「51.残響時間」の編集履歴（バックアップ）一覧に戻る

51.残響時間 - (2005/12/26 (月) 10:13:16) のソース

<p class="MsoNormal" style=
"MARGIN: 0mm 0mm 0pt 18pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1; tab-stops: list 18.0pt">
<span lang="EN-US" style=
"FONT-FAMILY: 'ＭＳ 明朝'; mso-bidi-font-family: 'ＭＳ 明朝'"><span style="mso-list: Ignore">
・<span style=
"FONT: 7pt 'Times New Roman'">　　</span></span></span><span style=
"FONT-FAMILY: 'ＭＳ 明朝'; mso-ascii-font-family: Century; mso-hansi-font-family: Century">残響時間</span><span lang="EN-US"><font face="Century">(reverberation　time)</font></span></p>
<p class="MsoNormal" style="MARGIN: 0mm 0mm 0pt"><span style=
"FONT-FAMILY: 'ＭＳ 明朝'; mso-ascii-font-family: Century; mso-hansi-font-family: Century">
ある定常状態の音場において、音源を止めたときに定常状態の音圧から</span><span lang="EN-US"><font face="Century">60dB</font></span><span style="FONT-FAMILY: 'ＭＳ 明朝'; mso-ascii-font-family: Century; mso-hansi-font-family: Century">減衰</span><span lang="EN-US"><font face="Century">(</font></span><span style="FONT-FAMILY: 'ＭＳ 明朝'; mso-ascii-font-family: Century; mso-hansi-font-family: Century">エネルギー密度が</span><span lang="EN-US"><font face="Century">100</font></span><span style="FONT-FAMILY: 'ＭＳ 明朝'; mso-ascii-font-family: Century; mso-hansi-font-family: Century">万分の</span><span lang="EN-US"><font face="Century">1)</font></span><span style="FONT-FAMILY: 'ＭＳ 明朝'; mso-ascii-font-family: Century; mso-hansi-font-family: Century">するのに要する時間。</span></p>
<p class="MsoNormal" style="MARGIN: 0mm 0mm 0pt"><span style=
"FONT-FAMILY: 'ＭＳ 明朝'; mso-ascii-font-family: Century; mso-hansi-font-family: Century">
測定法に関しては下記ページ参照</span></p>
<p class="MsoNormal" style="MARGIN: 0mm 0mm 0pt"><span lang="EN-US"><a href=
"http://tosa.mri.co.jp/sounddb/reverb/"><font face=
"Century">http://tosa.mri.co.jp/sounddb/reverb/</font></a></span></p>
<p class="MsoNormal" style="MARGIN: 0mm 0mm 0pt"><span style=
"FONT-FAMILY: 'ＭＳ 明朝'; mso-ascii-font-family: Century; mso-hansi-font-family: Century">
＊</span><span lang="EN-US"><font face=
"Century">60dB</font></span><span style="FONT-FAMILY: 'ＭＳ 明朝'; mso-ascii-font-family: Century; mso-hansi-font-family: Century">＝オーケストラの音楽演奏の最大</span><span lang="EN-US"><font face="Century">(100dB)</font></span><span style="FONT-FAMILY: 'ＭＳ 明朝'; mso-ascii-font-family: Century; mso-hansi-font-family: Century">－人の話し声</span><span lang="EN-US"><font face="Century">(40dB)</font></span></p>
<p class="MsoNormal" style="MARGIN: 0mm 0mm 0pt"><span lang=
"EN-US">Sabineの残響公式：Ｔ=ＫＶ/Ａ<br>
Eyringの残響公式：Ｔ=ＫＶ/-Ｓln(1-α)<br>
<span style=
"FONT-SIZE: 10.5pt; FONT-FAMILY: 'ＭＳ 明朝'; mso-bidi-font-family: 'Times New Roman'; mso-ascii-font-family: Century; mso-hansi-font-family: Century; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: JA; mso-bidi-language: AR-SA">
空気吸収を考慮した場合、</span><span lang="EN-US" style=
"FONT-SIZE: 10.5pt; FONT-FAMILY: Century; mso-bidi-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: JA; mso-bidi-language: AR-SA; mso-fareast-font-family: 'ＭＳ 明朝'">Knudsen-Eyring</span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'ＭＳ 明朝'; mso-bidi-font-family: 'Times New Roman'; mso-ascii-font-family: Century; mso-hansi-font-family: Century; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: JA; mso-bidi-language: AR-SA">の残響公式を用いる</span></span></p>
<p class="MsoNormal" style="MARGIN: 0mm 0mm 0pt">