Recently, inter-floor noise generated mainly in apartment complexes has emerged as a major factor in deteriorating the quality of life of residents and is recognized as a serious problem that causes social conflict. Accordingly, the government is taking various policy responses such as strengthening standards, revising building design standards, and preparing a follow-up management system, and the construction and material industries are also seeking technical solutions. This study collected patent data from IP5 countries such as Korea, the United States, Japan, Europe, and China from 2004 to 2024 and conducted a quantitative trend analysis based on this in order to understand the technological development trend of inter-floor noise reduction technology and suggest future research and development directions. As a result of the analysis, it was confirmed that the technology is gradually expanding from the center of floor structures to ceiling and wall structures, sound absorption and sound-absorbing and sound-proof material technology, and in particular, it is confirmed that Korea and China are leading related technologies. Recently, artificial intelligence and data-based optimal design, and user-customized noise reduction technology along with the use of eco-friendly and nano materials have attracted attention. Although this study has limitations in patent-based analysis, it provides significant implications as basic data for establishing future R&D strategies by looking at the trend of technological development and deriving blank technologies and predicting promising future technologies.