DIGITALLY SHAPED NOISE GENERATING SYSTEM

摘要

DIGITALLY SHAPED NOISE GENERATING SYSTEM This invention relates to high-speed acoustic noise generating system that is under the control of a computer in order to produce spectrally shaped noise of any desired amplitude versus frequency shape. The foregoing is accomplished by randomly generating and serially storing binary noise in a first memory, by generating with a computer, filter coefficients and serially storing the filter coefficients in a second memory, and by individually adding and accumulating the filter coefficients generated by the computer when the serially corresponding noise coefficient has the same polar-ity as the logic that triggers the apparatus of this invention.