| 摘要 |
PURPOSE:To obtain sound signals which are optionally adjustable in not only sound pressure but also phase characteristic by providing a setting means setting the frequency band, the delay time of the delay means and the coefficient of the arithmetic means in a digital signal processing circuit. CONSTITUTION:A digital input acoustic signal from an A/D converter circuit 2 is inputted to n-set of digital signal processing circuits 3(1)-3(n). A key matrix 8 is controlled to set the frequency band to obtain a desired frequency characteristic, an output level of the band and an output delay time. Based on the designated content, a micro computer 7 reads a data determining the characteristics from a ROM 6 to send coefficients a1-am, b to multipliers 32(1)-32(m) and an arithmetic circuit 36 and to send a switching signal to a selector 35 selecting a terminal to obtain a required delay time among terminals of delay circuits 34(1)-34(k). Since the sound pressure and the phase or the like of an output acoustic signal are adjusted to realize an excellent acoustic signal correction device. |
