fastened, and the top plates of brackets 8 are connected to the down part of supporting ring 9 of middle-frequency loudspeakers 10, strictly following the distance between front panels of cones 11 of loudspeakers 10, as determined during adjustment.
  • the high-frequency loudspeakers are mounted and fastened, strictly following the distance between front panels of cones 17 of loudspeakers 16, as determined during adjustment.
  • Frame 15 with high-frequency loudspeakers 16 is mounted and fastened in the upper part of supporting ring 9 of middle-frequency loudspeakers 10.
  • the checking of the system operation ability is carried out.
  • a correction is carried out by means of displacement and fastening heads of loudspeakers in places, where the irregularity of summary frequency response of the acoustic system is minimal.
  • the acoustic system for sonification of enclosed and open spaces operates in the following manner.
  • a sonic signal is supplied which can be produced directly from a microphone or any other carrier of record of any kind (not shown in the drawings).
  • the sonic signal produces mechanical vibrations of sound coils 5, 12, and 18 of cones 4, 11, and 17, which is proportional, in an ideal case, to the sonic signal.
  • all cones 4, 11, and 17 are vibrating in opposite directions along their own axis.
  • Mechanical vibrations are converted to sonic oscillations of air particles which are spreading out in directions of pairwise opposite cones respectively. In the space between the cones facing each other the interference (superimposition) of the acoustic waves excited by them occurs, which leads to formation of secondary sound sources.
  • claimed method of sonification of enclosed and open spaces and an acoustic system permits to raise the quality of voluminous non-directional sounding with maximum achievement of naturalism of sound when the up-to-date and also morally obsolete heads of loudspeakers are used, to refrain from using any kinds of electric filters because the system itself represents a system of acoustic filters, which will lead to the decrease of acoustic pseudo stereo system costs.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Multimedia (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
EP92911868A 1992-04-23 1992-05-22 Methode de sonorisation d'un local clos ou d'un espace ouvert et systeme acoustique permettant de la realiser Withdrawn EP0696155A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SU5039690 1992-04-23
SU925039690A RU2018207C1 (ru) 1992-04-23 1992-04-23 Способ озвучивания закрытых помещений и открытых пространств
PCT/RU1992/000109 WO1993022889A1 (fr) 1992-04-23 1992-05-22 Methode de sonorisation d'un local clos ou d'un espace ouvert et systeme acoustique permettant de la realiser

Publications (2)

Publication Number Publication Date
EP0696155A4 EP0696155A4 (fr) 1995-10-05
EP0696155A1 true EP0696155A1 (fr) 1996-02-07

Family

ID=21602971

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92911868A Withdrawn EP0696155A1 (fr) 1992-04-23 1992-05-22 Methode de sonorisation d'un local clos ou d'un espace ouvert et systeme acoustique permettant de la realiser

Country Status (5)

Country Link
EP (1) EP0696155A1 (fr)
KR (1) KR0149685B1 (fr)
AU (1) AU1972992A (fr)
RU (1) RU2018207C1 (fr)
WO (1) WO1993022889A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3065135A1 (fr) * 2017-04-10 2018-10-12 Cabasse Enceinte acoustique

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2047277C1 (ru) * 1993-08-06 1995-10-27 Александр Сергеевич Гайдаров Акустическая система
WO1995034183A1 (fr) * 1994-06-08 1995-12-14 Zhagirnovsky Mikhail Semenovic Procede de creation d'un champ acoustique et systeme acoustique associe
RU2503140C2 (ru) * 2012-06-19 2013-12-27 Закрытое акционерное общество "НТК" Способ озвучивания помещений

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987003994A1 (fr) * 1985-12-23 1987-07-02 Satt Communications Ab Emetteur de son
WO1990005434A1 (fr) * 1988-11-08 1990-05-17 Timo Tarkkonen Agencement de haut-parleur
EP0390123A2 (fr) * 1989-03-31 1990-10-03 Kabushiki Kaisha Kenwood Générateur acoustique non directionnel et système de haut-parleur associé
DE4019645A1 (de) * 1989-06-20 1991-01-03 Pioneer Electronic Corp Lautsprechersystem

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3608665A (en) * 1969-09-16 1971-09-28 Mohamed B A Drisi Sound-reproducing structure
GB1368070A (en) * 1971-12-13 1974-09-25 Borisenko A V Sterophonic sound-reproducing system
US3715008A (en) * 1972-01-31 1973-02-06 Columbia Broadcasting Syst Inc Loudspeaker cabinet assembly and method
JPS5585189A (en) * 1978-12-22 1980-06-26 Komatsu Kimi Speaker unit
US4391346A (en) * 1979-10-04 1983-07-05 Naoyuki Murakami Loud-speaker

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987003994A1 (fr) * 1985-12-23 1987-07-02 Satt Communications Ab Emetteur de son
WO1990005434A1 (fr) * 1988-11-08 1990-05-17 Timo Tarkkonen Agencement de haut-parleur
EP0390123A2 (fr) * 1989-03-31 1990-10-03 Kabushiki Kaisha Kenwood Générateur acoustique non directionnel et système de haut-parleur associé
DE4019645A1 (de) * 1989-06-20 1991-01-03 Pioneer Electronic Corp Lautsprechersystem

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO9322889A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3065135A1 (fr) * 2017-04-10 2018-10-12 Cabasse Enceinte acoustique

Also Published As

Publication number Publication date
WO1993022889A1 (fr) 1993-11-11
EP0696155A4 (fr) 1995-10-05
RU2018207C1 (ru) 1994-08-15
KR0149685B1 (ko) 1998-11-02
KR940701630A (ko) 1994-05-28
AU1972992A (en) 1993-11-29

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