Abstract <p>We consider the inverse problem of determining the oscillation function in the support of a “thin” finite oscillation source in the wave equation based on wave field measurements in a distant plane. By applying the Fourier transform, the problem is reduced to a parametric set of one-dimensional Volterra-like integral equations of the first kind. Conditions for the uniqueness of a solution are established. A numerical algorithm for solving this inverse problem is proposed and investigated. The capabilities and features of the algorithm are illustrated by numerical experiments.</p>