Test and Analysis of the Sound Insulation Performance of Four Types of Timber Structure Floors under Jumping Excitation

Abstract

To improve the impact sound insulation performance of building floors and meet the objective requirements for living comfort of residents, in this article, three kinds of elastic cushion materials, Portuguese cork board, BGL insulation sound insulation foam board, and EPP polypropylene plastic foam board, are applied to the sound insulation of a light frame wood floor structure of the same bedroom and compared to the ordinary floor. This study uses the transfer function method and transient excitation method to measure the sound insulation, damping ratio, and elastic modulus of materials, as well as the sound insulation of the floor under the jumping excitation method of daily behavior. Through comparative analysis, the results and factors of improving the sound insulation performance of the floor are obtained, according to which three types of elastic cushion materials and the floor covering composed of them have higher vibration and noise reduction performance. Among them, the overall sound insulation performance of BGL board floor is the highest, followed by EPP board and cork board floor, and ordinary OSB floor is the lowest. Under the jumping excitation method, three floating floors can improve the impact sound insulation performance of the middle and low-frequency bands.