Sound coloration from (very) early reflections
Identifieur interne : 000061 ( PascalFrancis/Curation ); précédent : 000060; suivant : 000062Sound coloration from (very) early reflections
Auteurs : Tor Halmrast [Norvège]Source :
- The Journal of the Acoustical Society of America [ 0001-4966 ] ; 2001-05-01.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
Coloration is defined as changes in Timbre/Klangfarbe. Adding a reflection automatically changes the frequency response of a signal, giving some kind of coloration. This might be looked upon as distortion. However, reflections have been a part of sound distribution since the Greek amphitheatres, indicating that some coloration must be acceptable, even wanted. The question is: Which reflections give disturbing/unwanted coloration? Most room-acoustic criteria assume that everything happening before/after a certain time is supposed to be good/bad (e.g., 50 ms/80 ms for speech/music). We need to take a closer look at the distribution of reflections within these time intervals, to investigate coloration. This paper will give results from measurements in concert halls (Oslo, Munich, Vienna), and opera houses, and compare them with psychoacoustic studies on coloration. It is shown that measurements should be done with the orchestra present on the stage/in the orchestra pit (TOR, through orchestra impulse response). Lonesome/strong reflections with a time delay about 10 ms will give box-klang-coloration. On the other side, colorating reflections might be useful and fun, used in the right way, to support bass instruments, etc. [J. Sound Vib. 232 (2000)].
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N-0032, Oslo</wicri:regionArea></affiliation></author></analytic><series><title level="j" type="main">The Journal of the Acoustical Society of America</title><title level="j" type="abbreviated">J. Acoust. Soc. Am.</title><idno type="ISSN">0001-4966</idno><imprint><date when="2001-05-01">2001-05-01</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">The Journal of the Acoustical Society of America</title><title level="j" type="abbreviated">J. Acoust. Soc. Am.</title><idno type="ISSN">0001-4966</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Experimental study</term><term>Theoretical study</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>4355H</term><term>Etude expérimentale</term><term>Etude théorique</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Coloration is defined as changes in Timbre/Klangfarbe. 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Lonesome/strong reflections with a time delay about 10 ms will give box-klang-coloration. On the other side, colorating reflections might be useful and fun, used in the right way, to support bass instruments, etc. [J. Sound Vib. 232 (2000)].</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0001-4966</s0></fA01><fA02 i1="01"><s0>JASMAN</s0></fA02><fA03 i2="1"><s0>J. Acoust. Soc. Am.</s0></fA03><fA05><s2>109</s2></fA05><fA06><s2>5</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>Sound coloration from (very) early reflections</s1></fA08><fA11 i1="01" i2="1"><s1>HALMRAST (Tor)</s1></fA11><fA14 i1="01"><s1>Statsbygg, P.O. Box 8106, Dept. N-0032, Oslo, Norway</s1><sZ>1 aut.</sZ></fA14><fA20><s2>p. 2303</s2></fA20><fA21><s1>2001-05-01</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA43 i1="01"><s1>INIST</s1><s2>129</s2></fA43><fA44><s0>8100</s0><s1>© 2001 American Institute of Physics. 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