Abstract: The electromagnetic impulse sound-source is a novel device which is capable of radiating high-power wide-band sound pulse with good repetition.In this paper,the functional principle of this device is first analysed from the viewpoint of circuits,and working formulas are obtained for designing such device.The circuitry and construction of a 1000-joule sound-source system are described.The measured results of the sound-source are given,which are in agreement with the theoretical results.