%T An application of ultrasonic signal processing in a mixed system of transputers and digital signal processors %A Alastair R. Allen, Dalan Wang %E Stephen J. Turner %B OUG\-12: Tools and Techniques for Transputer Applications %X A system is described in which a floating\-point digital signal processor is incorporated into a transputer array. The resulting combination provides a significant resource which is being used to process ultrasonic echoes to determine surface roughness.