EP2333181B1 - Élément acoustique pour influencer le son dans une salle - Google Patents

Élément acoustique pour influencer le son dans une salle Download PDF

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Publication number
EP2333181B1
EP2333181B1 EP20090015060 EP09015060A EP2333181B1 EP 2333181 B1 EP2333181 B1 EP 2333181B1 EP 20090015060 EP20090015060 EP 20090015060 EP 09015060 A EP09015060 A EP 09015060A EP 2333181 B1 EP2333181 B1 EP 2333181B1
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EP
European Patent Office
Prior art keywords
room
acoustic component
influencing element
acoustic
sound
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EP20090015060
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German (de)
English (en)
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EP2333181A1 (fr
Inventor
Frank Sander
Susanne Friebel
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Phoneon GmbH
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Phoneon GmbH
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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
    • E04B1/62—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
    • E04B1/86—Sound-absorbing elements slab-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
    • E04B1/8209—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 sound absorbing devices
    • 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
    • E04B2001/8457—Solid slabs or blocks
    • E04B2001/8461—Solid slabs or blocks layered

Definitions

  • acoustical conditions of office and meeting rooms are often unsatisfactory in that the parties to the conversation are not well understood acoustically or the voices are unpleasant.
  • Disturbing room acoustic phenomena in the acoustic signal transmission for example, a perceived as "reverberant" surround sound, low speech intelligibility, the feeling of having to speak with high volume, droning, a high background noise level, penetrating street noise, poorly articulated or undifferentiated speech and music reproduction, unpleasant uneasiness (“Bass bass drone”), mulm sound in the bass range (the opposite of "dry bass”), and room-mode resonances below the Schröder frequency, especially in old-building offices and new-build glass offices.
  • acoustic signal transmission for example, speech (such as in a conversation with a couple or in a group), sounds or music is transmitted.
  • sound is transmitted to one or more sound receivers (eg in meetings).
  • the entry or discharge of Sound through room openings or incompletely sound-isolated room boundaries, such as street noise through windows, noise caused by climatic faults are examples of sources and sinks of sound, which also influence the room acoustics.
  • Distinctive features of the local conditions of rooms for which a pleasant room acoustics are desired may be: separated or totally or partially connected rooms, fully or partially closed rooms with or without - even closable - openings (such as doors, windows, passageways). Furthermore, the space may be in front of an outdoor wall (e.g., courtyard).
  • an outdoor wall e.g., courtyard
  • Possible ways of communicating speech are word-of-mouth, mouth-to-mouth and speaker-to-ear, with or without additional telecommunications equipment (eg speakerphone), with or without direct or indirect sound recording equipment (eg dictation machines, studio Recording equipment, iPods, PCs), with or without electrical acoustic amplifiers (eg microphone + amplifier + loudspeaker, sound system).
  • additional telecommunications equipment eg speakerphone
  • direct or indirect sound recording equipment eg dictation machines, studio Recording equipment, iPods, PCs
  • electrical acoustic amplifiers eg microphone + amplifier + loudspeaker, sound system.
  • Correlated physical quantities for various aspects of room acoustics problems include: a long reverberation time (in the entire frequency range or at single or multiple frequencies), typically measured as RT 60 ; a strongly frequency-dependent response of the room to an excitation, measured as a frequency response in dB over the frequency; well-differentiated room modes, which are characterized by room sizes or mode frequencies and their higher harmonics.
  • Another variable is the frequency dependence of the group delay (negative derivative of the phase of the transfer function after the frequency). It causes the dissipation of pulses due to different velocities of sound for the different frequencies present in the spectrum of the pulse.
  • part of the frequency dependence of the group delay is mandatory (the so-called minimum group delay).
  • the additional part of the group runtime is measured as excess / excess group delay (excess group delay). is also important for the listening experience and can take very large values. In contrast to the former part, it can also be changed and optimized independently of additional absorption.
  • the clarity i. the "amount of sound that arrives in the first 50ms" measured with the measure of clarity C50 in dB over the frequency is another important acoustic parameter.
  • Further correlated measurement / evaluation parameters are the (music) clarity measure C80, the bass ratio BR, the reverberation times RT 60 (measured eg as EDT, T10, T20, or T30), the center of gravity time Ts, the clarity measure D50, the speech transmission index STI and RASTI, and the average loss of consonants ALCONS.
  • the reverberation time RT 60 is understood to mean the time interval in which the sound pressure in a room drops to the one thousandth part of the initial value of the sound pressure when the sound source is switched off momentarily, which corresponds to a level reduction of 60 dB.
  • this size is in practice eg by measuring the time duration of the drop -5 dB to -35 dB and extrapolating the time period to a drop of 0 dB to -60 dB determined (factor 2), which gives the reverberation time T30 and represents the mean time period of the waste.
  • the "early cooldown" EDT is analogously determined from the drop of the sound pressure from 0 dB to -10 dB and corresponding extrapolation (factor 6), which therefore detects the early part of the decay.
  • sound absorbers for influencing the room acoustics are commonly known. Although these sound absorbers are very different in the prior art and based on different mechanisms of action, they have the property that the sound is absorbed approximately in proportion to the area presented to him. As a result, the expert expects that there is a significant reduction in the effectiveness of sound absorbers, if one with a sound-impermeable and non-oscillatory, also known as reverberant plate or a corresponding object covers or wrapped with a thin layer (fabric / perforated plate) with degree of opening ⁇ 100%.
  • a sound-impermeable and non-oscillatory also known as reverberant plate or a corresponding object covers or wrapped with a thin layer (fabric / perforated plate) with degree of opening ⁇ 100%.
  • wall panels made of fiber material (with a maximum thickness of 10 cm), which are flush mounted on the wall and ceiling sails (with the appropriate installation effort required).
  • acoustic resonator which may be damped or unattenuated (eg Helmholtz resonator), as well as the primary use of excitations of one or more discrete oscillations including a resilient and oscillating suspension, which may be damped or unattenuated (eg plate vibrator). It requires the tuning of resonant cavities, vibrating solids or angles on or with special consideration of spatial natural frequencies.
  • the document DE 198 39 975 A1 discloses a component with a shell of flexible material such as an air mattress, which is filled with sound absorbing material, wherein the shell may be formed reinforced so that the component is used as a partition wall.
  • the present invention is based on the object of the present invention to provide an acoustic component which has a good efficiency in the bass range (below about 200 Hz, especially below 100 Hz) and in a simple manner stable and protected in one Room (for example, a conference or meeting room) can be introduced.
  • the acoustic component should also reduce room resonances and / or the frequency dependence of the group delay.
  • the acoustic component according to the invention comprises an influencing element of open-pored material; and a jacket which at least partially surrounds the influencing element.
  • a protection of the influencing element from dust and other impurities is ensured by means of the sheath, which could clog the pores of the material of the influencing element.
  • the usually mechanically sensitive material of the influencing element is protected from contact and resulting damage.
  • the acoustic component according to the invention can be easily introduced into a room so as to improve the room acoustics as a retrofit object with low installation costs.
  • Sound waves in the bass range are for the open-pored material essentially an incident wind, which is decelerated in the openings or gears, undergoes a phase shift and loses a (frequency-dependent) part of its kinetic energy. This is done, inter alia, by minimal deformation of the open-pored material.
  • the influencing element for influencing sound in particular for absorbing, sound with a frequency of less than 200 Hz, in particular of sound in the frequency range of 25 Hz to 100 Hz, be suitable. This leads to an advantageous for medium-sized rooms damping.
  • the volume of the open-pored material is in the range of 10,000 cm 3 to 1,000,000 cm 3 , preferably 20,000 cm 3 to 500,000 cm 3 , most preferably 50,000 cm 3 to 200,000 cm 3 .
  • This also leads to a favorable for medium-sized rooms (with dimensions in the range of a few meters edge length) influencing the room acoustics, without an excessively large volume of space is occupied by the acoustic component.
  • the volume necessary for influencing the acoustics can also be divided into a plurality of acoustic components according to the invention, so that a plurality of such components are introduced into a room and arranged, for example, in different spatial areas, which can also lead to improved damping of room-mode resonances.
  • the sheath may comprise a fabric and / or at least one perforated plate, in particular at least one perforated plate, grid or expanded metal, and / or the sheath may have one or more air-impermeable regions, in particular a fixed upper side and / or a solid lower side ,
  • a jacket is provided which has no significant effect on the effectiveness of the influencing element in the bass region and which is permeable to air.
  • a material for the casing is permeable to air and mechanically stable, so that it does not come into contact with the influencing element when the acoustic component is used as intended, in particular when it is attached at a distance from the influencing element.
  • a perforated plate, mesh or expanded metal can also be used together with a fabric and serve to support and stabilize the fabric.
  • the sheath is arranged at a distance from the influencing element, wherein this distance at least 1 mm, preferably 1 mm to 10 cm, most preferably 5 mm to 5 cm.
  • this distance at least 1 mm, preferably 1 mm to 10 cm, most preferably 5 mm to 5 cm.
  • the influencing element can be integrated, for example, in a piece of furniture with correspondingly formed side walls.
  • the sheath may, for example, comprise a fabric.
  • the underside may be made heavy (eg, made of metal) or weighted down by weights to reduce the height of the center of gravity of the acoustic component, increasing its stability.
  • a light influencing element made of open-pore material such as Basotect® with a density of 8-11 kg / m 3 ).
  • a respective plate as a solid top and bottom, which project beyond the edge / the edges of the influencing element, they can simultaneously serve as a fixture for mounting a substance with a distance from the influencing element for the protection of the influencing element.
  • the acoustic component can furthermore have a frame which serves for fastening to the casing, in particular at a distance from the influencing element, and / or which serves as protection for edges of the influencing element.
  • a substance can be clamped as a shell on the frame.
  • the frame may be made of wood, for example.
  • edges of the frame may be formed at least partially with an acoustic inlet.
  • sound waves can also enter the edges of the frame, in particular be bent into it.
  • the edges especially the low-frequency sound waves are also bent laterally into the acoustic component.
  • the influencing element can be designed as a cross-sectional area with a circular, oval, triangular, square, rectangular, pentagonal or hexagonal cross-section or with another regular polygon, in particular as a cylinder, or the influencing element can be designed as a rotation body, in particular as a sphere.
  • Sheath shaped interference elements shaped like this can be easily integrated into a room by e.g. how to place a speaker in a corner of a room.
  • acute-angled edges are to be avoided. This can be done for example by "neck" of such an edge, so that from two edges, each with a blunt (greater than 90 °) angle are formed.
  • all angles are preferably greater than 45 ° (for example all equal to 60 °), ie in particular not like a prism with a right-angled, isosceles triangular base area with angles of 90 °, 45 °, and 45 °.
  • the influencing element has a thickness of at least 10 cm, wherein the thickness relative to the width of the influencing element more than 0.5 times the width, most preferably at least 0.75 times the width, wherein the thickness is defined as the smallest spatial extent of Influencing element and the width is defined as the smallest thickness perpendicular to the extent.
  • This causes a minimum volume of 5cm x 5cm x 5cm, preferably 10cm x 10cm x 10cm, and a volumetric (i.e., non-surfaced) design, but may be rod-like. There is no assumption about a particular shape, e.g. made cylindrical. Since the influence (in particular the absorption) in the bass region depends on the volume of the influencing element, a compact arrangement of the volume with a high volume-to-surface ratio is preferred.
  • edge elements of the frame can extend at least partially along edges of the cylinder. This has the advantage that the edges of the influencing element are protected from damage by the corresponding parallel edges of the frame. Furthermore, (in particular open) edges of the frame serve as holding and / or guide rails for the influencing element (eg during assembly).
  • the acoustic component may further include an erection device, in particular adjustable feet, for placement in a room or a hanging device, in particular fastening elements for hanging in a space on strings, wires or rods.
  • an erection device in particular adjustable feet
  • a hanging device in particular fastening elements for hanging in a space on strings, wires or rods.
  • the open-pore material may comprise open-celled melamine resin, in particular Basotect®, or an open-celled polyuretan flexible foam, in particular Bayflex, Elastoflex, or Elastofoam, or open-celled polyether, or open-celled polyester.
  • open-celled melamine resin in particular Basotect®
  • an open-celled polyuretan flexible foam in particular Bayflex, Elastoflex, or Elastofoam
  • open-celled polyether or open-celled polyester.
  • an acoustically effective material is also used in the bass range.
  • a room in particular a medium-sized room with dimensions in length and width in the range of 3 m to 10 m, which comprises an acoustic component according to the invention or several acoustic components according to the invention, wherein each influencing element of the acoustic component (s) in a distance of at least 2 cm, preferably from 2 cm to 100 cm, or to one-eighth of the largest dimension of the room in terms of length, width and height, most preferably from 5 cm to 65 cm, of at least one wall of the room ,
  • a room particularly affects the acoustics in the bass range and is e.g. as a meeting room well suited.
  • a said space which may further comprise at least one planar influencing element, which may be arranged in particular on a wall of the room.
  • Areal is defined so that the width is more than four times the thickness, wherein the thickness is defined as the smallest spatial extent of the influencing element and the width is defined as the smallest thickness perpendicular to the extent.
  • the space can accordingly also comprise an additional area-shaped influencing element, e.g. a surface-trained absorber element according to the prior art (panel), which is mounted on the wall and in the middle and / or upper frequency range is particularly effective.
  • an additional area-shaped influencing element e.g. a surface-trained absorber element according to the prior art (panel)
  • panel e.g. a surface-trained absorber element according to the prior art (panel)
  • the perceived effect can be significantly greater in the synergistic interaction than would be expected by simple addition of the technically measured effects of the individual acoustic elements.
  • the effect is caused, inter alia, by the fact that high levels at bass frequencies (in comparison to a similar room without acoustic elements according to the invention) are reduced in the said space, causing irritation of the nerve cells responsible for high and middle frequencies at the beginning of the basilar membrane of the human ear Bass frequencies are reduced, their sensitivity is increased and thus lowers the perception threshold for high and medium frequencies to lower levels (unmasking).
  • the inverse sensitivity change an increase in the perception threshold for adjacent, especially higher frequencies (masking), is known as the basis for high-efficiency lossy compression algorithms for music files (such as MP3).
  • the lower levels in the high and medium frequency ranges which are first made audible by this increase in sensitivity, are corrected by the additional absorber for disturbing reverberation effects and thus brought to bear as perceivable and well-differentiated subtleties.
  • a space-use-specific balance between reverberation in the midrange and treble range can be selected by selecting suitable size ratios. and echo sensation is relevant) and the reverberation in the bass range (which is primarily relevant for pulse precision, drone and enveloping sensation) are set.
  • the ratio between the sum of the surfaces of the acoustic elements opened to the room and the volume of the especially in the bass range effective acoustic element according to the invention can be used.
  • an acoustic component which includes the introduction of an acoustic component according to the invention in a walk-in room, wherein in particular the room may be an office, conference or meeting room and / or wherein in particular the dimension of the room in terms of length and width can be in the range of 3 m to 10 m.
  • a further development of the use according to the invention consists in that a positioning of the acoustic component can take place with a distance from at least one wall of the room, wherein each influencing element of the acoustic component (s) at a distance of at least 2 cm, preferably from 2 cm to 100 cm or to one-eighth of the largest dimension of the room in terms of length, width and height, most preferably from 5 cm to 65 cm, of at least one wall of the room.
  • FIG. 1 an acoustic component 10 according to the invention is illustrated according to a first embodiment of the present invention.
  • the acoustic component 10 comprises an influencing element 1 made of open-pored material and a sheath 2 which at least partially surrounds the influencing element.
  • the acoustic component according to the invention is in this embodiment with a fiber-free influencing element made of open-pore foam (for example Basotect® from BASF).
  • the casing 2 is made of an air-permeable material or perforated plates.
  • FIG. 2 a second embodiment of the acoustic component 10 according to the invention is shown.
  • the acoustic component according to the invention is provided in this embodiment with a fiber-free influencing element 1 made of open-cell foam and has an additional functionality.
  • the acoustic component according to the invention has an additional office functionality in the form of a piece of furniture as a storage surface with dimensional stability and cleaning ability, and it meets by the choice of suitable material (as in the first embodiment) fire safety standards.
  • a frame 3 is provided, on which the fabric 2 of the sheath is stretched. By the frame 3, the material 2 is kept at a distance from the material of the influencing element 1, so that an adapted cross-section is ensured to avoid weakening the effectiveness of the absorber.
  • a fixed top (cover) 4 which can be used as storage or footprint (for example, office utensils).
  • This reverberant cover changes the effectiveness of the influencing element 1 only slightly. In particular, sound is diffracted around the edges into the acoustic element, especially for wavelengths substantially greater than the dimensions of the fixed lid.
  • Another special feature of this embodiment is the formation of the edges of the frame with an acoustic inlet 5, which in FIG. 3 shown in detail.
  • Wavefronts of a sound wave for example, from the top (arrow A) impinge on the inventive acoustic component, generate secondary waves (shown in a circle), are thus bent at the edges of the frame 3 and meet behind the storage protection 4 side (arrow B), in particular by the acoustic inlet in the edges, on the influencing element 1.
  • the drawn lines and circles each have the same speed of sound and do not show the maxima or minima of the sound wave (whose distance is greater than the dimensions of the influencing element).
  • the frame 3 also serves as a rail-shaped support for the influencing element 1 and at the same time simplifies its insertion during assembly.
  • the execution of the frame in the form of two spaced rails along an edge also gives a total outwardly obtuse angle.
  • the small contact surface of the frame only gives an insignificant spatial coverage of the influencing element.
  • FIG. 4 shows a graph for the volume dependence of the clarity measure C50 with an inventive acoustic component. Measurement of C50 was carried out in a specially equipped test room with limited clarity, and the measurement was evaluated according to IS03382 with 1/3 octave bands. Shown is the 125Hz band. The quadratic measured values were obtained with cube-shaped influencing elements (edge ratio 1: 1: 1), while the circular measured values were obtained with cuboid influencing elements (edge ratio 1: 4: 1). It can be seen that the clarity (substantially independent of the shape) increases approximately linearly with the volume of the influencing element.
  • FIG. 5 shows a graph showing the reduction of the reverberation time as a function of the sound frequency with an inventive acoustic component, wherein the reverberation time RT 60 as "early decay time” (EDT) is measured.
  • EDT early decay time
  • the test object F is an acoustic component according to the invention.
  • a further measurement only with the influencing element (foam) from this test object F shows in comparison no significant difference compared to the measurement with test object F (ie with sheathing).
  • the effectiveness of the acoustic component according to the invention is not significantly limited by the sheath.
  • FIG. 6 shows a graph showing the clarity measure C50 as a function of the frequency in a room both without and with an inventive acoustic component (test object F).
  • This graph shows the increased clarity of the speech in the low frequency range as well as in the main frequency range for speech intelligibility (about 1 to 2 kHz), in which in particular the articulation of consonants takes place.
  • FIG. 7 shows a graph showing the reduction of the transit time frequency dependence by an inventive acoustic component.
  • the test object P consisted of a cuboid made of Basotect® with dimensions of 50cmx50cmx125cm.
  • the determination of the excess group delay shown was carried out with the audio engineering software ARTA.
  • the brain evaluates sound events in windows of 50 ... 80ms. Therefore, an additional group delay for certain frequency bands of 160ms for the auditory sensation is large and the test object leads to an impressive improvement.
  • FIG. 8 shows a graph showing the frequency dependence of the reverberation time T30 with and without a test object according to the invention.
  • Test object P consisted of a basalt of Basotect® with dimensions of 50cmx50cmx125cm without sheath, and the determination of the acoustic parameter T30 according to ISO3382 was in 1/1 octave bands with extended frequency range 63Hz-8kHz. Here is especially the high efficiency in the bass range.
  • FIG. 9 shows a graph showing the neutrality of the sheath of another test object on the reverberation time T30.
  • the test object F consisted of an acoustic component with an influencing element (filling) made of foam with dimensions of 35cmx35cmx100cm.
  • Test object L consisted of the filling of the test object F (ie without sheathing).
  • the determination of the acoustic parameter T30 according to ISO3382 was carried out in 1/1 octave bands with extended frequency range 63Hz-8kHz. Clearly visible is the low to nonexistent influence of the envelope.
  • a limited space is an acoustic resonator in which acoustic modes form. These are excited by sound introduced into the room. On the walls, sound pressure maxima and sound velocity minima are formed by the interference of incident and reflected sound. A quarter wavelength away from the walls, the sound velocity has a (first) maximum for each frequency.
  • the discrete or also the continuous smeared spatial modes are attenuated and widened, and the frequency dependence of the group delay is reduced.
  • the sound-influencing elements made of open-pore foam are externally and / or internally deformed by the incident and penetrating acoustic air movement.
  • sound energy kinetic energy and / or local air pressure deviations
  • heating of the flowing air itself may occur. by the passage of the pores and by the swirling when flowing around. As far as the converted energy is immediately transformed back into sound energy, there is a phase shift or maturity change.
  • the introduction of a distance from the space boundary surfaces also makes it possible to use the sound velocity (which disappears directly on the wall or is very low) for increased coupling into the sound-influencing element.
  • the interaction between sound wave and influencing element is determined not only by the size of the influencing element but also by the sum of half wavelength ("size of the sound quasiparticles") and influencing element. This results in an increasing effectiveness in the bass range, in which the half wavelength can be much larger than the influencing element. In this case, a sufficient capacity of the influencing element for the large air flow of the sound in the bass range is necessary.
  • the ear-brain system detects acoustic events with a temporal resolution of 50 ... 80ms. Sound energy present within this interval is perceived as belonging to the same event. Sound energy present after this time is perceived as another acoustic event. Due to the reduced reverberation time, the proportion of the sound energy of a sound event in the first perception window increases in proportion. This increases the clarity and speech intelligibility. In rooms in which the sound is reflected back and forth several times within the 50 ... 80ms relevant for the ear-brain system, the local influencing element becomes effective several times. In such rooms, the effect is perceived as an effective reduction of the reverb. In the bass range, noises such as car engine noise and noises from large vibrations penetrate into the room.
  • the clarity gain C50 increases in the inventive acoustic component proportional to the volume of the influencing element.
  • the reverberant partial cover as well as the stabilizing and protective sheathing / sheath do not reduce the effect relevantly (diffraction effect for low and medium frequencies), in particular if they are arranged at a distance from the influencing element.
  • the inventive introduction of sound-influencing elements in the room has a dual function, namely for acoustic influence, for example.
  • acoustic influence for example.
  • a highly effective broadband effect is achieved down to the bass range (below 200 Hz, in particular 25 Hz to 100 Hz) by using open-pore material in the elements, e.g. in particular open-celled melamine resin (for example, in particular Basotect® from BASF), but also open-celled polyuretan flexible foams (for example Bayflex, Elastoflex, Elastofoam) or open-cell polyether, and u.U. also open-celled polyester.
  • open-pore material for example, in particular open-celled melamine resin (for example, in particular Basotect® from BASF)
  • open-celled polyuretan flexible foams for example
  • the acoustic component according to the invention comprises a covering / rebuilding of the foam, e.g. for the purpose of protection against soiling, impact, damage, visual enhancement (including coating, also with additional acoustic effectiveness), e.g. In particular surrounded with a frame and covered with air-permeable (in particular insensitive) fabric.
  • perforated sheets / expanded metal mesh can be used.
  • the acoustic component according to the invention enables a freestanding installation or suspension of the elements. Due to the mobile adjustability of the elements such as adjustable furniture (eg table, chair, flower stand, loudspeaker box, wastebasket etc) it is therefore suitable eg for retrofitting in the office and living area with simple installation.
  • adjustable furniture eg table, chair, flower stand, loudspeaker box, wastebasket etc
  • the acoustic component according to the invention uses a large volume of the material of the influencing element (which is not necessarily applied flatly).
  • a compact arrangement of the volume as a cube, cuboid or cylinder with a high volume-to-surface ratio (no acute-angled edges, no two-dimensional layout) is preferred.
  • the installation or suspension of the acoustic component according to the invention takes place in particular in room corners, but at a distance from the wall (2 cm to 100 cm or 2 cm to room length / 8), such as a wastepaper basket or a flower or a telephone corner table.
  • the frame (also with an open edge as an additional acoustic inlet), serves for edge protection and as a stringing frame in one, as well as a rail-shaped support of the influencing element.
  • a flat, closed, solid top serves as protection and storage.
  • a suspension may be on threads / wires or bars, which may also be transparent.

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  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Claims (14)

  1. Élément acoustique pour influencer le son dans un espace, comprenant :
    un élément d'influence en matériau à pores ouverts ;
    et
    une gaine qui entoure au moins en partie l'élément d'influence ;
    étant précisé que l'élément acoustique est conçu pour pouvoir être posé de manière mobile et indépendante ;
    caractérisé en ce que l'élément d'influence présente une épaisseur d'au moins 10 cm, étant précisé que l'épaisseur par rapport à la largeur de l'élément d'influence représente plus de 0,5 fois la largeur, que l'épaisseur est définie comme la plus petite extension spatiale dudit élément d'influence et que la largeur est définie comme la plus petite extension perpendiculaire à l'épaisseur ; et
    en ce que le volume du matériau à pores ouverts est située dans la plage de 10.000 cm3 à 1.000.000 cm3, de préférence de 20.000 cm3 à 500.000 cm3, d'une manière tout à fait préférée de 50.000 cm3 à 200.000 cm3.
  2. Élément acoustique selon la revendication 1, étant précisé que l'élément d'influence est apte à influencer le son d'une fréquence de moins de 200 Hz, en particulier le son dans la plage de fréquence de 25 Hz à 100 Hz.
  3. Élément acoustique selon l'une des revendications précédentes, étant précisé que la gaine comprend un tissu et/ou au moins une plaque perforée, en particulier au moins une plaque perforée, un treillis ou un treillis étiré, et/ou que la gaine présente une ou plusieurs zones imperméables à l'air, en particulier une face supérieure solide et/ou une face inférieure solide.
  4. Élément acoustique selon l'une des revendications précédentes, qui comprend par ailleurs un cadre pour la fixation de la gaine, en particulier avec un espacement par
    rapport à l'élément d'influence et/ou comme protection pour les bords de ce dernier.
  5. Élément acoustique selon la revendication 4, étant précisé que les bords du cadre sont pourvus au moins en partie d'une entrée acoustique.
  6. Élément acoustique selon l'une des revendications précédentes, étant précisé que l'élément d'influence est conçu avec une section transversale ronde, ovale, triangulaire, carrée, rectangulaire, pentagonale, hexagonale ou d'une autre forme polygonale régulière, en particulier sous la forme d'un cylindre, ou que l'élément d'influence est conçu comme un corps de révolution, en particulier une boule.
  7. Élément acoustique selon l'une des revendications précédentes, étant précisé que l'épaisseur, par rapport à la largeur de l'élément d'influence, représente au moins 0,75 fois la largeur.
  8. Élément acoustique selon l'une des revendications précédentes, avec un élément d'influence conçu comme un cylindre, combinée avec la revendication 4 ou 5, étant précisé que les bords du cadre s'étendent au moins en partie le long des bords du cylindre.
  9. Élément acoustique selon l'une des revendications précédentes, qui comprend par ailleurs un dispositif d'appui, par exemple des pieds, pour être posé dans un espace, ou un dispositif de suspension, en particulier des éléments de fixation pour être suspendu, dans un espace, à des cordons, des fils ou des baguettes.
  10. Élément acoustique selon l'une des revendications précédentes, étant précisé que le matériau absorbant comprend une résine mélamine à pores ouverts, en particulier du Basotect®, ou une mousse souple de polyuréthanne à pores ouverts, en particulier du Bayflex, de l'Élastoflex ou de l'Élastofoam, ou un polyéther à pores ouverts ou un polyester à pores ouverts.
  11. Espace comprenant un élément acoustique ou plusieurs éléments acoustiques selon l'une des
    revendications précédentes, étant précisé que chaque élément d'influence du ou des éléments acoustiques est disposé à une distance d'au moins 2 cm, de préférence de 2 cm à 100 cm ou jusqu'à un huitième de la plus grande dimension dudit espace en longueur, en largeur et en hauteur, de manière tout à fait préférée de 5 cm à 65 cm, d'au moins une paroi de l'espace.
  12. Espace selon la revendication 11, comprenant par ailleurs au moins un élément d'influence qui a une forme plate et qui est disposé en particulier sur une paroi dudit espace.
  13. Utilisation d'un élément acoustique, comprenant :
    la mise en place d'au moins un élément acoustique selon l'une des revendications 1 à 10 dans un espace accessible,
    étant précisé que ledit espace est constitué en particulier par un bureau, une salle de conférence ou une salle de réunion, et/ou
    qu'en particulier les dimensions dudit espace, en longueur et en largeur, sont situées respectivement dans la plage de 3 m à 10 m.
  14. Utilisation d'un élément acoustique selon la revendication 13, comprenant par ailleurs :
    le positionnement du ou des éléments acoustiques à une certaine distance d'au moins une paroi de l'espace, étant précisé que chaque élément d'influence du ou des éléments acoustiques est disposé à une distance d'au moins 2 cm, de préférence de 2 cm à 100 cm ou jusqu'à un huitième de la plus grande dimension de l'espace, en longueur, en largeur et en hauteur, de manière tout à fait préférée de 5 cm à 65 cm, d'au moins une paroi de l'espace.
EP20090015060 2009-12-04 2009-12-04 Élément acoustique pour influencer le son dans une salle Active EP2333181B1 (fr)

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Application Number Priority Date Filing Date Title
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EP2333181B1 true EP2333181B1 (fr) 2013-03-20

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021109555A1 (de) 2021-04-15 2022-10-20 Phoneon Gmbh Schallabsorber mit Luftreiniger

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2610695A (en) * 1946-08-27 1952-09-16 Grue Olav Ebbesen Supporting means for acoustical absorbers
DE19516819C2 (de) * 1995-05-08 1999-05-27 Metzeler Schaum Gmbh Schalldämpfungsvorrichtung
DE19839975B4 (de) 1998-09-02 2004-03-18 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Bauteil zur Schallabsorption, nach Art einer Luftmatratze
DE10214778A1 (de) * 2001-04-04 2003-02-13 Ver Holzbaubetr E Wilhelm Pfal Schallabsorbierendes Paneel
DE202006000201U1 (de) * 2006-01-09 2006-03-30 Knauf Gips Kg Raumelement zur decken- oder wandseitigen Befestigung
DE102008000500A1 (de) * 2008-03-04 2009-09-10 Voith Patent Gmbh Schallabsorbereinheit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021109555A1 (de) 2021-04-15 2022-10-20 Phoneon Gmbh Schallabsorber mit Luftreiniger

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