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SUMMARY:Inverse Scheme for Acoustic Source Localization based on Adjoint M
ethod
DTSTART;VALUE=DATE-TIME:20191108T091000Z
DTEND;VALUE=DATE-TIME:20191108T094000Z
DTSTAMP;VALUE=DATE-TIME:20200808T235700Z
UID:indico-contribution-41@conference2.aau.at
DESCRIPTION:Speakers: Manfred Kaltenbacher ()\nWe propose an inverse schem
e for acoustic source localization based on solving the corresponding part
ial differential equation in the frequency domain (Helmholtz equation) by
applying the Finite Element (FE) method. This allows us to fully take into
account the actual boundary conditions as given in the measurement setup.
To recover the source locations\, an inverse scheme based on a sparsity p
romoting Tikhonov functional to match measured (microphone signals) and si
mulated pressure is proposed. Since the differential operators for the sta
te equation and the adjoint equation are the same\, the FE system matrix f
or both partial differential equations is the same\, which results in a co
mputational highly efficient solution process. Furthermore\, the computati
onal time does not depend on the number of microphones nor on the assumed
number of possible sources. Finally\, the inverse scheme results in a sour
ce map both for amplitude and phase and in addition the reconstructed acou
stic field is provided. The properties of this inverse scheme and its appl
icability to source localization in the low frequency range will be demons
trated.\n\nhttps://conference2.aau.at/event/16/contributions/41/
LOCATION:Stiftungssaal K.0.01
URL:https://conference2.aau.at/event/16/contributions/41/
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