WO1984003982A1 - Plaque de regulation acoustique - Google Patents

Plaque de regulation acoustique Download PDF

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Publication number
WO1984003982A1
WO1984003982A1 PCT/JP1984/000153 JP8400153W WO8403982A1 WO 1984003982 A1 WO1984003982 A1 WO 1984003982A1 JP 8400153 W JP8400153 W JP 8400153W WO 8403982 A1 WO8403982 A1 WO 8403982A1
Authority
WO
WIPO (PCT)
Prior art keywords
sound
sheet
speaker unit
adjustment plate
plate
Prior art date
Application number
PCT/JP1984/000153
Other languages
English (en)
Japanese (ja)
Inventor
Toshio Mayumi
Original Assignee
Shin Nippon Core Co Ltd
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
Priority claimed from JP4615883U external-priority patent/JPS59156300U/ja
Priority claimed from JP3223684U external-priority patent/JPS60143496U/ja
Application filed by Shin Nippon Core Co Ltd filed Critical Shin Nippon Core Co Ltd
Publication of WO1984003982A1 publication Critical patent/WO1984003982A1/fr

Links

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
    • 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

Definitions

  • the present invention relates to a sound adjusting plate made of a hollow laminated structure, and does it come out from the lower part or the rear part of the speaker unit? !
  • the present invention relates to an acoustic adjustment plate for reducing an adverse effect of a sound.
  • a support base such as a lenger, concrete board, or ⁇ -book in order to absorb the vibration energy transmitted from the sound source to the floor.
  • the speaker unit is placed on it and used.
  • the greater the quality of this support the greater the attenuation of resonance phenomena.
  • the size and mass of the support are limited, and the support is not always satisfactory.
  • sound waves emitted from the rear of the speaker unit are reflected by the rear wall of the listening room, interfere with the sound waves from the front of the speaker unit, and generate sound. It causes. For this reason, the installation board, plywood, etc. may be placed at the rear of the speaker unit, or the steel board or honeycomb may be used.
  • Panels with a core as the core and sandwiched by perforated plates on the front and back are placed on the rear side of the speaker unit and on the side, etc. Sound waves emitted from other than the front of the box are absorbed as much as possible to reduce the adverse effects of the sound. However, such a panel can only absorb sound waves that are polarized in either the middle or low frequency range, so that an appropriate sound absorbing effect can be expected. Flaws and transparent sound
  • An object of the present invention is to provide a light-weight sound-adjusting plate which eliminates the drawbacks of the conventional speed support plate or sound-absorbing plate as described above, and is lightweight, has excellent sound-absorbing characteristics, and is inexpensive. The purpose is.
  • a roll made of paper is laminated between a raised or planted porous force sheet and an air-impermeable shield when a lead thin plate is used, and an acoustic adjustment plate is formed. It was done. As a result, while coming out of the speakers J.2, J., and the boat, it absorbs the low-frequency sound waves and dampens the sound energy transmitted from the bottom of the unit to the floor (Pi The sound characteristics of the stereo listening room can be improved.
  • the size of the roll core can be selected as appropriate, but as a result of the experiment, the cellulos is about 14 m, the thickness is about 20 to 90 steel, and preferably 50 to 90 jobs. Is adopted.
  • the porous cover sheet is a For example, a brushing cloth, a flocking cloth or a felt having a value of air permeability of 5 15 cc / CJB'sec is suitable for a Frazier type testing machine.
  • the impermeable sheet may be made of a material that does not have a resonance frequency in a frequency range where sound can be lashed, for example, a lead plate or iron having a thickness of 0.3 m or more.
  • a thermoplastic plastic sheet containing iron powder is suitable.
  • the porous cover which is a component of the acoustic adjustment plate, has a relatively high absorption rate for sounds in the high frequency range, and the roll core cell has a relatively low absorption rate for sounds in the low frequency range.
  • each of the cells has an average high absorption rate over the entire sound range as a whole. .
  • the roll core and the impermeable sheet work as a vibration damping material and prevent sound (especially low sound) from propagating to the wall or floor.
  • the impermeable sheet has the effect of sound reflection and the effect of the irregular reflection of the sound of the power part.
  • this acoustic adjustment plate can obtain excellent effects in any of clarity of sound, sound image localization, and lingering sound, and solves the above-mentioned conventional problems. If the air permeability of the cover sheet is low, the sound will be muffled and a favorable effect cannot be obtained.
  • FIG. 1 is a front view of a preferred acoustic adjustment plate according to the present invention, with a part of the sound adjustment plate being peeled off
  • FIG. 2 is a longitudinal side view of the periphery
  • FIG. 3 is a plan view of a used state
  • Fig. 4 is a cross-sectional view taken along line IV-IV in Fig. 3
  • Fig. 5 is a sound absorption characteristic diagram.
  • FIG. 1 is a front view showing one of the plate-like layers [porous force sheet 12] of the acoustic adjustment plate 10 peeled off
  • FIG. 2 is an enlarged sectional view.
  • the acoustic adjustment plate 10 has a roll core 11 made of paper as a core material, a porous force sheet 12 disposed as one plate-like layer, and an improper use as the other plate-like employment. It is a hollow matrix structure in which permeable sheets 13 are arranged and stacked.
  • the roll core 11 used as the core material is cell size 14 fiber with a thickness of 90 flsa and 50 jobs.
  • the force sheet 12 uses, for example, a ventilated brushed cloth such as a french pile, and closes one opening surface 14 of the door core. As shown in Table 1 below, felt may be used instead of the brushed cloth.
  • the roll core 11 was formed by bonding the roll core elements 16 of each stage to a phase at a portion 20 to be laminated. As a result, cells of different sizes are formed for each element, that is, original cells 18 and gaps 19 are formed. Adhesive is not applied to the part 21 of each element 16 where the adjacent cell 18 contacts.
  • the acoustic adjustment plate is disposed below and behind the speaker unit 26 in the listening room 25. Adjusted sound ⁇ 10
  • the thickness of the core is 90 Nana, and the sound hairpin adjustment plate 30 arranged behind and on the side is around 50 Sir.
  • the acoustic adjustment plates 10 and 30 shown in the above embodiments exhibit an average sound absorbing effect over the entire sound range. That is, a large volume cell 18 exhibits a relatively high sound absorption rate for low-range sounds, and a small volume gap 19 exhibits a relatively high sound absorption rate for mid-range sounds.
  • the power sheet 12 of the breathable brushed cloth shows a relatively high sound absorption rate for sounds in the high frequency range. Therefore, the above three characteristics are synthesized, and an average sound absorption coefficient can be obtained over the entire sound range.
  • Fig. 5 shows the sound absorption coefficient of the sound conditioner (sample area 9.4) used as the speaker support, and the residual room method determined by JISA 1409-19797. It shows the results of the measurements.
  • the roll Your 11 works as a vibration damping material, it prevents the vibration of the sound (especially bass) from propagating to the floor or transmitting to the floor. Has a vibration damping effect.
  • one open surface of the roll core is closed with an impermeable sheet 13 made of a lead plate, it has an excellent reflection effect.
  • the roll core is covered with a breathable blanket on the other open side of the roll core, diffused reflection of sound can be expected, and an excellent sound diffusion effect can be obtained. .
  • one side is closed with a lead plate.
  • the weight is 1003 and the thickness is 3.
  • this acoustic adjustment plate is more satisfactory in terms of clarity, diffusion, and lingering as compared with the comparative example.
  • the roll core thickness is between 75 and 90, excellent results can be obtained with any of the above elements.
  • One of the factors for obtaining sound with good sound image localization and depth and spread is that the outside of each cell of the roll core is the parts 20 and 20 in Fig. 1.
  • the cells 18 and the gaps 19 are connected to each other only in the pressure-bonded state at the part 21, although they are airtightly bonded at It seems that there is something.
  • the roll core is passed through one of the opening surfaces of the roll core.
  • the acoustic adjustment plate was constructed by attaching a temper cloth and closing the other opening with a non-permeable sheet, sound was absorbed from the low-frequency range to the high-frequency range on average. Since it is reflected moderately, a clear sound can be obtained. Also, since the sound absorbing material has a sound absorbing function, it is possible to prevent the sound of the speaker from vibrating the wall floor, etc. (damping effect). ⁇ In order to improve the speaker's characteristics, it is sufficient to use this acoustic adjustment plate as a speaker unit support, but it is sufficient to combine it with the back plate. By doing so, it is possible to obtain even more effects. Also, if it is used as a wall material, a soundproof wall with sound reflection effect can be obtained, which is suitable for a musical instrument practice room.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Building Environments (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

Plaque de régulation acoustique constituée par un organe présentant une structure laminée creuse. Cette plaque peut être utilisée en tant que support d'enceinte acoustique, ou bien elle peut être disposée derrière une enceinte pour absorber ou amortir l'énergie sonore provenant de l'enceinte, pour réduire les effets négatifs provoqués par le son. Dans ce but, des noyaux de rouleaux de papier (11) sont utilisés comme matériaux de noyaux, et la surface des ouvertures (14) sur un côté est recouverte d'une feuille de couverture poreuse (12) telle qu'un tissu pelucheux, un tissu velouté ou du feutre, tandis que la surface (15) des autres ouvertures est recouverte d'une feuille (13) imperméable à l'air, telle qu'une feuille de plomb ou une feuille plastique contenant de la poudre de fer. Le rayonnement sonore dans la gamme des aigus est absorbé par la feuille de couverture poreuse (12), tandis que le rayonnement sonore dans les régions des moyennes et des basses fréquences est absorbé par les cellules (18) et les interstices (19) formés par les noyaux des rouleaux (11). Aussi bien les noyaux des rouleaux (11) que la feuille imperméable (13) se comportent comme des amortisseurs de vibrations pour empêcher la propagation de vibrations à basse fréquence dans les parois ou dans le plancher.
PCT/JP1984/000153 1983-03-30 1984-03-30 Plaque de regulation acoustique WO1984003982A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP4615883U JPS59156300U (ja) 1983-03-30 1983-03-30 音響調整板
JP3223684U JPS60143496U (ja) 1984-03-05 1984-03-05 音響調整板

Publications (1)

Publication Number Publication Date
WO1984003982A1 true WO1984003982A1 (fr) 1984-10-11

Family

ID=26370774

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1984/000153 WO1984003982A1 (fr) 1983-03-30 1984-03-30 Plaque de regulation acoustique

Country Status (2)

Country Link
EP (1) EP0139765A4 (fr)
WO (1) WO1984003982A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS486820Y1 (fr) * 1967-08-30 1973-02-21
JPS5124241Y2 (fr) * 1973-08-30 1976-06-22
JPS5152322Y2 (fr) * 1974-12-20 1976-12-15
JPS522401Y2 (fr) * 1975-03-11 1977-01-20
JPS5338336Y2 (fr) * 1974-09-20 1978-09-18
JPS5413301A (en) * 1977-07-01 1979-01-31 Shisutemu Reiauto Kk Shield plate
JPS5546866B1 (fr) * 1970-12-18 1980-11-26

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3166149A (en) * 1965-01-19 Damped-resonator acoustical panels
US4379191A (en) * 1975-08-13 1983-04-05 Rohr Industries, Inc. Honeycomb noise attenuation structure
GB2056367B (en) * 1979-07-06 1983-06-02 Rohr Industries Inc Process for producing noise attenuation panels

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS486820Y1 (fr) * 1967-08-30 1973-02-21
JPS5546866B1 (fr) * 1970-12-18 1980-11-26
JPS5124241Y2 (fr) * 1973-08-30 1976-06-22
JPS5338336Y2 (fr) * 1974-09-20 1978-09-18
JPS5152322Y2 (fr) * 1974-12-20 1976-12-15
JPS522401Y2 (fr) * 1975-03-11 1977-01-20
JPS5413301A (en) * 1977-07-01 1979-01-31 Shisutemu Reiauto Kk Shield plate

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0139765A4 *

Also Published As

Publication number Publication date
EP0139765A1 (fr) 1985-05-08
EP0139765A4 (fr) 1985-10-14

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