Conference paper Open Access

Simulator for the reproduction of "Low Sonic Boom"-signatures

Töpken, Stephan; van de Par, Steven


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    <subfield code="a">Sonic Boom</subfield>
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    <subfield code="a">Low Frequency</subfield>
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    <subfield code="a">DAGA 2020</subfield>
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    <subfield code="u">Carl von Ossietzky University Oldenburg, Germany</subfield>
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    <subfield code="a">van de Par, Steven</subfield>
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    <subfield code="a">Simulator for the reproduction of "Low Sonic Boom"-signatures</subfield>
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    <subfield code="a">&lt;p&gt;Supersonic aircraft produce a sonic boom when flying faster than the speed of sound. In order to rule out detrimental&lt;br&gt;
e ects for inhabitants of overflown areas, civil supersonic flights (like the Concorde) were allowed to fly over water only.&lt;br&gt;
Due to progress in aircraft design, the super sonic boom may be reduced considerably in the future. Such &amp;rdquo;Low Sonic&lt;br&gt;
Boom&amp;rdquo;-signatures will be considerably quieter and sound completely di erent compared to conventional sonic booms.&lt;br&gt;
Currently, the sensation and the subjective response of humans to future &amp;rdquo;Low Sonic Boom&amp;rdquo;-signatures is not known.&lt;br&gt;
For an assessment of human responses to &amp;rdquo;Low Sonic Boom&amp;rdquo;-signatures, a Sonic-Boom simulator has been built at the&lt;br&gt;
University of Oldenburg as a pressure chamber with a volume of about 9 m&lt;sup&gt;3&lt;/sup&gt;. Two 18&amp;rdquo; loudspeaker chassis enable the&lt;br&gt;
production of an overpressure of up to 20 Pa for a signature duration of 200 ms. The background noise level in the&lt;br&gt;
chamber is very low (21 dB(A)) and the chamber has a very small reverberation time of T&lt;sub&gt;20&lt;/sub&gt;=0.2 s averaged over octave&lt;br&gt;
bands from 63 Hz to 8 kHz. A vibration platform is installed in the chamber to simulate whole-body vibration that may&lt;br&gt;
occur in connection with &amp;rdquo;Low Sonic Boom&amp;rdquo;-signatures.&lt;/p&gt;</subfield>
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    <subfield code="t">Fortschritte der Akustik - DAGA 2020</subfield>
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