For piecewise constant wave speeds built from separated balls, one passive boundary measurement determines both the wave speed and the initial source in 3D, with Hölder stability for a single slower inclusion.
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Uniqueness and stability in determining the wave equation from a single passive boundary measurement
For piecewise constant wave speeds built from separated balls, one passive boundary measurement determines both the wave speed and the initial source in 3D, with Hölder stability for a single slower inclusion.