Detection Accuracy on Hammering Test for Tile Facing

Abstract

This research made tile facing test specimens with 2 kinds of delaminations. Hammering Test was performed and the judgment value of the inspector was expressed in standard-ized acoustic sound pressure. 1) in case of the range beyond 10, standard which accumulated-ized sound pressure level in decibel can judge the difference in the sound easily. 2) the judgment value by which the difference in the sound can be told by person's ear can think standard which accumulated-ized sound pressure level in decibel will be nearly 1