Abstract
The objective of this paper is how to control waveforms by means of all pass functions. Causal time functions such as earthquake records are factorized into minimum phase shift (MPS) and all pass (AP) functions, which is called factorization. This concept is applied to impulse response of SDOF to investigate effects of AP phases when they are parametrically changed. With linear AP phase shifts, waveforms of the response are unchanged but the time delays appear. With nonlinear AP phase shifts, waveforms of the response show irregular attenuation, and their maximum amplitudes are smaller than the original ones.
