2. The method of claim 1 , further comprising: applying an array process on said two input speeches to enhance sound received from a direction indicated by said CSP coefficients, and applying said spectrum subtraction process to the result of said array process.
2. The method of claim 1 , further comprising: applying an array process on said two input speeches to enhance sound received from a direction indicated by said CSP coefficients, and applying said spectrum subtraction process to the result of said array process. 3. The method of claim 2 , wherein said array process is a delay-sum array process using said two input speeches.