JP4293737B2 - Sound insulation performance evaluation method between adjacent rooms and selected side walls - Google Patents

Description

【００３５】
上記表における（ｔ＝＊１）、（ｔ＝＊２）は、壁厚ｔが＊１、＊２であることを例示しており、ＡＬＣ版＋ＧＬ等は、ＡＬＣ版の室内面にＧＬボンド等を敷設した側壁、その他を同様に表示している。
【００３６】
１２． 入射地点における振動加速度レベル(ＶＡＬso)の算定
内装壁６は、図４に部分拡大して示すように、一定の間隔で配置された下地材７によって支持されていることから、上述の入射効率レベル（Ｉｎ）は、表１で示したように、下地材の種別毎に設定されることになる。
【００３７】
側壁で発生する振動は、内装壁６の表面→下地材７→側壁４といった伝搬経路を辿るので、入射地点における振動加速度レベルの算定位置は、側壁４と下地材７の接続位置になるが、下地材が、図４に示すＧＬボンドのように間隔を置いて配置されずに側壁の前面に亘って設けられる場合には、入射地点は無限になる。
【００３８】
従って、入射地点における振動加速度レベル(ＶＡＬso)は、以下の式によって周波数毎に算定する。
ＶＡＬso＝ＳＰＬs＋Ｉｎ
【００３９】
１３． 総到達振動加速度レベル（ＶＡＬ_S）の算定
音源室１側の側壁４は、図５に部分拡大して示すように、戸境壁３と交差して交差部８を形成しており、▲１▼〜▲６▼の入射地点に配置されている下地材７を経由して側壁４に個別の伝搬経路が形成されていることから、側壁で発生する振動は、これらの各伝搬経路を辿って交差部８の音源室側の音源室側戸境壁面の延長線上に位置する境界面９に伝達されることになる。
【００４０】
境界面９における到達振動加速度レベルの値は、上記の算定された入射地点における振動加速度レベル(ＶＡＬso)の値から、側壁４の振動に対する内部減衰係数（α）を考慮して算定され、境界面９における総到達振動加速度レベル（ＶＡＬ_S）の値は、側壁４で個別に発生する各振動の入力位置から伝搬してくる振動を合成した、下記の式によって求められる。
【００４１】
ＶＡＬ_S＝Σ(ＶＡＬso−α√ｆ・Ｌ_i)
但し、 ＶＡＬ_S ： 総到達振動加速度レベル
ＶＡＬ_SO ： 入射地点の振動加速度レベル
α : 側壁内を伝搬する振動の内部減衰係数
ｆ ： 周波数
Ｌ_i ： 入射地点から音源室側戸境壁面の延長線上に位置する境界面までの距離
【００４２】
上記計算式において、▲１▼〜▲６▼の入射地点における振動加速度レベルは、密閉された室では拡散音場が形成されて、側壁面へ入射する音圧レベルが略一定になることから同一であり、内部減衰係数（α）の例としては、ＡＬＣ版：０．２５、コンクリート版：０．０３、ボイド状押出成形板：０．１５の数値が知られている。
【００４３】
１４． 交差部減衰量（Δｋ）の設定
図６に部分拡大して示すように、側壁４は戸境壁３と交差して交差部８を形成しており、交差部８には、音源室側の境界面９と受音室側の境界面９’とが形成されている。
【００４４】
音源室側の境界面９と受音室側の境界面９’との間では、交差部特性によるエネルギー損失が生じることから、交差部減衰量（Δｋ）を設定する必要がある。
【００４５】
交差部におけるこの減衰量（Δｋ）は、側壁を構成する部材によって異なるが、事前に実験室や現場における測定によって得ることが可能であり、「交差減衰Ｄ．Ｂ．」にデータベース化して格納して置き、選定されている側壁４の減衰量を選択できるようにしている。
データベース内容の一例は、表２の通りである。
【００４６】
【表２】

【００４７】
上記表における（ｔ＝＊１）〜（ｔ＝＊４）は、壁厚ｔが＊１〜＊４であることを例示しており、ＡＬＣ版スリット（Ｄ＝＊２）の場合は、ＡＬＣ版の側壁において、戸境壁との交差部に側壁の厚さ方向に貫通する幅＊２のスリットが設けられていることを表示している。
【００４８】
１５． 透過振動加速度レベル（ＶＡＬ_ro）の算定
総到達振動加速度レベル（ＶＡＬ_S）の値から、下記の式によって受音室側の境界面９’における透過振動加速度レベル（ＶＡＬ_ro）を求める。
ＶＡＬ_ro＝ＶＡＬ_S−Δｋ
【００４９】
１６． 放射地点における振動加速度レベル(ＶＡＬ_r)の算定
図７に部分拡大して示すように、本実施の形態では、内装壁６が受音室２側の側壁４に一定の間隔で配置された下地材７で支持されているので、戸境壁３との交差部８から下地材７が配置された▲１▼〜▲６▼の地点に個別の伝搬経路が形成される。
【００５０】
従って、交差部８の受音室側の境界面９’からの振動は、これらの各伝搬経路を辿って側壁４の放射地点に成る▲１▼〜▲６▼の位置に伝搬される。
【００５１】
このことから、放射地点における振動加速度レベル(ＶＡＬ_r)の値は、境界面９’における透過振動加速度レベル（ＶＡＬ_ro）に基づいて側壁４の振動に対する内部減衰係数（α）を考慮した下記の式によって算定される。
【００５２】
ＶＡＬ_r＝ＶＡＬ_ro−α√ｆ・Ｄ_i
但し、 ＶＡＬ_r ： 放射地点の振動加速度レベル
ＶＡＬ_rO ： 交差部を透過した受音室側戸境壁面での透過振動加速度レベル
α : 側壁内を伝搬する振動の内部減衰係数
ｆ ： 周波数
Ｄ_i ： 放射地点から受音室側戸境壁面の延長線上に位置する境界面までの距離
【００５３】
以上のように、本発明における遮音性能評価方法では、側壁面における振動加速度レベル(ＶＡＬｒ)の値を、境界面９’からの距離に対応して内部減衰されている値を合成する方式で算定しているので、実際に則した値を提供している。
【００５４】
このことは、受音室側側壁からの音圧の放射面積内における平均振動加速度レベル(ＶＡＬ)と放射面積レベル（１０ｌｏｇ₁₀Ｓ）（但し、Ｓは受音室の側壁面積）とから内装壁の総振動加速度レベル(ＶＡＬ)を算定し、実際には寄与しない放射面積の振動加速度レベルも合成レベルに影響があるものと算定するとして、実際と異なる値を選択していた従来の算定方法とは、算定精度において大幅に乖離してくる要因になっていた。
【００５５】
尚、上記の各計算式における側壁内を伝搬する振動の内部減衰係数（α）は、上述したように、ＡＬＣ版：０．２５、コンクリート版：０．０３、ボイド状押出成形板：０．１５である。
【００５６】
１７． 振動伝達レベル（ΔＴ）の設定
本実施の形態のように、一定の間隔で配置された下地材７によって▲１▼〜▲６▼の伝搬経路が形成され、側壁４の振動が、側壁４→下地材７→内装壁６の表面といった伝搬経路を辿る場合には、内装壁６の表面における振動加速度レベルを算定するために、下地材７に対応する振動伝達レベル（ΔＴ）を考慮している。
【００５７】
振動伝達レベル（ΔＴ）の値は、異なる部材で構成される側壁について事前に実験室や現場で測定した値であり、本実施の形態では、 「振動伝達Ｄ．Ｂ．」にデーターベース化して格納して置くことで、設定された下地材７に見合った 振動伝達レベル（ΔＴ）を選択使用可能にしている。
尚、表３は、「振動伝達Ｄ．Ｂ．」に格納されているデータ例である。
【００５８】
【表３】

【００５９】
上記表における（ｔ＝＊１）、（ｔ＝＊２）は、壁厚ｔが＊１、＊２であることを例示しており、ＡＬＣ版＋ＧＬ等は、ＡＬＣ版の室内面にＧＬボンド等を敷設した側壁、その他を同様に表示している。
【００６０】
１８． 内装壁に達する振動加速度レベル(ＶＡＬ_r1)の算定
内装壁６に達する振動加速度レベル (ＶＡＬ_r1)の算定は、放射地点における振動加速度レベル(ＶＡＬ_r)の値から、下記の式によってを求めることになる。
ＶＡＬ_r1＝ＶＡＬ_r＋ΔＴ
【００６１】
１９． 内装壁における振動加速度レベル(ＶＡＬ_rS)の算定
図８に部分拡大して示すように、本実施の形態では、内装壁６が受音室２側の側壁４に一定の間隔で配置された下地材７で支持されているので、交差部８の受音室側の境界面９’からの振動は、下地材７が配置された▲１▼〜▲６▼の地点に形成される各伝搬経路を辿って側壁４の放射地点に成る▲１▼〜▲６▼の位置に伝搬される。
【００６２】
このために、側壁面における振動加速度レベル(ＶＡＬ_rS)は、境界面９’からの距離に対応した内部減衰によって、図示のようにそれぞれに異なった値が算定されている。
【００６３】
従って、内装壁における振動加速度レベル(ＶＡＬ_rS)の値は、側壁４の放射地点から個別に伝搬してくる振動を内装壁で合成する下記の式によって求められる。
ＶＡＬ_rS＝ΣＶＡＬ_r1
【００６４】
以上のように、本発明における遮音性能評価方法では、側壁面における振動加速度レベル(ＶＡＬ_rS)の値を、境界面９’からの距離に対応して内部減衰されている値を合成して算定しているので、実際に則した値を提供することになる。
【００６５】
２０． 内装壁の放射効率レベル（Ｒ）の設定
【００６６】
内装壁に発生した振動加速度レベル(ＶＡＬ_rS)が音圧に変換される際の変換効率を放射効率レベル（Ｒ）と定義しして、その値をｄＢ値で表示する。
【００６７】
この値は、側壁を構成する部材によって異なるため、事前に実験室や現場で測定した値であり、本実施の形態では、 「放射効率Ｄ．Ｂ．」にデーターベース化して格納して置くことで、設定された内装壁６と側壁４との組み合わせに見合った放射効率レベル（Ｒ）を選択している。
尚、表４は、「放射効率Ｄ．Ｂ．」に格納されているデータ例である。
【００６８】
【表４】

【００６９】
上記表における（ｔ＝＊１）、（ｔ＝＊２）は、壁厚ｔが＊１、＊２であることを例示しており、ＡＬＣ版＋ＧＬ等は、ＡＬＣ版の室内面にＧＬボンド等を敷設した側壁、その他を同様に表示している。
【００７０】
２１． 等価吸音面積レベル（Ａｒ）の算定
受音室の室表面積と平均吸音率から吸音面積を求めて、等価吸音面積レベル（Ａｒ）を算定する。
Ａｒ＝１０ｌｏｇ₁₀(Ａ)
但し、 Ａ ： 吸音面積
【００７１】
２２． 側壁固体伝搬音（ＳＰＬ_r1）の算定
内装壁で発生する振動は、側壁４→下地材７→内装壁６の表面といった伝搬経路を辿るので、内装壁における音圧レベル(ＳＰＬ_{r １})は、内装壁の放射効率レベル（Ｒ）を考慮して下記の式によって周波数毎に算定する。
ＳＰＬ_r1＝ＶＡＬ_rS＋Ｒ−２０ｌｏｇ₁₀ｆ−Ａ_r＋３６
【００７２】
以上の各算定によって、音源室側の音圧によって発生する振動が側壁を経由して受音室側に伝搬してくる音圧は、事前に実験室や現場で測定してデーターベース化した値を、遮音性能を評価する対象である側壁や内装壁に適用させて使用することによって、実態に則した数値として確定することが可能である。
【００７３】
又、従来例と同様に実施する戸境壁からの直接透過音（イ）や窓やドア等の開口部５からの迂回伝搬音（ロ）等を加算するために必要な以下の算定については、従来の遮音構造選定フローと同様に展開できることから、項目のみを記述するに留めるものである。
【００７４】
２３． 戸境壁直接透過音（ＳＰＬ_r2）の算定
【００７５】
２４． 窓やドア等からの迂回伝搬音（ＳＰＬ_{r ３}）の算定
【００７６】
２５． 受音室内総音圧レベル（ＳＰＬ_r）の算定
受音室内総音圧レベル（ＳＰＬ_r）の算定は、上述した側壁固体伝搬音（ＳＰＬ_r1）、公知の計算式で算定される戸境壁直接透過音（ＳＰＬ_r2）及び窓やドア等からの迂回伝搬音（ＳＰＬ_{r ３}）を用いることで、下式によって算定される。
【００７７】

【００７８】
２６． 隣接室間の遮音性能（Ｄ_r）の算定
Ｄ_r＝ＳＰＬ_S−ＳＰＬ_r
【００７９】
２７． 許容値との照査
遮音性能の許容値は、通常Ｄ値で与えられており、例えば、Ｄ−５０の場合では、各周波数帯域におけるレベルは、以下に示す数値になるが、上記の隣接室間遮音性能（Ｄ_r）の算定値が、これらの値以上であれば遮音性能を満たしていることになる。
【００８０】

【００８１】
２８． 必要対策量（Ｄ_t）の算定
算定された上記の遮音性能（Ｄ_r）が、１２５Ｈｚ〜２ＫＨｚにおいて表５の数値を上回っていれば、遮音性能の評価作業は完了することになるが、いずれかの帯域においてこれを下回っている場合には、必要な対策量を算定することになる。
Ｄ_t＝Ｄ−Ｄｒ
【００８２】
図９に示す遮音性能の評価結果は、本発明による隣接室間の遮音性能評価方法を、仮に選定した遮音構造に適用した実施例である。
【００８３】
本実施例では、上述した算定の結果として、音源ＳＰＬ_S、音源側側壁の振動加速度レベル、交差部境界面の到達、透過振動加速度レベル及び内装壁を経ての側壁固体音等の主要な項目の数値と、戸境壁の直接透過音や窓やドア等からの迂回伝搬音等が示されているように、本発明による遮音性能の算定は、従来のように該当作業現場での実測値のような繁雑な作業を要さずに、各項目の定量的な算定値によって最終的に定量的な遮音性能を確定している。
【００８４】
図９では、遮音性能として求められる許容値が各周波数帯域毎に設定されており、項目２６に仮に選定された遮音構造について算定された遮音性能が記録されているが、両方の数値から評価すると、項目２７に示すように、５００Ｈｚの帯域で２．５ｄＢ分の対策量が必要である。
【００８５】
算定された必要対策量に対する対応策の検討は、戸境壁の直接透過音、窓やドア等からの迂回伝搬音及び側壁固体音のそれぞれについて、個別に検討されることになるが、戸境壁の直接透過音と窓やドア等からの迂回伝搬音については、従来と同様の対応策の検討で行われることから、ここでの説明は省略する。
【００８６】
側壁固体音に対する対応策の検討３０としては、図３のフローに示した５つの検討対策が予定されており、それぞれについて対応可能か否かの検討を行うことになる。
以下に、各検討対策の実施の形態とその実施例について説明する。
【００８７】
３１． 内装下地仕様変更の検討
検討のためには、入射効率Ｄ.Ｂ．、放射効率Ｄ.Ｂ．、振動伝達Ｄ.Ｂ．の中から仕様変更に伴う対策効果量を算定し、必要対策量と照査して条件を満たすものを選定する。
【００８８】
本実施例では、側壁の原仕様がＡＬＣ版＋ＧＬ法だったので、入射効率Ｄ.Ｂ．、放射効率Ｄ.Ｂ．、振動伝達Ｄ.Ｂ．からＡＬＣ版＋木下地やＡＬＣ版＋ＬＧＳ下地に変えた場合の変化分を求めて、必要対策量への対応が可能か否かを検討した結果、側壁をＡＬＣ版＋木下地にすることで、全ての帯域において遮音性能の許容値を満足することが出来ている。
【００８９】
３２． 交差部への対策
検討のために、交差減衰Ｄ.Ｂ．から側壁と戸境壁との交差部にスリットを設けた場合の対策効果量、材質や構造等の仕様変更による効果量の変化及びその他の振動伝搬に影響を与える手段について、必要対策量と照査して条件を満たすものを選定する。
【００９０】
本実施例では、側壁と戸境壁との交差部における原仕様がＡＬＣ版なので、交差減衰Ｄ.Ｂ．から、他の仕様に変えた場合の変化分を求めた。検討の結果は、交差部にスリットを入れることで対応可能である。
【００９１】
３３． 側壁の部材変更による交差部減衰量の検討
検討のために、側壁の部材を変更した場合の交差減衰量を交差減衰Ｄ.Ｂ．から検索した上で対策効果量を算定し、必要対策量と照査して条件を満たすものを選定する。
【００９２】
３４． 内装下地仕様の変更と交差部への対策との組合わ変更の検討
検討のために、入射効率Ｄ.Ｂ．、放射効率Ｄ.Ｂ．、振動伝達Ｄ.Ｂ．の中から仕様変更に伴う対策効果量を算定すると共に、交差減衰Ｄ.Ｂ．から側壁の戸境壁との交差部にスリットを設けた場合等の対策効果量を算定して、両者を複合させた場合の対策効果量を算定し、必要対策量と照査して条件を満たすものを選定する。
【００９３】
３５．内装下地仕様の変更と側壁の部材変更による検討
入射効率Ｄ.Ｂ．、放射効率Ｄ.Ｂ．、振動伝達Ｄ.Ｂ．の中から内装下地仕様の変更に伴う対策効果量を算定すると共に、側壁の部材を変更した場合の交差減衰量を交差減衰Ｄ.Ｂ．から検索して対策効果量を算定して、両者を複合させた場合の対策効果量を算定し、必要対策量と照査して条件を満たすものを選定する。
【００９４】
以上のように、算定された遮音性能が全周波数帯域において許容値を満たしていない場合には、内装下地、側壁と戸境壁との交差部及び側壁の部材変更を基本にしながら、必要な場合にはこれらの組み合わせによって、対策効果量を算定し、必要対策量と照査することで条件を満たしているかを評価する。
【００９５】
評価選択の過程において、下地材の変更でも交差部にスリットを入れても条件を満たしている場合には、これらの対応策の中から最適な仕様を選定することになるが、いずれを最適な対応策として採用するかは意匠面・施工面から判断することになる。
【００９６】
しかして、データベースの全てを適用しながら算定し直しても対応策のない場合には、元に戻って側壁面積等を意匠面も含めて再検討することになる。
【００９７】
以上のように、本発明による隣接室間の遮音性能評価方法は、仕切られた戸境壁とこれに交差する側壁で囲われた隣接する室間で、音源室の音圧レベルと音源室の音圧が戸境壁の直接透過音、窓やドアからの迂回伝搬音及び側壁固体伝搬音として受音室に伝搬される音圧レベルを算定する際に、伝搬される側壁固体伝搬音の音圧レベルを、音源室の音圧が音源室側の側壁に入射して側壁内を内部減衰しながら伝搬して受音室側の側壁から放射される音圧レベルとして算定することで、実測のような付属的作業を不要にしながら、戸境壁や側壁の材質や構造に基づく定量値を採用することで伝搬される音圧レベルを簡潔に算定して、隣接室間の遮音性能を定量的に評価できる。
【００９８】
尚、上述した隣接室間の遮音性能評価方法では、受音室に伝搬される音圧レベルの算定において、隣接室の上下に在るスラブは音圧レベルに与える影響が少ないので考慮しないという従来の慣例に従って評価している。
【００９９】
しかして、必要な場合にはスラブについても側壁と見なすことで、側壁の場合と同様に受音室に伝達される音圧レベルを算定して、側壁固体伝搬音をスラブと側壁とを含んだものとして算出することも可能である。この場合には、スラブからの小さな音圧レベルをも精細に加味することから遮音性能をより正確に評価できる。
【０１００】
又、本発明による選定された側壁は、上述の実施の形態及びその実施例で説明したように、設計された遮音構造に対して、上記の遮音性能評価方法を用いて算定される受音室側の音圧レベルと音源室側の音圧レベルとを比較することで、その遮音性能を算定し、この遮音性能値が許容値を達成するようにことで側壁を選定している。
【０１０１】
そして、設計された遮音構造の遮音性能値が許容値を達成していない場合には、許容値を達成するために、側壁の交差部特性を変換したり、内装壁の入射効率、振動伝達効率及び放射効率を変換しながら算定し直すことで遮音性能値を変更させて、最適な状態に選定している。
【０１０２】
以下に、本発明による選定された側壁の実施形態について、図面に基づいて詳細に説明する。
【０１０３】
図１０は、側壁の交差部特性を変えるための一実施の形態である。
図示のように、戸境壁１０１と交差している側壁１０２には、その交差部にスリット１０３を形成している。スリット１０３は、交差部に予め隙間を空けて側壁を施工したり、丸鋸等によって側壁を切断することによって形成するが、完全に切断するか強度を考慮しながら上下端を残した状態で溝状に形成するかは、遮音性能の必要対策量や側壁の材質等によって適宜に選択されることになる。
【０１０４】
尚、本実施の形態では、側壁面を貫通するスリットを設けているが、必ずしもこれを貫通する必要はなく、所定の特性が得られる場合には、側壁に溝状に形成しても適用可能である。
【０１０５】
同様に、スリット幅の大きさによって、その間にグラスウールのような充填材を充填させて表面をシールするか充填材のない空隙にするか否かについても、データーベースの数値例として多様化できるものである。
【０１０６】
このスリット１０３の形成によって、例えば表２に示すＡＬＣ版の例のように、各周波数帯域において大きな数値の変更が期待できるものであり、遮音性能の必要対策量に応じて有効に対処できる対応策である。
【０１０７】
尚、図において１０４は、内装壁であり、１０５はその下地材である。
【０１０８】
図１１は、側壁を変えることによって、交差部特性及び側壁内を伝搬する振動の内部減衰係数を変えるための他の実施の形態である。
本実施の形態では、側壁として、ボイド状押出成形版１０６を採用することで、側壁の振動伝搬における特性の変更を図っている。
【０１０９】
ボイド状押出成形版１０６は、内部にボイド１０７を形成しており、このボイド１０７の形成によって、例えば表２に示す押出成形版の例のように、周波数帯域１２５Ｈｚにおいてはコンクリート版とＡＬＣ版との中間の値を示し、２５０Ｈｚ〜２０００ＨｚではＡＬＣ版よりも大きな数値を発揮して、遮音性能の必要対策量に応じて有効に対処することができる。
【０１１０】
以上、本発明を実施の形態に基づいて詳細に説明してきたが、本発明による隣接室間の遮音性能評価方法と選定された側壁は、上記実施の形態に何ら限定されるものでなく、交差減衰Ｄ.Ｂ．の中にデータベース化されている、側壁の材質や側壁の交差部にスリットを設ける等の構造変更の多様化のように、対策効果量の変化に大きく貢献する検討対策を多様化する等、本発明の趣旨を逸脱しない範囲において種々の変更が可能であることは当然のことである。
【０１１１】
【発明の効果】
請求項１に記載の隣接室間の遮音性能評価方法は、戸境壁で仕切られ、戸境壁に交差する側壁で囲われた隣接する室間において、音源室の音圧レベルと、音源室の音圧が戸境壁の直接透過音、窓やドアからの迂回伝搬音及び側壁固体伝搬音として受音室に伝搬される音圧レベルを算定の上合成する受音室の音圧レベルとの差によって決定される隣接室間の遮音性能評価方法において、伝搬される側壁固体伝搬音の音圧レベルを、音源室の音圧が音源室側の側壁に入射して側壁内を内部減衰しながら伝搬して受音室側の側壁から放射される音圧レベルとして算定することとし、伝搬される側壁固体伝搬音の音圧レベルは、音源室側の側壁面から入射した音圧を振動加速度レベルに変換して、入射地点毎に内部減衰しながら戸境壁との交差部に達する到達振動加速度レベルを算定し、音源室側の全側壁面からの到達振動加速度レベルを合成して総到達振動加速度レベルを算定し、該総到達振動加速度レベルから交差部特性によるエネルギー損失を減じて交差部を透過した透過振動加速度レベルを算定し、該透過振動加速度レベルに基づいて戸境壁との交差部から受音室側の側壁内を内部減衰しながら受音室の側壁面の放射地点に達する振動加速度レベルを算定し、該振動加速度レベルを放射地点毎に音圧に変換すると共に合成して受音室側の全側壁面から放射される音圧レベルとして算定されることを特徴としているので、音源室から受音室に伝搬する音を定量的に算定の上合成することで受音室の音圧レベルを算定し、隣接室間の遮音性能を現場での実測作業を必要としないで、定量的に算定評価できる効果を奏している。
【０１１２】
また、伝搬される側壁固体伝搬音の音圧レベルを、音源室側の側壁面から入射した音圧を振動加速度レベルに変換して、入射地点毎に内部減衰しながら戸境壁との交差部に達する到達振動加速度レベルを算定し、音源室側の全側壁面からの到達振動加速度レベルを合成して総到達振動加速度レベルを算定し、総到達振動加速度レベルから交差部特性によるエネルギー損失を減じて交差部を透過した透過振動加速度レベルを算定し、透過振動加速度レベルに基づいて戸境壁との交差部から受音室側の側壁内を内部減衰しながら受音室の側壁面の放射地点に達する振動加速度レベルを算定し、振動加速度レベルを放射地点毎に音圧に変換すると共に合成して受音室側の全側壁面から放射される音圧レベルとして算定することを特徴としているので、上記効果に加えて、隣接する室間における遮音性能を具体的な形態で算定できる効果を奏している。
【０１１３】
請求項２に記載の発明である隣接室間の遮音性能評価方法は、請求項１に記載の隣接室間の遮音性能評価方法において、総到達振動加速度レベルを以下の式によって算定することを特徴としているので、上記効果に加えて、戸境壁との交差部における総到達振動加速度レベルを定量的に算定できる効果を奏している。
【０１１４】
ＶＡＬ_S＝Σ（ＶＡＬ_SO−α×√ｆ×Ｌ_i）（ｄＢ）
但し、 ＶＡＬ_S ： 総到達振動加速度レベル
ＶＡＬ_SO ： 入射地点の振動加速度レベル
α : 側壁内を伝搬する振動の内部減衰係数
ｆ ： 周波数
Ｌ_i ： 入射地点から音源室側戸境壁面の延長線上に位置する境界面までの距離
【０１１５】
請求項３に記載の発明である隣接室間の遮音性能評価方法は、請求項１又は２に記載の隣接室間の遮音性能評価方法において、放射地点の振動加速度レベルを以下の式によって算定することを特徴としているので、上記効果に加えて、戸境壁との交差部の透過振動加速度レベルから放射地点の振動加速度レベルを定量的に算定できる効果を奏している。
【０１１６】
ＶＡＬ_rS＝Σ（ＶＡＬ_{r ０}−α×√ｆ×Ｄ_i）（ｄＢ）
但し、 ＶＡＬ_rS ： 放射地点の振動加速度レベル
ＶＡＬ_rO ： 交差部を透過した受音室側戸境壁面での透過振動加速度レベル
α : 側壁内を伝搬する振動の内部減衰係数
ｆ ： 周波数
Ｄ_i ： 放射地点から受音室側戸境壁面の延長線上に位置する境界面までの距離
【０１１７】
請求項４に記載の発明である隣接室間の遮音性能評価方法は、請求項１乃至３のいずれかに記載の隣接室間の遮音性能評価方法において、音源室側の側壁への音圧の入射地点における振動加速度レベルを、音源室の音圧レベルに側壁の室内面に敷設される内装壁の入射効率を加味して算定することを特徴としているので、上記効果に加えて、内装壁の影響を具体的にして隣接室間の遮音性能の定量度を向上させる効果を奏している。
【０１１８】
請求項５に記載の発明である隣接室間の遮音性能評価方法は、請求項１乃至４のいずれかに記載の隣接室間の遮音性能評価方法において、受音室側の内装壁面へ伝達される振動加速度レベルを、側壁の放射地点での振動加速度レベルに側壁の室内面に敷設される内装壁への振動伝達効率を加味して算定することを特徴としているので、上記効果に加えて、内装壁の影響を具体的にして隣接室間の遮音性能の定量度を向上させる効果を奏している。
【０１１９】
請求項６に記載の発明である隣接室間の遮音性能評価方法は、請求項５に記載の隣接室間の遮音性能評価方法において、受音室側の内装壁面から放射される音圧レベルを内装壁に伝達される振動加速度レベルに上記内装壁の放射効率を加味して算定することを特徴としているので、上記効果に加えて、内装壁の影響を具体的にして隣接室間の遮音性能の定量度を向上させる効果を奏している。
【０１２０】
本発明による選定された側壁は、請求項１乃至６のいずれかに記載の隣接室間の遮音性能評価方法を用いて、隣接室間の遮音性能を音源室側の音圧レベルと受音室側の算定される音圧レベルとを比較して評価し、遮音性能が許容値を達成することで決定されており、許容値を達成するために必要に応じて、戸境壁との交差部の側壁に戸境壁の厚さ方向に貫通するスリットを交差部方向に沿って形成して交差部特性を変えたり、側壁をボイド状押出成形版で形成して交差部特性及び側壁を伝達する振動の減衰性状を変えたり、内装壁の入射効率、振動伝達効率及び放射効率を変えたりして算定し直すことを特徴としており、遮音性能を最適な状態で達成する効果を奏している。
【図面の簡単な説明】
【 図１】本発明による隣接室間の遮音性能評価方法を適用する隣接室の概要平面図
【 図２】本発明によって隣接室間の遮音性能を評価するための算定フロー図
【 図３】本発明によって算定した隣接室間の遮音性能を許容値に対処させるための検討フロー図
【 図４】音源室側の内装壁と側壁に対する音圧の伝搬形態図
【 図５】音源室側の側壁における振動の伝搬形態図
【 図６】側壁に形成される戸境壁との交差部
【 図７】受音室側の側壁と内装壁における振動の伝搬形態図
【 図８】受音室側の内装壁における振動の伝搬減衰図
【 図９】本発明による隣接室間の遮音性能評価方法の実施の形態における算定結果
【 図１０】側壁の交差部特性を変更するための実施の形態図
【 図１１】側壁の交差部特性を変更するための他の実施形態図
【 図１２】従来の隣接室間の遮音性能を評価する方式を適用する隣接室の概要平面図
【 図１３】従来の隣接室間の遮音性能を評価するための算定フロー図
【符号の説明】
１ 音源室、 ２ 受音室、 ３ 戸境壁、 ４
５ 窓、ドア等の開口部、 ６ 内装壁、 ７ 下地材、 ８ 交差部、
９ 交差部の音源室側境界面、 ９’ 交差部の受音室側境界面、
１０〜２７ 遮音性能を評価する設定と算定項目、
２８ 必要対策量の算定、３０ 必要対策の検討、 ３１〜３５ 検討対策、
１０１ 戸境壁、 １０２ 側壁、 １０３ スリット、 １０４ 内装壁、
１０５ 内装下地材、 １０６ ボイド状押出成形版、 １０７ ボイド、
（イ）戸境壁の直接透過音、
（ロ） 窓、ドア等の開口部からの迂回伝搬音、
（ハ） 側壁固体伝搬音、[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for evaluating the sound insulation performance between adjacent rooms and the selected side wall, and in particular, quantitatively evaluates the sound insulation performance of the side walls by calculating the side wall solid propagation sound between adjacent rooms as a vibration acceleration level propagating inside the side walls. It relates to a sound insulation performance evaluation method between adjacent rooms and selected side walls.
[0002]
[Prior art]
The layout of the housing complex is arbitrarily determined by the designer, and the length of the side wall connected to the doorway wall between adjacent dwellings is also dedicated to clearing the fire protection restrictions. On the other hand, when designing sound insulation between houses, studies focusing on the sound insulation performance of the door wall and side walls are generally made, but it was expected even when using a door wall with high sound insulation performance There are many problems that performance cannot be secured.
[0003]
These problems are caused by the sound propagation path between adjacent rooms that are partitioned by the boundary wall and surrounded by the side wall that intersects the boundary wall. This is because the influence of side-channel propagation sound cannot be ignored. Especially in the current situation where the length of the side wall connected to the doorway wall is determined as described above, Thorough examination is necessary.
[0004]
In the conventional prediction of sound insulation performance, adjacent rooms to be evaluated for sound insulation performance are set as a sound source room 1 and a sound receiving room 2 as shown in FIG. It is assumed that the side wall 4 straddling both chambers is arranged in a form intersecting with the door wall 3 so as to be entirely enclosed in a sealed state.
[0005]
In the sound insulation performance prediction flow, the sound pressure level is set in the sound source room 1 between the adjacent rooms, and the sound pressure level propagating from the sound source room 1 to the sound receiving room 2 is as shown in FIG. It is assumed that the sound is transmitted for each route of the direct transmitted sound from the door wall 3 (b), the detour propagation sound (b) from the opening 5 such as a window or door, and the side wall solid propagation sound (c). The sound pressure level of the sound receiving room was calculated by synthesizing the sound pressure levels calculated individually for each route.
[0006]
Since the sound insulation performance is a difference in sound pressure level between adjacent rooms, the sound insulation performance between adjacent rooms to be evaluated is calculated by calculating the sound pressure level in the sound source room 1 and each route. The sound pressure level determined to propagate to the chamber 2 is determined based on the difference from the synthesized sound pressure level in the sound receiving chamber 2 where the sound pressure level is synthesized.
[0007]
For this reason, it was necessary to calculate the sound pressure level propagating for each route, but the direct transmitted sound (a) from the door wall 3 and the detour propagation sound (ro) from the openings 5 such as windows and doors. ) Has been studied relatively, but the side wall solid sound has not been fully investigated.
[0008]
The conventional side wall solid propagation sound (c) is based on an actual measurement value obtained by measuring the vibration acceleration level at an arbitrary point on the side wall of the sound receiving chamber or the sound pressure level generated from the side wall on the sound receiving chamber side. In addition to coping with it, the countermeasures are limited to changing the base material 7 of the interior wall 6, and the pursuit and countermeasures for other parts have not been studied.
[0009]
Also, for the side wall solid sound calculated based on the actually measured vibration acceleration level, the sound pressure level radiated from the side wall surface on the sound receiving chamber side is proportional to the total surface area on the side wall on the sound receiving chamber side. Since it was calculated, the effect was overestimated as a result, which caused the response to the actual situation to deteriorate.
[0010]
As described above, the calculation of the sound insulation performance between adjacent rooms surrounded by the side wall that intersects the boundary wall of the partition in the past was predicted by an inconsistent calculation flow accompanied by actual measurement work. Even if a material with good sound insulation performance is applied to the wall and side walls, the initial performance is often not established, and there is no need for ancillary work such as actual measurement, and the material and structure of the door wall and side wall are not required. There is a need for a simple calculation flow that can calculate the sound pressure level to be propagated only by adopting a quantitative value based on this, and the sound pressure level in each route is calculated quantitatively and evaluated based on this. There has been a demand for the development of means for easily selecting a side wall that can determine the sound insulation performance between adjacent rooms by comparing the sound insulation performance with a set allowable value.
[0011]
[Problems to be solved by the invention]
The present invention is proposed in view of the above situation, and the side wall on the sound receiving chamber side is propagated while propagating through the side wall by propagating the propagating side wall solid propagating sound to the sound source chamber side sound pressure. By calculating the sound pressure level on the sound receiving room side as radiating from the sound, it is possible to quantitatively calculate and evaluate the sound insulation performance between adjacent rooms surrounded by the side wall that intersects the partition wall of the partition It provides sound insulation performance evaluation method between adjacent rooms and selected side walls.
[0012]
[Means for Solving the Problems]
  The method for evaluating the sound insulation performance between adjacent rooms according to the first aspect of the present invention is the sound pressure level of the sound source room between adjacent rooms partitioned by a door wall and surrounded by a side wall intersecting the door wall. The sound of the sound receiving room is calculated by calculating the sound pressure level transmitted to the sound receiving room as the sound pressure of the sound source room directly transmitted through the wall of the door, detoured sound from windows and doors, and side wall solid sound. In the sound insulation performance evaluation method between adjacent rooms, which is determined by the difference from the pressure level, the sound pressure level of the propagation sound transmitted through the side wall of the side wall is determined by the sound pressure of the sound source room entering the side wall on the sound source room side. Sound pressure level that propagates while being attenuated and radiated from the side wall of the sound receiving roomThe sound pressure level of the propagation sound transmitted through the side wall of the side wall is calculated by converting the sound pressure incident from the side wall surface on the sound source room side into a vibration acceleration level, The ultimate vibration acceleration level reaching the intersection of the sound source room is calculated, the ultimate vibration acceleration level from all the side wall surfaces on the sound source room side is synthesized, and the total ultimate vibration acceleration level is calculated. The transmission vibration acceleration level transmitted through the intersection is calculated by reducing the energy loss, and the inside of the side wall of the sound reception room is attenuated from the intersection with the door boundary wall based on the transmission vibration acceleration level. The vibration acceleration level that reaches the radiation point on the side wall surface is calculated, and the vibration acceleration level is converted into a sound pressure for each radiation point and synthesized to calculate the sound pressure level emitted from the entire side wall surface on the sound receiving room side. RuThe sound that propagates from the sound source room to the sound receiving room is quantitatively calculated and synthesized for each route of the directly transmitted sound of the doorway wall, the detour propagation sound from the opening, and the side wall solid propagation sound. By calculating the sound pressure level of the sound receiving room, the sound insulation performance between adjacent rooms can be calculated and evaluated quantitatively.
[0013]
  Also, the sound pressure level of the propagating side wall solid propagation sound isSound pressure incident from the sound source room side wall surface is converted into vibration acceleration level, and the ultimate vibration acceleration level reaching the intersection with the doorway wall is calculated while internally attenuated at each incident point. The total vibration acceleration level is calculated by combining the vibration acceleration levels reached from the side wall surface, and the transmission vibration acceleration level transmitted through the intersection is calculated by subtracting the energy loss due to the intersection characteristics from the total vibration acceleration level. Based on the vibration acceleration level, the vibration acceleration level reaching the radiation point on the side wall surface of the sound receiving room is calculated while internally attenuating the inside of the sound receiving room side wall from the intersection with the boundary wall, and the vibration acceleration level is calculated as the radiation point. In addition to the above functions, the sound insulation performance between adjacent rooms is calculated by converting to sound pressure every time and synthesizing and calculating the sound pressure level radiated from the entire side wall surface on the sound receiving room side. It can be calculated by the body forms.
[0014]
  Claim 2The sound insulation performance evaluation method between adjacent rooms which is the invention ofClaim 1In the sound insulation performance evaluation method between adjacent rooms, the total ultimate vibration acceleration level is calculated by the following formula. In addition to the above functions, the total ultimate vibration acceleration level at the intersection with the boundary wall is quantified. Can be calculated automatically.
[0015]
VAL_S= Σ (VAL_SO-Α × √f × L_i) (DB)
However, VAL_S: Total ultimate vibration acceleration level
VAL_SO: Vibration acceleration level at the incident point
α: Internal damping coefficient of vibration propagating in the side wall
f: Frequency
L_i : Distance from incident point to boundary surface located on extension line of sound source room side boundary wall
[0016]
  Claim 3The sound insulation performance evaluation method between adjacent rooms which is the invention ofClaim 1 or 2In the sound insulation performance evaluation method between adjacent rooms, the vibration acceleration level at the radiation point is calculated by the following formula. In addition to the above functions, the radiation acceleration level at the intersection with the doorway wall is radiated. The vibration acceleration level of a point can be calculated quantitatively.
[0017]
VAL_rS= Σ (VAL_{r 0}-Α × √f × D_i) (DB)
However, VAL_rS: Vibration acceleration level at radiation point
VAL_rO： Transmission vibration acceleration level on the sound receiving room side wall that has passed through the intersection
α: Internal damping coefficient of vibration propagating in the side wall
f: Frequency
D_i ： Distance from the radiation point to the boundary surface located on the extension line of the sound receiving room side boundary wall
[0018]
  Claim 4The sound insulation performance evaluation method between adjacent rooms which is the invention of4. The method according to any one of claims 1 to 3.In the method for evaluating sound insulation performance between adjacent rooms, the vibration acceleration level at the sound pressure incident point on the side wall on the sound source room side is set to the sound pressure level of the sound source room, and the incident efficiency of the interior wall laid on the indoor surface of the side wall is set. In addition to the above functions, it is characterized in that the calculation is taken into account. Specifically, the influence of the interior walls is specifically made to improve the quantitativeness of the sound insulation performance between adjacent rooms.
[0019]
  Claim 5The sound insulation performance evaluation method between adjacent rooms which is the invention of5. The method according to any one of claims 1 to 4.In the method for evaluating the sound insulation performance between adjacent rooms, the vibration acceleration level transmitted to the interior wall surface on the sound receiving room side is changed to the vibration acceleration level at the radiation point of the side wall, and the vibration to the interior wall laid on the indoor surface of the side wall In addition to the above functions, it is characterized in that the transmission efficiency is taken into account, and in addition to the above functions, the influence of the interior walls is made concrete to improve the quantitativeness of the sound insulation performance between adjacent rooms.
[0020]
  Claim 6The sound insulation performance evaluation method between adjacent rooms which is the invention ofClaim 5In the sound insulation performance evaluation method between adjacent rooms, the sound pressure level radiated from the interior wall on the sound receiving room side is calculated by taking into account the radiation efficiency of the interior wall to the vibration acceleration level transmitted to the interior wall In addition to the above functions, the effect of the interior walls is specifically made to improve the quantitativeness of the sound insulation performance between adjacent rooms.
[0021]
  Selected sidewalls according to the present invention are:The method according to claim 1.Using the sound insulation performance evaluation method between adjacent rooms, the sound insulation performance between adjacent rooms is evaluated by comparing the sound pressure level on the sound source room side with the calculated sound pressure level on the sound receiving room side. In order to achieve the permissible value, a slit that penetrates in the thickness direction of the doorway wall is formed in the crossing direction on the side wall of the crossing point with the doorway wall as necessary. It can be formed along the cross section to change the cross section characteristics, and the side wall can be formed with a voided extrusion plate to change the cross section characteristics and the vibration damping property transmitted through the side wall, or the incident efficiency, vibration transmission efficiency and radiation of the interior wall. It is characterized by recalculation by changing the efficiency, etc., and achieves sound insulation performance in an optimal state.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
The sound insulation performance evaluation method between adjacent rooms according to the present invention includes a sound pressure level of a sound source room and a sound pressure of a sound source room between adjacent rooms partitioned by a door wall and surrounded by a side wall intersecting the door wall. Depending on the difference from the sound pressure level of the sound receiving room, which is calculated and synthesized from the sound pressure level propagated to the sound receiving room as direct transmitted sound through the doorway wall, detour propagation sound from windows and doors and side wall solid sound In the method for evaluating the sound insulation performance between adjacent rooms, the sound pressure level of the propagation sound transmitted through the side wall is propagated while the sound pressure in the sound source room is incident on the side wall on the sound source room and is attenuated internally. The sound pressure level radiated from the side wall on the sound receiving room side is calculated.
[0023]
In the following, the flow of calculating the sound insulation performance between adjacent rooms will be described in detail with reference to the drawings for the embodiment of the present invention, but the same reference numerals as those in the conventional example are used for the portions constituting each room. .
[0024]
FIG. 1 is a plan view of adjacent rooms to which the present invention is applied. The configuration between adjacent rooms for evaluating sound insulation performance is set to a sound source room 1 and a sound receiving room 2.
[0025]
The sound source room 1 and the sound receiving room 2 are partitioned by a door wall 3 and a side wall 4 is disposed across the two rooms in a form intersecting the door wall 3. An opening 5 such as a door is provided, and an interior wall 6 of a normal base material 7 is provided on the inner surface thereof. When the floor slab is regarded as a side wall, the interior is enclosed in a hermetically sealed manner. Yes.
[0026]
An arbitrary sound pressure level is set on the sound source chamber 1 side, and a considerable sound pressure is transmitted from the sound source chamber 1 side to the sound receiving chamber 2 side through each member. Therefore, the directly transmitted sound (A) from the doorway wall 3 and the detour propagation sound (B) from the opening 5 are calculated according to the same calculation flow as in the prior art.
[0027]
The characteristics of the sound insulation performance evaluation method according to the present invention have been sufficiently investigated in the conventional sound insulation performance evaluation between adjacent rooms formed by intersecting the door boundary walls as described above and surrounded by side walls straddling both rooms. By theoretically elucidating the unaccompanied solid-borne sound, the sound pressure level to be transmitted is quantitatively calculated without the need for actual measurement work as in the past, thereby improving the sound insulation performance between adjacent rooms. It can be confirmed easily.
[0028]
2 and 3 show a sound insulation performance evaluation method between adjacent rooms according to the present invention and a sound insulation structure selection flow for reliably selecting a side wall using the method. As described above, according to the present invention, The direct calculation sound (a) from the wall 3 and the detour propagation sound (b) from the opening 5 employ the same calculation method as in the prior art, so the explanation of the relationship is kept to a minimum.
Hereinafter, an embodiment of the present invention will be described according to the flow shown in FIG.
[0029]
10. Setting of sound pressure levels (SPLs) in the sound source room
The sound pressure level (SPLs) set in the sound source room 1 is set for each 125 Hz to 2 KHz band (1/1 octave band) that is a target frequency of sound insulation performance in a building.
[0030]
Since the sound insulation performance is a difference in sound pressure level between the sound source room 1 and the sound receiving room 2, the sound pressure level to be set may be an arbitrary numerical value, but is set to 100 dB in the present embodiment.
[0031]
11. Setting the incident efficiency level (In) of the interior wall
The interior wall 6 is vibrated and propagated to the side wall 4 by the sound pressure generated by the sound source room 1, and the degree of vibration propagation to the side wall 4 at this time is defined as the incident efficiency level (In). The value is displayed as a dB value.
[0032]
Since this value varies depending on the members constituting the side wall, it is a value measured in advance in a laboratory or in the field. In this embodiment, the value is stored in the “incidence efficiency DB” database. Thus, the incident efficiency level (In) corresponding to the set interior wall 6 can be selected and used.
[0033]
Table 1 is an example of data stored in “incidence efficiency DB”.
[0034]
[Table 1]

[0035]
(T = * 1) and (t = * 2) in the above table exemplify that the wall thickness t is * 1, * 2, and ALC plate + GL etc. are GL bonded to the interior surface of the ALC plate. The side wall etc. which laid etc. are displayed similarly.
[0036]
12 Calculation of vibration acceleration level (VALso) at the incident point
Since the interior wall 6 is supported by the base material 7 arranged at regular intervals, as shown in a partially enlarged view in FIG. 4, the incident efficiency level (In) described above is as shown in Table 1. In addition, it is set for each type of base material.
[0037]
The vibration generated at the side wall follows the propagation path of the surface of the interior wall 6 → the base material 7 → the side wall 4, so the calculation position of the vibration acceleration level at the incident point is the connection position of the side wall 4 and the base material 7. When the base material is provided over the front surface of the side wall without being spaced apart like the GL bond shown in FIG. 4, the incident point is infinite.
[0038]
Therefore, the vibration acceleration level (VALso) at the incident point is calculated for each frequency by the following equation.
VALso = SPLs + In
[0039]
13. Total ultimate vibration acceleration level (VAL_S)
The side wall 4 on the side of the sound source room 1 intersects with the door wall 3 to form an intersection 8 as shown in a partially enlarged view in FIG. 5 and is arranged at the incident points (1) to (6). Since the individual propagation paths are formed on the side wall 4 via the underlying base material 7, vibrations generated on the side walls follow these propagation paths and the sound source room side on the sound source room side of the intersection 8. It is transmitted to the boundary surface 9 located on the extension line of the door boundary wall surface.
[0040]
The value of the ultimate vibration acceleration level at the boundary surface 9 is calculated in consideration of the internal damping coefficient (α) with respect to the vibration of the side wall 4 from the calculated vibration acceleration level (VALso) at the incident point. 9 Total reached vibration acceleration level (VAL_S) Is obtained by the following equation, which is a combination of vibrations propagating from the input positions of the vibrations individually generated on the side wall 4.
[0041]
VAL_S= Σ (VALso−α√f · L_i)
However, VAL_S: Total ultimate vibration acceleration level
VAL_SO: Vibration acceleration level at the incident point
α: Internal damping coefficient of vibration propagating in the side wall
f: Frequency
L_i : Distance from incident point to boundary surface located on extension line of sound source room side boundary wall
[0042]
In the above calculation formula, the vibration acceleration level at the incident points (1) to (6) is the same because a diffused sound field is formed in the sealed room and the sound pressure level incident on the side wall surface is substantially constant. As examples of the internal damping coefficient (α), numerical values of ALC plate: 0.25, concrete plate: 0.03, and voided extruded plate: 0.15 are known.
[0043]
14 Crossing attenuation (Δk) setting
As shown in a partially enlarged view in FIG. 6, the side wall 4 intersects the door boundary wall 3 to form an intersection 8, and the intersection 8 has a boundary surface 9 on the sound source room side and a sound receiving room side. A boundary surface 9 'is formed.
[0044]
Since energy loss occurs due to the intersection characteristic between the sound source room side boundary surface 9 and the sound receiving room side boundary surface 9 ′, it is necessary to set an intersection attenuation amount (Δk).
[0045]
Although this attenuation amount (Δk) at the intersection varies depending on the members constituting the side wall, it can be obtained in advance by measurement in the laboratory or on-site, and is stored as a database in “Cross Attenuation DB”. The attenuation of the selected side wall 4 can be selected.
An example of database contents is shown in Table 2.
[0046]
[Table 2]

[0047]
(T = * 1) to (t = * 4) in the above table exemplify that the wall thickness t is * 1 to * 4. In the case of an ALC plate slit (D = * 2), ALC In the side wall of the plate, a slit having a width * 2 penetrating in the thickness direction of the side wall is provided at the intersection with the door wall.
[0048]
15. Transmission vibration acceleration level (VAL_ro)
Total ultimate vibration acceleration level (VAL_S) From the value of transmission vibration acceleration level (VAL) at the boundary surface 9 'on the sound receiving room side according to the following equation:_ro)
VAL_ro= VAL_S-Δk
[0049]
16. Vibration acceleration level at the radiation point (VAL_r)
In the present embodiment, as shown in a partially enlarged view in FIG. 7, the interior wall 6 is supported by the base material 7 arranged at regular intervals on the side wall 4 on the sound receiving chamber 2 side. Individual propagation paths are formed at points {circle around (1)} to {circle around (6)} where the base material 7 is disposed from the intersection 8 with the reference numeral 3.
[0050]
Therefore, the vibration from the boundary surface 9 ′ on the sound receiving room side of the intersection 8 is propagated to the positions {circle around (1)} to {circle around (6)} that are the radiation points of the side wall 4 along these propagation paths.
[0051]
From this, the vibration acceleration level at the radiation point (VAL)_r) Is the transmitted vibration acceleration level (VAL) at the boundary surface 9 '._ro) Based on the following equation in consideration of the internal damping coefficient (α) for the vibration of the side wall 4.
[0052]
VAL_r= VAL_ro-Α√f · D_i
However, VAL_r  : Vibration acceleration level at radiation point
VAL_rO： Transmission vibration acceleration level on the sound receiving room side wall that has passed through the intersection
α: Internal damping coefficient of vibration propagating in the side wall
f: Frequency
D_i ： Distance from the radiation point to the boundary surface located on the extension line of the sound receiving room side boundary wall
[0053]
As described above, in the sound insulation performance evaluation method according to the present invention, the value of the vibration acceleration level (VALr) on the side wall surface is calculated by a method of combining the internally attenuated values corresponding to the distance from the boundary surface 9 ′. Therefore, it provides a value that conforms to the actual situation.
[0054]
This means that the average vibration acceleration level (VAL) and the radiation area level (10 log) within the radiation area of the sound pressure from the side wall of the sound receiving room._TenS) (where S is the side wall area of the sound receiving room) and the total vibration acceleration level (VAL) of the interior wall is calculated, and the vibration acceleration level of the radiation area that does not actually contribute also affects the composite level. As a calculation, it was a factor that greatly deviated in calculation accuracy from the conventional calculation method that selected a value different from the actual value.
[0055]
As described above, the internal damping coefficient (α) of the vibration propagating in the side wall in each of the above calculation formulas is as follows: ALC plate: 0.25, concrete plate: 0.03, void-like extruded plate: 0.0. 15.
[0056]
17. Setting of vibration transmission level (ΔT)
As in the present embodiment, the propagation path of (1) to (6) is formed by the base material 7 arranged at regular intervals, and the vibration of the side wall 4 is caused by the side wall 4 → the base material 7 → the interior wall 6. When tracing the propagation path such as the surface, the vibration transmission level (ΔT) corresponding to the base material 7 is taken into account in order to calculate the vibration acceleration level on the surface of the interior wall 6.
[0057]
The value of the vibration transmission level (ΔT) is a value measured in advance in the laboratory or on the site for the side wall composed of different members. In this embodiment, the vibration transmission level (ΔT) is converted into a database of “vibration transmission DB”. By storing it, the vibration transmission level (ΔT) corresponding to the set base material 7 can be selected and used.
Table 3 is an example of data stored in “vibration transmission DB”.
[0058]
[Table 3]

[0059]
(T = * 1) and (t = * 2) in the above table exemplify that the wall thickness t is * 1, * 2, and ALC plate + GL etc. are GL bonded to the interior surface of the ALC plate. The side wall etc. which laid etc. are displayed similarly.
[0060]
18. Vibration acceleration level reaching the interior wall (VAL_r1)
Vibration acceleration level reaching the interior wall 6 (VAL_r1) Is calculated using the vibration acceleration level (VAL) at the radiation point._r) Is obtained from the following equation.
VAL_r1= VAL_r+ ΔT
[0061]
19. Vibration acceleration level on interior wall (VAL_rS)
As shown in a partially enlarged view in FIG. 8, in the present embodiment, the interior wall 6 is supported by the base material 7 arranged at a constant interval on the side wall 4 on the sound receiving chamber 2 side. The vibration from the boundary surface 9 'on the sound receiving room side follows the propagation paths formed at the points (1) to (6) where the base material 7 is disposed and becomes the radiation point of the side wall 4 (1) Propagated to the positions of.
[0062]
For this purpose, the vibration acceleration level on the side wall surface (VAL_rS) Have different values calculated as shown in the figure by the internal attenuation corresponding to the distance from the boundary surface 9 '.
[0063]
Therefore, the vibration acceleration level (VAL_rS) Is obtained by the following equation that synthesizes vibrations individually propagating from the radiation point of the side wall 4 at the interior wall.
VAL_rS= ΣVAL_r1
[0064]
As described above, in the sound insulation performance evaluation method of the present invention, the vibration acceleration level (VAL_rS) Is calculated by synthesizing values that are internally attenuated corresponding to the distance from the boundary surface 9 ', so that a value in accordance with the actual value is provided.
[0065]
20. Setting the radiation efficiency level (R) of the interior wall
[0066]
Vibration acceleration level (VAL on the interior wall)_rS) Is defined as the radiation efficiency level (R), and the value is displayed as a dB value.
[0067]
Since this value differs depending on the members constituting the side wall, it is a value measured in advance in the laboratory or on-site, and in this embodiment, it is stored in the “radiation efficiency DB” as a database. Therefore, the radiation efficiency level (R) corresponding to the set combination of the interior wall 6 and the side wall 4 is selected.
Table 4 is an example of data stored in the “radiation efficiency DB”.
[0068]
[Table 4]

[0069]
(T = * 1) and (t = * 2) in the above table exemplify that the wall thickness t is * 1, * 2, and ALC plate + GL etc. are GL bonded to the interior surface of the ALC plate. The side wall etc. which laid etc. are displayed similarly.
[0070]
21. Calculation of equivalent sound absorption area level (Ar)
The sound absorption area is obtained from the chamber surface area and the average sound absorption coefficient of the sound receiving chamber, and the equivalent sound absorption area level (Ar) is calculated.
Ar = 10log_Ten(A)
A: Sound absorption area
[0071]
22. Side wall solid sound (SPL)_r1)
Since the vibration generated in the interior wall follows a propagation path such as the side wall 4 → the base material 7 → the surface of the interior wall 6, the sound pressure level (SPL in the interior wall)_{r 1}) Is calculated for each frequency by the following formula in consideration of the radiation efficiency level (R) of the interior wall.
SPL_r1= VAL_rS+ R-20log_Tenf-A_r+36
[0072]
Based on the above calculations, the sound pressure that the vibration generated by the sound pressure on the sound source room side propagates to the sound receiving room side through the side wall is a value that is measured in advance in the laboratory or on-site and converted into a database. Can be determined as a numerical value in accordance with the actual situation by applying it to the side wall or interior wall that is the object of evaluating the sound insulation performance.
[0073]
In addition, the following calculations required for adding directly transmitted sound (b) from the door boundary wall and bypassing sound (b) from the openings 5 such as windows and doors, which are performed in the same manner as the conventional example, Since it can be developed in the same manner as the conventional sound insulation structure selection flow, only the items are described.
[0074]
23. Directly transmitted sound from the boundary wall (SPL_r2)
[0075]
24. Detour propagation sound from windows and doors (SPL)_{r 3})
[0076]
25. Total sound pressure level in the receiving room (SPL_r)
Total sound pressure level in the receiving room (SPL_r) Is calculated from the above-mentioned side wall solid sound (SPL)._r1), The sound transmitted directly through the door wall (SPL)_r2) And detouring sound from windows and doors (SPL)_{r 3}) Is used to calculate the following formula.
[0077]

[0078]
26. Sound insulation performance between adjacent rooms (D_r)
D_r= SPL_S-SPL_r
[0079]
27. Check with tolerance
The allowable value of the sound insulation performance is normally given as a D value. For example, in the case of D-50, the level in each frequency band is the following numerical value, but the sound insulation performance between adjacent rooms (D_rIf the calculated value of) is greater than or equal to these values, the sound insulation performance is satisfied.
[0080]

[0081]
28. Necessary measures (D_t)
Calculated sound insulation performance (D_r) Is above the values in Table 5 at 125Hz to 2KHz, the sound insulation performance evaluation will be completed, but if it is below this in any band, the necessary countermeasure amount is calculated. Will do.
D_t= D-Dr
[0082]
The sound insulation performance evaluation results shown in FIG. 9 are examples in which the sound insulation performance evaluation method between adjacent rooms according to the present invention is applied to a temporarily selected sound insulation structure.
[0083]
In this embodiment, as a result of the above-described calculation, the sound source SPL_S, Numerical values of main items such as vibration acceleration level of sound source side wall, arrival of intersection boundary surface, transmission vibration acceleration level and solid sound of side wall through interior wall, direct transmitted sound of door boundary wall, windows and doors, etc. As shown in the figure, the sound insulation performance of the present invention does not require complicated work like the actual measurement value at the corresponding work site as in the past, and the calculation of the sound insulation performance according to the present invention. The quantitative sound insulation performance is finally determined by the calculated value.
[0084]
In FIG. 9, the permissible value required as the sound insulation performance is set for each frequency band, and the sound insulation performance calculated for the sound insulation structure temporarily selected is recorded in the item 26. As shown in item 27, a countermeasure amount of 2.5 dB is necessary in the 500 Hz band.
[0085]
Examination of countermeasures against the calculated necessary countermeasure amount will be considered individually for each of the direct transmitted sound of the door-to-wall, detour propagation sound from windows and doors, and side-wall solid sound. The direct transmitted sound from the wall and the detour propagation sound from windows, doors, and the like will be described in consideration of countermeasures similar to those in the past, and thus the description thereof is omitted here.
[0086]
As the examination 30 for countermeasures against the side wall solid sound, five examination countermeasures shown in the flow of FIG. 3 are planned, and it is examined whether or not each of them can be dealt with.
In the following, embodiments and examples of each examination measure will be described.
[0087]
31. Examination of interior base specification change
For the examination, the incident efficiency D.B. , Radiation efficiency D.B. , Vibration transmission DB Calculate the effective amount of countermeasures associated with the specification change, and select the one that satisfies the conditions by checking with the necessary countermeasure amount.
[0088]
In this embodiment, since the original specification of the side wall was the ALC version + GL method, the incident efficiency D.B. , Radiation efficiency D.B. , Vibration transmission DB As a result of examining whether or not it is possible to cope with the required countermeasure amount by obtaining the change when changing from ALC plate + wood base or ALC plate + LGS base from The sound insulation performance tolerance is satisfied in all bands.
[0089]
32. Measures for intersections
For consideration, cross-attenuation D.B. The amount of countermeasures required when slits are provided at the intersections between the side walls and the door-to-door walls, changes in the effects due to changes in specifications such as material and structure, and other measures that affect vibration propagation And select the one that satisfies the conditions.
[0090]
In this embodiment, since the original specification at the intersection of the side wall and the door wall is an ALC version, the cross attenuation D.B. Therefore, the change when changing to other specifications was obtained. The result of the study can be dealt with by inserting a slit at the intersection.
[0091]
33. Examination of crossing attenuation by changing side wall member
For the purpose of examination, the cross attenuation when the side wall member is changed is expressed as cross attenuation D.B. After calculating from the above, calculate the effective amount of countermeasures, check the necessary countermeasures, and select those that satisfy the conditions.
[0092]
34. Examination of combination changes between interior base specifications and measures for intersections
For consideration, incident efficiency DB , Radiation efficiency D.B. , Vibration transmission DB In addition to calculating the countermeasure effect amount due to the specification change, the cross-attenuation D.B. Measures the amount of countermeasure effect when a slit is provided at the intersection of the side wall with the doorway wall, etc., calculates the amount of countermeasure effect when both are combined, checks against the necessary countermeasure amount, and satisfies the condition Select one.
[0093]
35. Examination by changing interior base specifications and side wall materials
Incidence efficiency DB , Radiation efficiency D.B. , Vibration transmission DB The amount of countermeasure effect associated with the change in the interior base specifications is calculated from the above, and the cross attenuation when the side wall member is changed is calculated as the cross attenuation DB. From the above, calculate the countermeasure effect amount, calculate the countermeasure effect amount when both are combined, and check the necessary countermeasure amount to select the one that satisfies the condition.
[0094]
As described above, when the calculated sound insulation performance does not satisfy the allowable values in the entire frequency band, it is necessary to change the material of the interior basement, the intersection between the side wall and the door wall, and the side wall. Based on these combinations, the effectiveness of measures is calculated, and it is evaluated whether the conditions are satisfied by checking the required measures.
[0095]
In the process of evaluation selection, if the conditions are met even if the base material is changed or slits are made at the intersection, the optimum specification will be selected from these countermeasures. Whether to adopt it as a countermeasure will be judged from the design and construction aspects.
[0096]
Therefore, if there is no countermeasure even if recalculating while applying all of the database, the process returns to the original and reexamines the side wall area including the design surface.
[0097]
As described above, the sound insulation performance evaluation method between adjacent rooms according to the present invention is based on the sound pressure level of the sound source room and the sound source room between the adjacent room surrounded by the partitioned boundary wall and the side wall intersecting with this. The sound of the side wall solid propagation sound that is propagated when calculating the sound pressure level that the sound pressure is propagated to the sound receiving room as the direct transmitted sound of the door wall, the detour propagation sound from the window or door, and the side wall solid propagation sound The pressure level is calculated as the sound pressure level at which the sound pressure in the sound source room is incident on the side wall on the sound source room and propagates through the side wall while being attenuated. Quantifying the sound insulation performance between adjacent rooms by simply calculating the sound pressure level propagated by adopting quantitative values based on the material and structure of the door wall and side walls, while eliminating the need for additional work Can be evaluated.
[0098]
In the above-described method for evaluating the sound insulation performance between adjacent rooms, the calculation of the sound pressure level transmitted to the sound receiving room is not considered because the slabs located above and below the adjacent room have little influence on the sound pressure level. It is evaluated according to the conventional practice.
[0099]
Therefore, if necessary, the slab is also regarded as a side wall, and the sound pressure level transmitted to the sound receiving chamber is calculated in the same manner as in the case of the side wall, and the side wall solid propagation sound includes the slab and the side wall. It is also possible to calculate as a thing. In this case, since the small sound pressure level from the slab is finely taken into account, the sound insulation performance can be evaluated more accurately.
[0100]
Further, the selected side wall according to the present invention is a sound receiving chamber calculated using the above sound insulation performance evaluation method with respect to the designed sound insulation structure as described in the above-described embodiment and examples. By comparing the sound pressure level on the side and the sound pressure level on the sound source room side, the sound insulation performance is calculated, and the side wall is selected so that this sound insulation performance value achieves an allowable value.
[0101]
If the sound insulation performance value of the designed sound insulation structure does not achieve the permissible value, in order to achieve the permissible value, the intersection characteristics of the side walls are converted, the incident efficiency of the interior walls, the vibration transmission efficiency The sound insulation performance value is changed by recalculating while converting the radiation efficiency, and the optimum state is selected.
[0102]
In the following, embodiments of selected sidewalls according to the present invention will be described in detail with reference to the drawings.
[0103]
FIG. 10 shows an embodiment for changing the intersection characteristics of the side walls.
As shown in the figure, a slit 103 is formed at the intersecting portion of the side wall 102 that intersects the doorway wall 101. The slit 103 is formed by constructing a side wall with a gap in advance at the intersection, or by cutting the side wall with a circular saw or the like. Whether it is formed in a shape is appropriately selected depending on the necessary countermeasure amount of the sound insulation performance and the material of the side wall.
[0104]
In this embodiment, a slit that penetrates the side wall surface is provided. However, it is not always necessary to penetrate the slit, and if a predetermined characteristic can be obtained, the slit can be formed on the side wall. It is.
[0105]
Similarly, depending on the size of the slit width, whether it is filled with a filler such as glass wool to seal the surface or make a void without filler can be diversified as a numerical example of the database It is.
[0106]
By forming this slit 103, for example, as in the example of the ALC version shown in Table 2, a large numerical value change can be expected in each frequency band, and a countermeasure that can be effectively dealt with according to the necessary countermeasure amount of the sound insulation performance It is.
[0107]
In the figure, reference numeral 104 denotes an interior wall, and reference numeral 105 denotes a base material.
[0108]
FIG. 11 shows another embodiment for changing the cross section characteristic and the internal damping coefficient of vibration propagating in the side wall by changing the side wall.
In the present embodiment, the void-like extrusion molding plate 106 is employed as the side wall, thereby changing the characteristics in vibration propagation of the side wall.
[0109]
The void-shaped extrusion molding plate 106 has a void 107 formed therein. With the formation of the void 107, for example, in the frequency band of 125 Hz, the concrete plate and the ALC plate, as shown in the example of the extrusion molding plate shown in Table 2. In the range from 250 Hz to 2000 Hz, a numerical value larger than that of the ALC version is exhibited, and it is possible to effectively cope with the required amount of sound insulation performance.
[0110]
As described above, the present invention has been described in detail on the basis of the embodiment. However, the sound insulation performance evaluation method between adjacent rooms according to the present invention and the selected side wall are not limited to the above embodiment at all. Attenuation D.B. The diversification of investigation measures that greatly contribute to changes in the effectiveness of countermeasures, such as diversification of structural changes such as providing side walls material and slits at the intersections of side walls, which are stored in the database Naturally, various modifications can be made without departing from the spirit of the invention.
[0111]
【The invention's effect】
  The sound insulation performance evaluation method between adjacent rooms according to claim 1, wherein the sound pressure level of the sound source room and the sound source room are separated between adjacent rooms partitioned by a door boundary wall and surrounded by a side wall intersecting the door boundary wall. The sound pressure level of the sound receiving room is calculated by combining the sound pressure level transmitted directly to the sound receiving room as the sound transmitted directly through the doorway wall, detoured sound from windows and doors, and side wall solid sound. In the method for evaluating the sound insulation performance between adjacent rooms determined by the difference in sound level, the sound pressure level of the propagated side wall solid propagation sound is attenuated inside the side wall by the sound pressure of the sound source room entering the side wall on the sound source room side. As a sound pressure level that propagates and radiates from the side wall of the sound receiving roomThe sound pressure level of the propagation sound transmitted through the side wall of the side wall is calculated by converting the sound pressure incident from the side wall surface on the sound source room side into a vibration acceleration level, The ultimate vibration acceleration level reaching the intersection of the sound source room is calculated, the ultimate vibration acceleration level from all the side wall surfaces on the sound source room side is synthesized, and the total ultimate vibration acceleration level is calculated. The transmission vibration acceleration level transmitted through the intersection is calculated by reducing the energy loss, and the inside of the side wall of the sound reception room is attenuated from the intersection with the door boundary wall based on the transmission vibration acceleration level. The vibration acceleration level that reaches the radiation point on the side wall surface is calculated, and the vibration acceleration level is converted into a sound pressure for each radiation point and synthesized to calculate the sound pressure level emitted from the entire side wall surface on the sound receiving room side. RuThe sound pressure level of the sound receiving room is calculated by quantitatively calculating and synthesizing the sound propagating from the sound source room to the sound receiving room, and the sound insulation performance between adjacent rooms is measured in the field. It has the effect of being able to calculate and evaluate quantitatively without requiring work.
[0112]
  Also, the sound pressure level of the propagating side wall solid propagation sound isSound pressure incident from the sound source room side wall surface is converted into vibration acceleration level, and the ultimate vibration acceleration level reaching the intersection with the doorway wall is calculated while internally attenuated at each incident point. The total vibration acceleration level is calculated by combining the vibration acceleration levels reached from the side wall surface, and the transmission vibration acceleration level transmitted through the intersection is calculated by subtracting the energy loss due to the intersection characteristics from the total vibration acceleration level. Based on the vibration acceleration level, the vibration acceleration level reaching the radiation point on the side wall surface of the sound receiving room is calculated while internally attenuating the inside of the sound receiving room side wall from the intersection with the boundary wall, and the vibration acceleration level is calculated as the radiation point. In addition to the above effects, the sound insulation between adjacent rooms is characterized by the fact that each sound pressure level is converted into sound pressure and synthesized and calculated as the sound pressure level radiated from the entire side wall surface on the sound receiving room side. And provide an advantage that can be calculated in a concrete form to.
[0113]
  Claim 2The sound insulation performance evaluation method between adjacent rooms which is the invention ofClaim 1In the sound insulation performance evaluation method between adjacent rooms, the total ultimate vibration acceleration level is calculated by the following formula. In addition to the above effects, the total ultimate vibration acceleration level at the intersection with the doorway wall is There is an effect that can be calculated quantitatively.
[0114]
VAL_S= Σ (VAL_SO-Α × √f × L_i) (DB)
However, VAL_S: Total ultimate vibration acceleration level
VAL_SO: Vibration acceleration level at the incident point
α: Internal damping coefficient of vibration propagating in the side wall
f: Frequency
L_i : Distance from incident point to boundary surface located on extension line of sound source room side boundary wall
[0115]
  Claim 3The sound insulation performance evaluation method between adjacent rooms which is the invention ofClaim 1 or 2In the sound insulation performance evaluation method between adjacent rooms, the vibration acceleration level at the radiation point is calculated by the following formula. In addition to the above effect, the transmission vibration acceleration level at the intersection with the doorway wall is used. The effect is that the vibration acceleration level at the radiation point can be calculated quantitatively.
[0116]
VAL_rS= Σ (VAL_{r 0}-Α × √f × D_i) (DB)
However, VAL_rS: Vibration acceleration level at radiation point
VAL_rO： Transmission vibration acceleration level on the sound receiving room side wall that has passed through the intersection
α: Internal damping coefficient of vibration propagating in the side wall
f: Frequency
D_i ： Distance from the radiation point to the boundary surface located on the extension line of the sound receiving room side boundary wall
[0117]
  Claim 4The sound insulation performance evaluation method between adjacent rooms which is the invention of4. The method according to any one of claims 1 to 3.In the method for evaluating sound insulation performance between adjacent rooms, the vibration acceleration level at the sound pressure incident point on the side wall on the sound source room side is set to the sound pressure level of the sound source room, and the incident efficiency of the interior wall laid on the indoor surface of the side wall is set. In addition to the above-described effects, the calculation is performed in consideration of the above effects, and the effect of improving the quantification degree of the sound insulation performance between adjacent rooms by specifically affecting the influence of the interior wall is achieved.
[0118]
  Claim 5The sound insulation performance evaluation method between adjacent rooms which is the invention of5. The method according to any one of claims 1 to 4.In the method for evaluating the sound insulation performance between adjacent rooms, the vibration acceleration level transmitted to the interior wall surface on the sound receiving room side is changed to the vibration acceleration level at the radiation point of the side wall, and the vibration to the interior wall laid on the indoor surface of the side wall In addition to the above-described effect, the calculation is performed taking transmission efficiency into account, so that the effect of the interior wall is specifically shown to improve the quantitativeness of the sound insulation performance between adjacent rooms.
[0119]
  Claim 6The sound insulation performance evaluation method between adjacent rooms which is the invention ofClaim 5In the sound insulation performance evaluation method between adjacent rooms, the sound pressure level radiated from the interior wall on the sound receiving room side is calculated by adding the radiation efficiency of the interior wall to the vibration acceleration level transmitted to the interior wall. In addition to the above effect, the effect of the interior wall is specifically shown, and the effect of improving the degree of quantification of the sound insulation performance between adjacent rooms is achieved.
[0120]
  Selected sidewalls according to the present invention are:The method according to claim 1.Using the sound insulation performance evaluation method between adjacent rooms, the sound insulation performance between adjacent rooms is evaluated by comparing the sound pressure level on the sound source room side with the calculated sound pressure level on the sound receiving room side. In order to achieve the permissible value, a slit that penetrates in the thickness direction of the doorway wall is formed in the crossing direction on the side wall of the crossing point with the doorway wall as necessary. It can be formed along the cross section to change the cross section characteristics, and the side wall can be formed with a voided extrusion plate to change the cross section characteristics and the vibration damping property transmitted through the side wall, or the incident efficiency, vibration transmission efficiency and radiation of the interior wall. It is characterized by re-calculating by changing the efficiency, and has the effect of achieving sound insulation performance in an optimal state.
[Brief description of the drawings]
FIG. 1 is a schematic plan view of adjacent rooms to which a sound insulation performance evaluation method between adjacent rooms according to the present invention is applied.
FIG. 2 is a calculation flow chart for evaluating the sound insulation performance between adjacent rooms according to the present invention.
FIG. 3 is a flow chart for examining the sound insulation performance between adjacent rooms calculated according to the present invention to cope with an allowable value.
FIG. 4 is a propagation diagram of sound pressure with respect to the interior wall and the side wall on the sound source room side.
FIG. 5 is a propagation form diagram of vibration on the side wall on the sound source room side.
[Fig. 6] Intersection with the boundary wall formed on the side wall
FIG. 7 is a vibration propagation pattern on the side wall and the interior wall on the sound receiving room side.
[FIG. 8] Vibration attenuation diagram of the interior wall on the sound receiving room side
FIG. 9 shows a calculation result in the embodiment of the method for evaluating the sound insulation performance between adjacent rooms according to the present invention.
FIG. 10 is a diagram showing an embodiment for changing the intersection characteristic of the side wall.
FIG. 11 is a diagram showing another embodiment for changing the intersection characteristic of the side wall.
FIG. 12 is a schematic plan view of adjacent rooms to which a conventional method for evaluating the sound insulation performance between adjacent rooms is applied.
FIG. 13 is a calculation flow chart for evaluating the sound insulation performance between conventional adjacent rooms.
[Explanation of symbols]
1 sound source room, 2 sound receiving room, 3 home wall, 4
5 Openings such as windows and doors, 6 Interior walls, 7 Base materials, 8 Intersections,
9 sound source room side interface at the intersection, 9 'sound receiving room side interface at the intersection,
10 to 27 Settings and calculation items for evaluating sound insulation performance,
28 Calculation of necessary countermeasures, 30 Examination of necessary countermeasures, 31-35 Examination countermeasures,
101 door wall, 102 side wall, 103 slit, 104 interior wall,
105 interior base material, 106 void extrusion molding plate, 107 void,
(A) Directly transmitted sound through the doorway wall,
(B) Detour propagation sound from openings such as windows and doors,
(C) Side wall solid propagation sound,

Claims (10)

The sound pressure level of the sound source room and the sound pressure of the sound source room are directly transmitted through the door boundary wall, windows and doors between adjacent rooms that are partitioned by the door boundary wall and surrounded by the side wall that intersects the door boundary wall. In the sound insulation performance evaluation method between adjacent rooms determined by the difference between the sound pressure level of the sound receiving room and the sound pressure level propagated to the sound receiving room as a detour propagation sound and side wall solid propagation sound from the calculation The sound pressure level of the propagation sound transmitted through the side wall of the sound is radiated from the side wall of the sound receiving room through the sound pressure of the sound source room being incident on the side wall of the sound source room and being attenuated internally. To calculate the pressure level ,
The sound pressure level of the propagating sound transmitted through the side wall of the side wall is converted from the sound pressure incident from the side wall surface on the sound source room side to the vibration acceleration level, and reaches the intersection with the boundary wall while being attenuated internally at each incident point. Calculate the ultimate vibration acceleration level, synthesize the ultimate vibration acceleration level from all the side wall surfaces on the sound source room side, calculate the total ultimate vibration acceleration level, and subtract the energy loss due to intersection characteristics from the total ultimate vibration acceleration level. The transmission vibration acceleration level transmitted through the intersection is calculated, and the radiation point on the side wall surface of the sound receiving chamber is internally attenuated in the side wall on the sound receiving room side from the intersection with the door boundary wall based on the transmission vibration acceleration level. Is calculated as a sound pressure level radiated from the entire side wall surface on the sound receiving room side by converting and synthesizing the vibration acceleration level to sound pressure for each radiation point. Adjoining room Sound insulation performance evaluation method. The sound insulation performance evaluation method between adjacent rooms according to claim 1, wherein the total vibration acceleration level is calculated by the following equation.
VAL _S = Σ (VAL _SO −α × √f × L _i ) (dB)
However, VAL _S : total reached vibration acceleration level VAL _SO : vibration acceleration level at the incident point α: internal damping coefficient of vibration propagating in the side wall f: frequency L _i : on the extension line of the sound source room side wall from the incident point Distance to the boundary surface The method for evaluating the sound insulation performance between adjacent rooms according to claim 1 or 2, wherein the vibration acceleration level at the radiation point is calculated by the following equation.
VAL _rS = Σ (VAL _rO −α × _√f × D _i ) (dB)
However, VAL _rS : Vibration acceleration level at the radiation point VAL _rO : Transmission vibration acceleration level α on the sound receiving room side wall passing through the intersection α: Internal damping coefficient f of vibration propagating in the side wall f: Frequency D _i : Distance from the radiation point to the boundary surface located on the extension line of the receiving wall on the sound receiving room side The vibration acceleration level at the sound pressure incident point on the sound source room side wall is calculated by adding the sound pressure level of the sound source room to the incident efficiency of the interior wall laid on the indoor surface of the side wall. The sound insulation performance evaluation method between adjacent rooms in any one of Claims 1 thru | or 3 . The vibration acceleration level transmitted to the interior wall surface on the sound receiving room side is calculated by taking into account the vibration acceleration level at the radiation point of the side wall and the vibration transmission efficiency to the interior wall laid on the indoor surface of the side wall. The method for evaluating sound insulation performance between adjacent rooms according to any one of claims 1 to 4 . Sound pressure level radiated from the interior wall surface of the receiving room side, according to claim 5, characterized in that is calculated by adding the radiation efficiency of the interior wall to the vibration acceleration level that is transmitted to the interior wall Sound insulation performance evaluation method between adjacent rooms. Assessed by comparing the sound pressure level of the sound insulation performance between adjacent chambers is calculated sound pressure level and the sound receiving chamber side of the sound source chamber side, that shielding sound performance is determined by achieving tolerance The side wall selected using the sound insulation performance evaluation method between adjacent rooms according to any one of claims 1 to 6 . The selected side wall according to claim 7, wherein the side wall of the intersection with the door wall is formed along the direction of the cross with a slit penetrating in the thickness direction of the door wall. The selected side wall according to claim 7, wherein the side wall is formed of a void-shaped extrusion molding plate. Calculation is the sound pressure level of the sound receiving chamber side, incidence efficiency of interior walls in order to achieve an acceptable value, claims 7 to 9, characterized in that it is re-calculated by converting the vibration transmission efficiency and radiation efficiency Selected sidewalls as described in any of the above .

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