WO2015072780A1 - Dispositif à réverbération variable possédant une fonction de sélection et dispersion de fréquence - Google Patents

Dispositif à réverbération variable possédant une fonction de sélection et dispersion de fréquence Download PDF

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Publication number
WO2015072780A1
WO2015072780A1 PCT/KR2014/010959 KR2014010959W WO2015072780A1 WO 2015072780 A1 WO2015072780 A1 WO 2015072780A1 KR 2014010959 W KR2014010959 W KR 2014010959W WO 2015072780 A1 WO2015072780 A1 WO 2015072780A1
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Prior art keywords
variable
sound
sound absorbing
volume
adjusting plate
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PCT/KR2014/010959
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English (en)
Korean (ko)
Inventor
김재평
배성근
현진오
김지경
이에스더
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김재평
주식회사 케빅
대림대학교 산학협력단
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Priority to KR1020140175518A priority Critical patent/KR101765993B1/ko
Publication of WO2015072780A1 publication Critical patent/WO2015072780A1/fr

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/99—Room acoustics, i.e. forms of, or arrangements in, rooms for influencing or directing sound
    • E04B1/994—Acoustical surfaces with adjustment mechanisms
    • 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
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • 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
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • 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
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/161—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general in systems with fluid flow
    • 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
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects
    • 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
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/20—Reflecting arrangements
    • 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
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/26—Sound-focusing or directing, e.g. scanning
    • G10K11/28—Sound-focusing or directing, e.g. scanning using reflection, e.g. parabolic reflectors
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B2001/8414—Sound-absorbing elements with non-planar face, e.g. curved, egg-crate shaped
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B2001/8423—Tray or frame type panels or blocks, with or without acoustical filling
    • E04B2001/8442—Tray type elements

Definitions

  • the present invention relates to the reverberation control of a theater, and more particularly to a variable reverberation device having a frequency selection and spreading function. It should be understood that the variable reverberation device of the present invention includes a technique for a frequency response controller and a variable diffusion device using a Helmholtz resonator, which can adjust the sound absorption frequency band.
  • Korean Patent No. 10-0936786 (registered on Jan. 6, 2010, "Semi Active Sound Absorption System and Sound Absorption Method Using the Same") corresponds to this.
  • This patent installs a porous sound absorbing plate so that an air layer is located between a wall, and adjusts the distance between a porous sound absorbing plate and a wall, and changes a sound absorption frequency by adjusting the thickness of an air layer.
  • hall-specific reflection sounds occur in the interior space of a building (for example, a hall).
  • a building for example, a hall.
  • a direct sound that is directly transmitted to the listener in the sound source, and there is an initial reflection sound that is reflected by the ceiling or the floor and is transmitted to the listener.
  • reverberation after the initial reflection.
  • This reverberation is determined by the sound absorption characteristics of the hall, and the appropriate reverberation of the hall depends on the sound source (voice, music, etc.).
  • the speech is dry and the voice intelligibility is centered, and the music is appropriately sounded and the music intelligibility is centered.
  • the reverberation is the time when the sound energy is one millionth of its normal state after the sound source is stopped, and the time that the sound pressure level is 60 dB away. This reverberation time depends on the purpose of the various spaces. For example, concert halls, catholic churches, opera houses, conference halls, and television studios have different reverberations, and even concert halls have different reverberations.
  • Direct sound expresses sound quality and affects hearing by volume.
  • the reflected sound is a signal delayed by about 20 ⁇ 50ms, and the direction of incidence and the level are in a functional relationship, reinforcing the direct sound, emphasizing intelligibility, and affecting the hearing.
  • the reverberation sound is omnidirectional, so it arrives in all directions and has a reflection sound after about 50 ms. The reverberation sound deteriorates clarity but has an auditory effect.
  • the general sound absorbing materials include porous sound absorbing materials, resonance sound absorbing materials, and plate vibration absorbing materials. Porous sound absorbing material is excellent in mid and high sound absorption ability, resonance type sound absorbing material is excellent in narrow band sound absorption ability, and plate vibration type sound absorbing material is excellent in sound absorption ability in low frequency band.
  • Porous sound absorbing material is excellent in mid and high sound absorption ability
  • resonance type sound absorbing material is excellent in narrow band sound absorption ability
  • plate vibration type sound absorbing material is excellent in sound absorption ability in low frequency band.
  • each of them has advantages and disadvantages, so one of them is not the best.
  • the technical problem to be solved by the present invention is to provide a variable reverberation device having a frequency selection and spreading function.
  • it is an object of the present invention to provide an active sound absorbing device, a variable reverberation device and a variable diffusion device that can widen the range of change of sound absorption frequency without increasing the displacement of the thickness of the air layer behind the sound absorbing plate.
  • the band of sound absorption frequency is widened.
  • the active sound absorbing device the active sound absorbing device
  • a hollow housing having one side surface open;
  • a variable sound absorbing part inserted into the upper housing part to move inside the housing part to adjust an internal volume of the housing part and to adjust an opening ratio of a perforating part communicating the inside and the outside of the housing part;
  • variable sound absorption unit the variable sound absorption unit
  • a volume and resonator inlet area adjusting plate inserted into the housing and variably adjusting the internal volume and the resonator inlet area of the housing according to a position adjustment;
  • an exposed portion consisting of a plurality of perforations is provided at a position facing the perforated portion of the volumetric and resonator inlet area adjusting plate, the position is adjusted in close contact with the front surface of the volume adjusting plate, and the exposed portion is provided.
  • Opening ratio adjusting plate for adjusting the opening ratio of the above-mentioned perforations
  • the above perforations are a plurality of circular or slit through holes, the diameter is optionally variable, the pitch between the holes is preferably an example that varies depending on the overall size of the enclosure.
  • the aperture control plate is provided in plurality, it is preferable to form the thickness of each aperture control plate and the depth of the exposed portion different.
  • the opening ratio adjusting plate is provided with a plurality of upper exposed portions, it is preferable that the depth of each exposed portion is formed differently.
  • the inside of the gastric enclosure further includes a guide for allowing the variable sound absorbing portion to be moved.
  • the upper guide portion is preferably one of the one formed by attaching a groove, a projection or a separate member provided inside the upper housing portion.
  • the front edge of the volumetric and resonator inlet area adjusting plate further includes a slide guide capable of moving the aperture control plate in close contact with the volume and resonator inlet area adjusting plate.
  • the volumetric and resonator inlet area adjusting plates are provided with protrusions engaging with the upper guide portion when the upper guide portion is in the shape of a groove, and the volume adjusting plate when the guide portion has a structure protruding by the protrusion or attaching a separate member. It is preferable that there is a groove provided in the upper guide part.
  • variable diffusion device One preferred embodiment of the variable diffusion device according to the present invention
  • the surface of the diffuser is formed into a polygon to prevent flutter echoes and maintain IACC values of 0.5 or less without sacrificing sound intelligibility.
  • the polygonal diffuser has a triangular or oval structure and the relationship between the width (a) and height (b) of the diffuser
  • One end of the upper panel is fixed to the rotating rod to serve as a rotating shaft to rotate;
  • a plurality of grooves formed longitudinally by the width and length of the panel so that one end of the panel is fixed to the rotary rod;
  • the plurality of panels are attached to the rotating rod with a height, horizontal and vertical size that can rotate in one direction of the rotating rod, and consists of a bottom and a ceiling surface to fix the rotating rod, and the front part has an open hexahedral shape.
  • a structure accommodating the panel and the rotating rod and emitting a diffused sound to the front portion;
  • the thickness and size of the upper panel is preferably adjusted selectively.
  • the depth of the upper groove is preferably adjusted selectively.
  • the number of the above panels is preferably 2 to 4.
  • the cross section of the rotating rod is polygonal, particularly circular.
  • the material of the panel, the structure and the rotating rod is preferably wood or resin material.
  • One preferred embodiment of the reverberation device according to the present invention is applied to the variable diffusion device described above,
  • the above panel is made of a material that functions as a reflective surface
  • a plurality of sound absorbing surfaces attached to the opposite side of the reflecting surface so as to be integral with the reflecting surface;
  • the sound absorption rate high so as to dry the reverberation of the gastric diffusion space when the sound is negative.
  • the thickness of the plurality of sound absorbing surface is preferably different.
  • variable deflecting device of the present invention can reduce the installation area of the sound absorbing device by selectively changing the opening ratio and the inlet length of each of the sound absorbing plate with the thickness of the air layer behind the sound absorbing plate.
  • the loss rate of the indoor space can be reduced.
  • FIG. 1 is an exploded perspective view of a preferred embodiment of an active sound absorbing device according to the present invention.
  • Figure 2 is an exploded perspective view of another preferred embodiment of the variable sound absorbing portion of the active sound absorbing device according to the present invention.
  • variable sound absorbing portion of the active sound absorbing device is an exploded perspective view of still another preferred embodiment of the variable sound absorbing portion of the active sound absorbing device according to the present invention.
  • FIG. 4 is a partial cross-sectional view of FIG. 3.
  • Figure 5 is a cross-sectional configuration of another preferred embodiment of the aperture ratio adjustment plate of the active sound absorbing device according to the present invention.
  • Figure 6a is a perspective view of a preferred embodiment of the variable diffusion device according to the present invention
  • Figure 6b is a perspective view of the rotating rod of Figure 6a.
  • variable diffusion device 7 is a perspective view of another preferred embodiment of a variable diffusion device according to the present invention.
  • FIG. 9 is a perspective view of yet another preferred embodiment of a variable diffusion device according to the present invention.
  • FIG. 10 is a perspective view of a preferred embodiment of the reverberation adjusting device according to the present invention having the reflection surface and the sound absorption surface attached to FIG. 6.
  • FIG. 11 is a characteristic curve of a sound absorbing surface and a reflecting surface according to the apparatus of FIG. 10.
  • FIG. 12A is a reverberation characteristic curve when reverb is adjusted according to the apparatus of FIG. 10, and FIG. 12B is a diagram illustrating an adjustment state of music data adjusted to sound that is sounded appropriately to sound data adjusted to dry sound.
  • variable sound absorbing part 31 punching part
  • variable diffusion device 41 panel
  • the present invention is directed to a theater reverberation tuning technique.
  • the present invention relates to a frequency response controller and a variable diffusion device using a Helmholtz resonator, which is a kind of active sound absorbing device capable of adjusting the sound absorbing frequency band.
  • Helmholtz resonator which is a kind of active sound absorbing device capable of adjusting the sound absorbing frequency band.
  • the frequency response controller according to the present invention includes an enclosure 10 having one surface open, and a surface side which is located inside the enclosure 10 and faces an open surface from this open surface.
  • the guide portion 20 and the guide portion 20 move along the guide portion 20 to vary the volume inside the enclosure portion 10 and to change the aperture ratio of the perforated portion communicating with the outside space of the enclosure portion 10. It is configured to include a variable sound absorbing portion 30.
  • the housing portion 10 has a structure of a hollow cube with a portion of the side open. In the installed state, this open face of the enclosure 10 faces the opposite side of the wall.
  • the enclosure 10 may be made of various materials such as wood, resin, and is preferably sealed except for this open surface to prevent air from passing through.
  • Equation 1 is the resonant frequency of the Helmholtz resonator.
  • V is the volume of the resonator
  • l is the length of the resonator inlet
  • A is the cross-sectional area of the resonator inlet
  • d is the diameter of the resonator inlet
  • f is the resonant frequency of the Helmholtz resonator.
  • Equation 1 when the resonant frequency of the resonator coincides with the external sound, air is quickly reciprocated into and out of the resonator at the inlet of the resonator, and in the process, the air is rubbed with the tube wall of the resonator to be converted into thermal energy. . Therefore, the sound of the frequency can be absorbed.
  • the inner space of the enclosure portion 10 becomes V in Equation 1, and the interior space of the enclosure portion 10 is formed between the open surface of the enclosure portion 10 and the surface facing the open surface along the guide portion 20. Adjustable by the variable sound absorbing portion 30 to move.
  • the side facing this open side is the side facing the wall.
  • the guide part 20 may be a groove or a protrusion provided inside the housing part 10, and may be formed by attaching a separate member. As can be seen in Equation 1, as the volume of the inner space of the enclosure 10 increases, the resonance frequency is lowered, and as the volume decreases, the resonance frequency is increased.
  • variable sound absorbing portion 30 is provided with a plurality of perforations (31).
  • the perforations 31 may have a circular or slit structure. This perforation part 31 corresponds to the cross-sectional area of the resonator inlet, which is A in this equation (1).
  • These perforations 31 is preferably a 3mm diameter circular through hole, the pitch between the holes is suitable 96mm, but this may vary depending on the overall size of the enclosure (10).
  • variable sound absorbing portion 30 is provided with a volume adjusting plate 32 provided with a punching portion 31, the volume adjusting plate 32 is moved along the guide portion 20, the inside and the volume of the housing 10 The volume of the space formed by the rear surface of the adjusting plate 32 is adjusted.
  • the volume adjusting plate 32 is provided with a projection 36 engaged with the guide portion 20.
  • the protrusion 36 is applied when the guide portion 20 is in the shape of a groove.
  • the volume adjusting plate 32 is attached to the guide portion 20.
  • a groove 36 'to be engaged is provided.
  • the guide part 20 is not necessarily a necessary component, and a state in which the volume adjusting plate 32 having the same size as the open surface of the enclosure part 10 is inserted into the enclosure part 10. Because the volume control plate 32 can be combined without falling or displaced without the action of external force, and when changing the sound absorption frequency (resonance frequency) can be moved to a suitable position by applying force from the outside .
  • the volume adjusting plate 32 is configured to be movable in the x-axis direction.
  • the present invention can widen the band of the sound absorption frequency by changing the volume of the internal space of the frequency response controller (sound absorber), and can be applied regardless of whether the installation place is narrow by miniaturizing the sound absorber.
  • variable sound absorbing portion 30 according to another embodiment of the present invention has a slit structure in which the perforation portion 31 provided in the volume adjusting plate 32 is vertically long, and the perforation portion 31 is formed. It may be formed in the same number as the aperture ratio adjusting plate 34 or the number of aperture ratio adjustment plates 34 or more.
  • the slit-type exposed part 35 having the same shape as the above punched part 31 is also provided in the aperture ratio adjusting plate 34 which is in close contact with the entire surface of the volume adjusting plate 32 and is movable in the left and right (y-axis directions).
  • variable sound absorbing portion 30 uses a volume adjusting plate 32 that can move in the x-axis direction from the inside of the housing portion 10 to the volume inside the housing portion 10.
  • the sound absorption frequency can be changed in accordance with the change of.
  • the slit-type exposed portion 35 provided in each aperture ratio adjustment plate 34 is moved by moving each of the aperture ratio adjustment plates 34 in the y-axis direction.
  • the sound absorption frequency may be changed by adjusting the cross-sectional area of the inlet.
  • the perforations 31 of the volume adjusting plate 32 and the exposed portion 35 of the aperture ratio adjusting plate 34 may be the same in shape and size, and may be different in shape and size as necessary.
  • FIG. 3 is an exploded perspective view of a variable sound absorbing unit according to another exemplary embodiment of the present invention
  • FIG. 4 is a partial cross-sectional view of FIG. 3.
  • the description of the same parts as in the first embodiment is omitted.
  • 3 and 4 the other configuration is the same as that of FIG. 2, but the shape of the aperture adjustment plate 34 is changed to adjust the aperture ratio of the perforated portion 31 of the volume adjustment plate 32, and To adjust the thickness of the perforations 31.
  • the thickness of the perforation part 31 is a value corresponding to the length of the inlet represented by l in this equation (1). That is, the opening ratio adjusting plate 34 may be made thicker than the periphery where the exposed part 35 is formed, and when the exposed part 35 coincides with the perforated part 31, the air flows. The length of the inlet is changed to change the sound absorption frequency.
  • the aperture ratio adjustment plate 34 is provided with a plurality of exposed portions 35a, 35b, and 35c, and the aperture ratio adjustment plate 34 is left and right so as to have a difference in depth of each exposed portion 35a, 35b, 35c.
  • the thickness of the furnace can be configured to be different. Therefore, according to the exposed portions 35a, 35b, and 35c coinciding with the perforated portion 31, l, the inlet length described above, is varied so that the sound absorption frequency can be changed.
  • the present invention described above may be installed on a wall surface, and in particular, may be installed on the entire wall as one of the examples described above, but may be installed in combination of all the above-described embodiments.
  • the combination of all such embodiments makes it easy to finely adjust and adjust the sound absorption frequency, and can be arranged according to the user's taste to obtain an interior effect.
  • the aperture ratio adjusting plate 34 of the variable sound absorbing portion 30 applied to one enclosure 10 may not be all the same shape, and the aperture ratio adjusting plate 34 having the shape of another embodiment described above may be mixed. .
  • variable spreading device of the frequency response controller According to the present invention, the configuration and operation principle of the variable spreading device of the frequency response controller according to the present invention will be described in detail with reference to FIGS. 6 to 12.
  • variable diffusion device 40 makes the attenuation pattern of the reflected sound relative to the direct sound in a given spreading space decay exponentially
  • the surface of the diffuser is formed into a polygon to prevent flutter echoes and to maintain the interaural cross-correlation (IACC) value of 0.5 or less without sacrificing sound clarity.
  • IACC represents the similarity of the sound reaching the listener's left and right ears and is used to confirm the coincidence of the reflected sound on both sides of the venue.
  • the polygonal diffuser has a triangular or elliptical structure and the relationship between the horizontal length (a) and the height (b) of the diffuser is shown in Equation 2.
  • variable diffusion device 40 of the present invention In the variable diffusion device 40 of the present invention,
  • One end of the upper panel 41 is fixed to the rotating rod 42 to serve as a rotating shaft to rotate;
  • a plurality of grooves 43 formed longitudinally by the width and length of the panel 41 so that one end of the panel 41 is fixed to the rotary rod 42;
  • the plurality of panels 41 have a height and horizontal and vertical width that can be rotated in one direction of the rotating rod 42 while being attached to the rotating rod 42, and made of a bottom and a ceiling surface so that the rotating rod 42 is fixed.
  • the front surface has an open hexahedral shape and includes a structure 46 for accommodating the upper panel 41 and the rotating rod 42 and emitting a diffused sound to the front portion.
  • the thickness and size of the upper panel 41 can be arbitrarily changed as necessary.
  • a panel having a thickness of 12 mm, a height of 300 mm, and a width of 140 mm was used.
  • the depth of the upper groove portion 43 into which the upper panel 41 is fitted to the upper rotating rod 42 may be arbitrarily changed as necessary.
  • the rotating rod 42 having a depth of 20 mm is Was used.
  • the number of the upper panels 41 is 2-4.
  • the cross-section of the rotary rod 42 is polygonal, in particular preferably circular.
  • the resonator inlet area in order to make the reverberation of the above diffusion space into a dry sound when the sound is negative, it is preferable to adjust the resonator inlet area appropriately. In addition, it is preferable to adjust the resonator inlet area appropriately so that the reverberation of the above diffusion space is a live sound when the sound is music.
  • the material of the upper panel 41, the structure 46 and the rotating rod 42 in this invention is preferably made of wood or resin material.
  • FIG. 10 shows the sound absorbing surface 44 attached to the front surface of the panel 41 of the variable diffusion device 40 of FIG. 6 and performs the function of the reverberation device 47.
  • the sound absorbing surface 44 may also be attached to the variable diffusion device 40 of FIGS. 7 to 9 to configure the reverberation device 47.
  • the sound absorbing surface 44 used in FIG. 10 may be made of, for example, a polyester sound absorbing material having a thickness of 30 mm. 10 shows a case where the panel 41 itself is used as the reflecting surface 45.
  • FIG. 11 is a graph comparing the characteristics of the suction surface 44 and the reflective surface 45.
  • the data on this graph is FFT data (fast Fourier transformation data), the horizontal axis is the audible frequency band of the FFT data, and the vertical axis is the magnitude of the signal.
  • FFT data fast Fourier transformation data
  • the horizontal axis is the audible frequency band of the FFT data
  • the vertical axis is the magnitude of the signal.
  • Fig. 12 shows an example in which reverberation in the hall for voice and music data is adjusted by the reverberation adjusting device of the present invention.
  • 12 shows an example in which the reverberation is adjusted to the sound of the voice intelligibility center with respect to the voice data
  • the right side shows an example in which the reverberation is adjusted to the sound of the music intelligibility with ringing with respect to the music data.
  • the reverberation adjusting device of the present invention leads to the conclusion that the reverberation can be adjusted according to the listening preference of the listener, and the hall can be used for various purposes according to the event.
  • the phenomenon in which the reverberation decreases almost exponentially is determined, and it is determined that the left side also shows an exponential decrease. It is well known that the ideal reflection pattern attenuates exponentially in the ideal diffusion space, which is believed to correspond to this invention.
  • both side walls are parallel and hard wall echoes can be prevented, a phenomenon in which clapping or footsteps, etc. are reflected by multiple reflections can be prevented, and sound that is shuffled can be prevented.
  • the present invention can selectively change the area of the inlet and the length of the inlet as well as the internal volume of the sound absorbing device, it is possible to precisely adjust the desired sound absorption frequency, so that the sound absorption frequency band can be expanded in the same space do.
  • the implementation area of the present invention can reduce the installation area of the sound absorbing device, and as a result, the loss rate of the indoor space can be reduced.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Architecture (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
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  • Fluid Mechanics (AREA)

Abstract

La présente invention concerne un dispositif à réverbération variable. La présente invention concerne un dispositif à réverbération variable (47) comprenant en outre : une pluralité de panneaux plats (41) qui exécutent des fonctions de surfaces de réflexion ; une tige rotative (42) qui fait office d'axe de rotation de sorte qu'une extrémité du panneau (41) est fixée pour pouvoir tourner ; une pluralité de rainures (43) formées dans la direction longitudinale par la largeur et la longueur du panneau (41) de sorte qu'une extrémité du panneau (41) est fixée à la tige rotative (42) ; une structure (46) qui a une hauteur, une largeur et une longueur pour permettre à la pluralité de panneaux (41) de tourner dans une direction de la tige rotative (42) dans un état de fixation à la tige rotative (42), la structure étant constituée de surfaces de plancher et de plafond de sorte que la tige rotative (42) est fixe, comprenant un côté avant possédant une forme d'hexaèdre sous une forme ouverte, et logeant les panneaux (41) et la tige rotative (42) et émettant une dispersion de sons depuis son côté avant ; et une pluralité de surfaces d'absorption sonore (44) fixées aux côtés opposés des surfaces de réflexion pour être solidaires des surfaces de réflexion.
PCT/KR2014/010959 2013-11-15 2014-11-14 Dispositif à réverbération variable possédant une fonction de sélection et dispersion de fréquence WO2015072780A1 (fr)

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KR102562000B1 (ko) * 2023-02-08 2023-08-01 주식회사 엠디에이건축사사무소 건축용 흡음 적층패널
KR102540296B1 (ko) * 2023-03-16 2023-06-08 주식회사 종합건축사사무소건 건축용 공명소실형 흡음 적층패널

Citations (4)

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Publication number Priority date Publication date Assignee Title
JPS61157996U (fr) * 1985-03-25 1986-09-30
JPH06229039A (ja) * 1993-02-02 1994-08-16 Fujita Corp 室内音響可変装置
JP2006063746A (ja) * 2004-08-30 2006-03-09 Sekisui House Ltd 吸音建具
KR100936786B1 (ko) * 2009-06-15 2010-01-14 한국과학기술원 반 능동형 흡음 시스템 및 이를 이용한 흡음 방법

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Publication number Priority date Publication date Assignee Title
KR100652785B1 (ko) 2005-12-30 2006-12-04 (주)이가종합건축사사무소 가변식 흡음패널
JP2010085511A (ja) 2008-09-30 2010-04-15 Daiken Corp 吸音装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61157996U (fr) * 1985-03-25 1986-09-30
JPH06229039A (ja) * 1993-02-02 1994-08-16 Fujita Corp 室内音響可変装置
JP2006063746A (ja) * 2004-08-30 2006-03-09 Sekisui House Ltd 吸音建具
KR100936786B1 (ko) * 2009-06-15 2010-01-14 한국과학기술원 반 능동형 흡음 시스템 및 이를 이용한 흡음 방법

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KR20160058661A (ko) 2016-05-25
KR101498389B1 (ko) 2015-03-05

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