Abstract: Iterative NAH (Near-field acoustic holography) with K-space filter is introduced into compensating the normal K-space filtering NAH for the energy loss, which caused by the filtering with K-space filter. The validity and feasibility is proved by the cybernetics, and that is also proved by the results of the numerical simulations. Iterative NAH with K-space filter can overcome the energy loss caused by K-space filtering in normal K-space filtering NAH and correctly identify and localize the sound sources.

Key words: Iterative near-field acoustic holography, K-space filtering, Normal near-field acoustic holography