Author(s): Jeong Jeongho, Kim Yonghee, Ryu Jongkwan, Kim Kyoungho
Low frequency impact sound is one of the major noise sources in dwellings. In order to measure low frequency impact sound, heavy/soft impact source; rubber ball, was standardized in ISO 10140 series and ISO 16283-2. Previous studies reported that rubber ball has similar physical and subjective characteristics with real floor impact sound such as children’s running and jumping. Also, as a single number quantities, LA,Fmax and arithmetic average from 63 Hz to 500 Hz octave bands were proposed. In this study, subjective evaluation on the satisfaction were conducted to propose classification criteria of heavy/soft impact sound. More than 130 people who live in multi-story residential buildings participated and multi-channel loud speakers and subwoofers were used to represent heavy/soft impact sounds which were recorded in various multi-story residential buildings. Subjective evaluation results was analyzed considering classification scheme standardized in ISO/DIS 19488.
Name: Dr JeongHo Jeong