Sound fields and subjective effects of scattering by periodic-type diffusers
Identifieur interne : 002121 ( Main/Exploration ); précédent : 002120; suivant : 002122Sound fields and subjective effects of scattering by periodic-type diffusers
Auteurs : D. Takahashi [Japon] ; R. Takahashi [Japon]Source :
- Journal of sound and vibration [ 0022-460X ] ; 2002.
Descripteurs français
- Pascal (Inist)
English descriptors
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Abstract
Walls and ceilings with quasi-periodic unevenness have often been designed to provide diffuse reflections. As for the shape and the size of this unevenness, with the help of some statistical treatment, it is possible to design effective diffusers with an intended directional pattern; this has great merit in sound fields with respect to spatial aspects. In addition to this spatial property of diffusion, reflection from the surface should not have particular response characteristics that may have a serious effect on our subjective experience. A well-known problem is "colouration" caused by interference between direct and reflected waves, which might create an odd tonal distortion in the case of a surface with periodic unevenness. This may be the reason that creating a periodic series of reflections at the receiver is generally avoided. Two issues need to be addressed: (1) is a periodic structure of reflection a major obstacle in practical use? and (2) to what degree is structural repetition acceptable? Clarification of these matters is necessary in order to design effective diffusers for practical applications. This study examines the physical properties of, and the subjective effects of tonal response to, sound fields caused by scattering from periodic-type diffusers.
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Takahashi</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>Department of Architectural Systems, Graduate School of Engineering, Kyoto University, Yoshida Honmachi</s1><s2>Sakyo-ku, Kyoto 606-8501</s2><s3>JPN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Japon</country><wicri:noRegion>Sakyo-ku, Kyoto 606-8501</wicri:noRegion><orgName type="university">Université de Kyoto</orgName><placeName><settlement type="city">Kyoto</settlement><region type="prefecture">Région du Kansai</region></placeName></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">03-0085520</idno><date when="2002">2002</date><idno type="stanalyst">PASCAL 03-0085520 INIST</idno><idno type="RBID">Pascal:03-0085520</idno><idno type="wicri:Area/PascalFrancis/Corpus">000541</idno><idno type="wicri:Area/PascalFrancis/Curation">000107</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000510</idno><idno type="wicri:doubleKey">0022-460X:2002:Takahashi D:sound:fields:and</idno><idno type="wicri:Area/Main/Merge">002201</idno><idno type="wicri:Area/Main/Curation">002121</idno><idno type="wicri:Area/Main/Exploration">002121</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Sound fields and subjective effects of scattering by periodic-type diffusers</title><author><name sortKey="Takahashi, D" sort="Takahashi, D" uniqKey="Takahashi D" first="D." last="Takahashi">D. Takahashi</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>Department of Architectural Systems, Graduate School of Engineering, Kyoto University, Yoshida Honmachi</s1><s2>Sakyo-ku, Kyoto 606-8501</s2><s3>JPN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Japon</country><wicri:noRegion>Sakyo-ku, Kyoto 606-8501</wicri:noRegion><orgName type="university">Université de Kyoto</orgName><placeName><settlement type="city">Kyoto</settlement><region type="prefecture">Région du Kansai</region></placeName></affiliation></author><author><name sortKey="Takahashi, R" sort="Takahashi, R" uniqKey="Takahashi R" first="R." last="Takahashi">R. Takahashi</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>Department of Architectural Systems, Graduate School of Engineering, Kyoto University, Yoshida Honmachi</s1><s2>Sakyo-ku, Kyoto 606-8501</s2><s3>JPN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Japon</country><wicri:noRegion>Sakyo-ku, Kyoto 606-8501</wicri:noRegion><orgName type="university">Université de Kyoto</orgName><placeName><settlement type="city">Kyoto</settlement><region type="prefecture">Région du Kansai</region></placeName></affiliation></author></analytic><series><title level="j" type="main">Journal of sound and vibration</title><title level="j" type="abbreviated">J. sound vib.</title><idno type="ISSN">0022-460X</idno><imprint><date when="2002">2002</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Journal of sound and vibration</title><title level="j" type="abbreviated">J. sound vib.</title><idno type="ISSN">0022-460X</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Building wall</term><term>Ceiling</term><term>Concert hall</term><term>Diffuse reflection</term><term>Diffuser</term><term>Room acoustics</term><term>Wave reflection</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Acoustique salle</term><term>Salle concert</term><term>Plafond</term><term>Mur</term><term>Diffuseur</term><term>Réflexion diffuse</term><term>Réflexion onde</term><term>4355</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Walls and ceilings with quasi-periodic unevenness have often been designed to provide diffuse reflections. As for the shape and the size of this unevenness, with the help of some statistical treatment, it is possible to design effective diffusers with an intended directional pattern; this has great merit in sound fields with respect to spatial aspects. In addition to this spatial property of diffusion, reflection from the surface should not have particular response characteristics that may have a serious effect on our subjective experience. A well-known problem is "colouration" caused by interference between direct and reflected waves, which might create an odd tonal distortion in the case of a surface with periodic unevenness. This may be the reason that creating a periodic series of reflections at the receiver is generally avoided. Two issues need to be addressed: (1) is a periodic structure of reflection a major obstacle in practical use? and (2) to what degree is structural repetition acceptable? Clarification of these matters is necessary in order to design effective diffusers for practical applications. This study examines the physical properties of, and the subjective effects of tonal response to, sound fields caused by scattering from periodic-type diffusers.</div></front></TEI><affiliations><list><country><li>Japon</li></country><region><li>Région du Kansai</li></region><settlement><li>Kyoto</li></settlement><orgName><li>Université de Kyoto</li></orgName></list><tree><country name="Japon"><region name="Région du Kansai"><name sortKey="Takahashi, D" sort="Takahashi, D" uniqKey="Takahashi D" first="D." last="Takahashi">D. Takahashi</name></region><name sortKey="Takahashi, R" sort="Takahashi, R" uniqKey="Takahashi R" first="R." last="Takahashi">R. Takahashi</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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