JPH0634936U - Sound absorbing material - Google Patents

Sound absorbing material

Info

Publication number
JPH0634936U
JPH0634936U JP40701690U JP40701690U JPH0634936U JP H0634936 U JPH0634936 U JP H0634936U JP 40701690 U JP40701690 U JP 40701690U JP 40701690 U JP40701690 U JP 40701690U JP H0634936 U JPH0634936 U JP H0634936U
Authority
JP
Japan
Prior art keywords
glass wool
sound
absorbing material
sound absorbing
absorption coefficient
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.)
Pending
Application number
JP40701690U
Other languages
Japanese (ja)
Inventor
康敏 吉田
泰 鍋島
文喜 紀伊国谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sinko Industries Ltd
Original Assignee
Sinko Industries 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
Application filed by Sinko Industries Ltd filed Critical Sinko Industries Ltd
Priority to JP40701690U priority Critical patent/JPH0634936U/en
Publication of JPH0634936U publication Critical patent/JPH0634936U/en
Pending legal-status Critical Current

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Landscapes

  • Laminated Bodies (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

(57)【要約】 【目的】 基材としてグラスウール板を使用し、アルミ
箔で被覆することにより250HZ以下の可聴音に対し
てきわめて高い吸音率を示す吸音材を提供すること。 【構成】 グラスウールを圧縮して成形した二枚のグラ
スウール板を、同板間に空間部が形成されるようにスペ
ーサーを介して重合し、その外周面をアルミ箔等の金属
箔により被覆したことを特徴とする。 【効果】 250HZ以下の低い周波数域での吸音率を
高める。
(57) [Abstract] [Purpose] To provide a sound absorbing material having a very high sound absorption coefficient for audible sound of 250 HZ or less by using a glass wool plate as a base material and covering it with an aluminum foil. [Structure] Two glass wool plates formed by compressing glass wool are polymerized via a spacer so that a space is formed between the plates, and the outer peripheral surface is covered with a metal foil such as an aluminum foil. Is characterized by. [Effect] The sound absorption coefficient is enhanced in a low frequency range of 250 HZ or less.

Description

【考案の詳細な説明】 (産業上の利用分野) 本考案は、主に空調機器における送風機等の騒音発生源からの音を吸収する吸 音材に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention mainly relates to a sound absorbing material that absorbs sound from a noise generating source such as a blower in an air conditioner.

(従来技術及びその問題点) 従来から、送風機等から発せられる騒音を吸収する吸音材として、グラスウー ルあるいはグラスウールを圧縮して成形したグラスウール板なるものがあるが、 これら吸音材は250HZ以上の高い周波数域の可聴音に対しては厚さが薄くて も高い吸収率(吸音率)を示すが、250HZ以下の可聴音に対しては厚さを相 当厚くしても吸音率が低いという欠点を有していた。(Prior art and its problems) Conventionally, there has been a glass wool plate formed by compressing glass wool or glass wool as a sound absorbing material that absorbs noise emitted from a blower or the like. Although it has a high absorption rate (sound absorption rate) for audible sound in the frequency range even if it is thin, it has a drawback that it has a low sound absorption rate for audible sound below 250 HZ even if the thickness is increased. Had.

(考案の目的) 本考案は、上記従来技術の問題点を解決するために、基材としてグラスウール 板を使用し、アルミ箔等の金属箔で被覆することにより250HZ下の可聴音に 対してきわめて高い吸音率を示す吸音材を提供することを目的とするものである 。(Object of the Invention) In order to solve the above-mentioned problems of the prior art, the present invention uses a glass wool board as a base material and coats it with a metal foil such as an aluminum foil, so that the audible sound under 250 HZ is extremely reduced. The object is to provide a sound absorbing material exhibiting a high sound absorption coefficient.

(考案の開示) 本考案に係る吸音材は、グラスウールを圧縮して成形した二枚のグラスウール 板1,1を、同板間に空間部が形成されるようにスペーサー3,3を介して重合 し、その外周面をアルミ箔等の金属箔4により被覆したことを特徴とするもので ある。DISCLOSURE OF THE INVENTION The sound absorbing material according to the present invention comprises two glass wool plates 1 and 1 formed by compressing glass wool, and polymerized via spacers 3 and 3 so that a space is formed between the glass wool plates 1 and 1. However, the outer peripheral surface thereof is covered with a metal foil 4 such as an aluminum foil.

(実施例) 厚さ25mm二枚のグラスウール板1,1を、厚さ25mmスペーサー(グラ スウール板を棒状に切断したもの)3,3を介して対向させ、接着剤により貼着 して一体化し、両グラスウール板間に厚さ25mmの空間部2つまり空気層がで きるように構成したものを用意してこれを吸音材の資料1とする。この資料1の 外周面全面をアルミ箔4で被覆したものを用意してこれを資料2とする。他に、 厚さ50mm、75mmのクラスウール板を用意し、これらをそれぞれ吸音材の 資料3,4とし、資料4の外周面全面をアルミ箔で被覆たものを資料5とする。(Example) Two glass wool plates 1, 1 having a thickness of 25 mm are made to face each other via spacers 25 (thickness of a glass wool plate) 3, 3 having a thickness of 25 mm, and adhered with an adhesive to be integrated. A material having a thickness of 25 mm, that is, an air layer, formed between the glass wool plates is prepared, and this is referred to as sound absorbing material reference material 1. Material 2 is prepared by covering the entire outer peripheral surface of this material with aluminum foil 4. In addition, class wool plates with thicknesses of 50 mm and 75 mm are prepared, and these are used as materials 3 and 4 of sound absorbing materials, respectively, and material 5 is obtained by coating the entire outer peripheral surface of material 4 with aluminum foil.

これら資料1,2,3,4、5の吸音率を、63HZ、125HZ、250H Z・・・・・のオクターブバンド中心周波数の音に対して測定したところ、次表 のような結果を得た。 The sound absorption coefficients of these materials 1, 2, 3, 4, and 5 were measured with respect to the sounds of the octave band center frequencies of 63HZ, 125HZ, 250HZ, ..., and the results shown in the following table were obtained. .

この結果、グラスウール使用量が同じ資料1と資料3とを比較した場合、25 0HZ下の低い周波数域の音に対して資料1の方が若干高い吸音率を示し、厚さ が同じ資料1と資料4とを比較した場合、低い周波数域の音に対して資料4の方 が若干高い吸音率を示していることが分かる。このことからアルミ箔で被覆して いない場合にはグラスウール使用量の多い方が低い周波数域での吸音率が高いと いえるが、資料4とこれにアルミ箔を被覆した資料5とを比較した場合、全周波 数域において資料5の方が吸音率が低下しており、吸音材単独のものにアルミ箔 を被覆しても逆効果となることが分かる。 As a result, when comparing Material 1 and Material 3 where the amount of glass wool used is the same, Material 1 shows a slightly higher sound absorption coefficient for sound in the low frequency range below 250 HZ, and Material 1 with the same thickness. When comparing with Material 4, it can be seen that Material 4 exhibits a slightly higher sound absorption coefficient for sounds in the low frequency range. From this, it can be said that the sound absorption coefficient in the low frequency range is higher when the amount of glass wool used is higher when the material is not covered with aluminum foil. However, the sound absorption coefficient of Material 5 is lower in all frequency ranges, and it can be seen that even if the sound absorbing material alone is coated with aluminum foil, the opposite effect is obtained.

而して、資料1と資料2及び資料4を比較した場合、即ちアルミ箔と空気層の 組合わせによる効果を比較した場合、63HZ、125HZの低い周波数域での 吸音率に顕著な差が認められるが、これは63HZ、125HZ域に共振周波数 を有するアルミ箔がその周波数域の発生騒音エネルギーを箔振動という振動エネ ルギーに変換して吸収し、空気層が、変換された振動エネルギーが再び騒音エネ ルギーに変換しないように緩衝材として作用するものと考えられる。 When comparing the materials 1 and 2 and 4, ie, the effects of the combination of aluminum foil and air layer, a significant difference in sound absorption coefficient in the low frequency range of 63HZ and 125HZ is recognized. This is because aluminum foil, which has a resonance frequency in the 63HZ and 125HZ range, converts the noise energy generated in that frequency range into the vibration energy called foil vibration and absorbs it, and the air layer converts the converted vibration energy into noise again. It is considered to act as a cushioning material so as not to convert it into energy.

(考案の効果) 本考案に係る吸音材によれば、二枚のグラスウール板を、同板間に空間部つま り空気層が形成されるようにスペーサーを介して重合し、その外周面をアルミ箔 等の金属箔により被覆したもので、二枚のグラスウール板にサンドイッチ状に挟 まった空気層を音の緩衝材として作用させ、かつ、金属箔の共振を助ける作用を させるようにしたものであるから、250HZ以下の低い周波数域での吸音率を 高めることができるようになったもので、従来の吸音材では吸収するのが困難で あった250HZ以下の音をきわめて効果的に吸収することができる吸音材を安 価に提供でるものである。(Effects of the Invention) According to the sound absorbing material of the present invention, two glass wool boards are superposed through a spacer so that an air layer is formed between the two boards, and the outer peripheral surface is made of aluminum. It is coated with a metal foil such as foil, and the air layer sandwiched between two glass wool plates acts as a cushioning material for sound and also functions to assist the resonance of the metal foil. Therefore, it is possible to increase the sound absorption coefficient in the low frequency range of 250HZ or less, and it is extremely effective to absorb the sound of 250HZ or less, which was difficult to be absorbed by the conventional sound absorbing material. It is possible to inexpensively provide a sound absorbing material that can be used.

尚、本案吸音材は、250HZ以上の高い周波数域の音に対しては吸音率が低 いが、外周面に金属箔を被覆していない資料1のような高い周波数域での高い吸 音率を示す吸音材と併用することによって広い周波数域を有する音源の吸音装置 に使用することができるものである。 The sound absorbing material of the present invention has a low sound absorption coefficient for sounds in the high frequency range of 250 HZ or higher, but has a high sound absorption coefficient in the high frequency range as in Document 1 in which the outer peripheral surface is not covered with metal foil. The sound absorbing device for a sound source having a wide frequency range can be used in combination with the sound absorbing material.

【図面の簡単な説明】[Brief description of drawings]

図面は本考案に係る吸音材の断面図である。 1…グラスウール板、2…空間部、3…スペーサー、4
…金属箔
The drawing is a sectional view of the sound absorbing material according to the present invention. 1 ... Glass wool board, 2 ... Space part, 3 ... Spacer, 4
… Metal foil

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] グラスウールを圧縮して成形した二枚のグラスウール板
1,1を、同板間に空間部2が形成されるようにスペー
サー3,3を介して重合し、その外周面をアルミ箔等の
金属箔4により被覆したことを特徴とする吸音材。
Two glass wool plates 1, 1 formed by compressing glass wool are polymerized via spacers 3, 3 so that a space 2 is formed between the plates, and the outer peripheral surface is a metal foil such as aluminum foil. A sound-absorbing material characterized by being coated with 4.
JP40701690U 1990-12-28 1990-12-28 Sound absorbing material Pending JPH0634936U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP40701690U JPH0634936U (en) 1990-12-28 1990-12-28 Sound absorbing material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP40701690U JPH0634936U (en) 1990-12-28 1990-12-28 Sound absorbing material

Publications (1)

Publication Number Publication Date
JPH0634936U true JPH0634936U (en) 1994-05-10

Family

ID=18516641

Family Applications (1)

Application Number Title Priority Date Filing Date
JP40701690U Pending JPH0634936U (en) 1990-12-28 1990-12-28 Sound absorbing material

Country Status (1)

Country Link
JP (1) JPH0634936U (en)

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