抄録
In this paper, the measurement method of the relation to the quality housing securing law was examined. First, impedance of impact time was examined by impulse hammer and bang machine. The result of bang machine was compared with that of the impulse hammer. The result of the impulse hammer corresponded to the calculation value. Impedance in impact time by a bang machine differs about 2-4dB against the calculation value. It was shown that the natural frequency influenced the impedance of the impact time.
