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markku
Vänta, jag har en mätning på det här...
934 Posts |
 Posted - 2003/02/28 : 12:25:46
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Finsk högtalarproducent och Universitet i Jyväskyläs avdelning för Biologi och Fysisk aktivitet startar forskning hurdan ultraljud uppfattas av människan.
Jag saxar:
quote:
Finnish loudspeaker manufacturer, Penaudio Ltd. has launched a research project concerning ultrasonic sounds in co-operation with University of Jyväskylä, Department of Biology of Physical Activity.
The research has two objectives, firstly it studies if high frequency sounds above the human hearing influence the quality of music subjectively, and secondly, can this be seen in the electric brain waves measured by electroencephalography, EEG. The purpose is to scientifically study whether ultra-tweeters really make a difference in the quality of the music.
Measurements include both objective, physiological and subjective tests. The electrical activity of brain is to be measured during different sound environments, including high-frequency sounds above 22 kHz. Another physiological measure is the heart rate variability, which is the time between two consecutive heartbeats. The heart rate variability is a delicate quantity that indicates a person’s stress state.
The subjective evaluation is carried out by the respondents filling a questionnaire of the sound quality concerning the different sound environments.
Results are expected later this year.
Källan: http://highendnews.tripod.com/news/UltrasonicResearch.htm
Flera av er känner till japansk forskiningsprojekt. Småningom, i slutten av året, får vi veta mera.
Motsvarande projekt på gång i Sverige? Burde väl folk bakom QRS och Mårten Design syssla innom detta fält? Dom driver ju med prestige modeller, någonting ingen finsk högtalarproducent törs drömma om att laga. |
mvh
Markku
I have no special talents. I am only passionately curious. - Albert Einstein 1952
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Edited by - markku on 2003/02/28 12:31:13 |
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