Echoscan
VISUAL VIBRATIONS (For IBM & MAC) CAT.# 000-K01-00

  This is a series of 5 programs that solve vibration problems with graphical
  display of time and frequency response :

   * FREE-free vibration of a single degree of freedom oscillator , with
     specified initial conditions.
   * STEP-same as FREE but with step force input.
   * FREQ-frequency response of an underdamped oscillator.
   * ISO-frequency response of a forced two mass system.
   * PULSE-impulse response of a single degree of freedom system. A technique
     is presented so the impulse response can be used to get the response to
     any forcing function.

  Disk contains source code in BASIC
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