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From this page, we will introduce the research fields using the Acoustic water Tank. The following researchs are being conducted with the purpose of enhancing the stealth performance and survivability of battleships and submarines by reducing underwater radiated noise, self-noise, and acoustic target strength. U.R.N&SELF NOISE research to reduce underwater radiated noise and self-noise. Absorbing and insulation materials research to absorb the noise or block the noise pass through to outside.