The Acoustical Performance of Foamed Material in Reducing Impact Noise and Vibration through Upper Floors during Temperature Rise
Main Article Content
Abstract
This study aims to express the acoustic performance of the foaming material (polyurethane) as a function of temperature. The aim is to investigate the role of the foam in damping the impact of vibration on the upper floor in a building that occurs in conjunction with the increase in the temperature of an enclosed space. A range of temperatures in a hot arid region is suggested to be 25- 75 °C for an enclosed space. The study analyses the main effective parameters that are involved in determining the noise reduction, such as stiffness and resonance frequency. It has been noticed that there is a significant decrease in the value of the material’s stiffness. A decrease of up to 25% at 75 ◦C can be reached compared to that at room temperature. The decrease in stiffness decreases the corresponding value of the resonance frequency up to10%. Therefore, the value of noise reduction increases. This increase can reach 3 dB or 7% at a frequency of 500 Hz.
Downloads
Article Details
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Journal author rights
In order for Romanian Journal of Acoustics and Vibration to publish and disseminate research articles, we need publishing rights. This is determined by a publishing agreement between the author and Romanian Journal of Acoustics and Vibration. This agreement deals with the transfer or license of the copyright to Romanian Journal of Acoustics and Vibration and authors retain significant rights to use and share their own published articles. Romanian Journal of Acoustics and Vibration supports the need for authors to share, disseminate and maximize the impact of their research and these rights, in Romanian Journal of Acoustics and Vibration proprietary are defined below:
For subscription articles:
Authors transfer copyright to the publisher as part of a journal publishing agreement, but have the right to: Share their article for personal use (manuscript version); retain patent, trademark and other intellectual property rights (including research data); proper attribution and credit for the published work.
For open access articles:
Authors sign an exclusive license agreement, where authors have copyright but license exclusive rights in their article to the publisher. In this case authors have the right to: share their article in the same ways permitted to third parties under the relevant user license; retain patent, trademark and other intellectual property rights (including research data); proper attribution and credit for the published work.
Rights granted to Romanian Journal of Acoustics and Vibration
For both subscription and open access articles, published in proprietary titles, Romanian Journal of Acoustics and Vibration is granted the following rights:
- The exclusive right to publish and distribute an article, and to grant rights to others, including for commercial purposes;
- For open access articles, Romanian Journal of Acoustics and Vibration will apply the relevant third party user licence (Open access licencses) where Romanian Journal of Acoustics and Vibration publishes the article on its online platforms;
- The right to provide the article in all forms and media so the article can be used on the latest technology even after publication;
- The authority to enforce the rights in the article, on behalf of an author, against third parties, for example in the case of plagiarism or copyright infringement.