@article {Hirakawa:2016:0736-2935:682,
title = "Impact sound insulation: Transient power input from the rubber ball on locally reacting mass spring systems",
journal = "INTER-NOISE and NOISE-CON Congress and Conference Proceedings",
parent_itemid = "infobike://ince/incecp",
publishercode ="ince",
year = "2016",
volume = "253",
number = "8",
publication date ="2016-08-21T00:00:00",
pages = "682-691",
itemtype = "ARTICLE",
issn = "0736-2935",
url = "https://ince.publisher.ingentaconnect.com/content/ince/incecp/2016/00000253/00000008/art00077",
author = "Hirakawa, Susumu and Lee, Pyoung Jik",
abstract = "For heavy impacts in buildings, impact sound insulation is measured using the rubber ball in terms of the fast time-weighted sound pressure level, $\textit{L}_p_,_F_m_a_x$. With knowledge of the transient power input from the rubber ball, $\textit{L}_p_,_F_m_a_x$
can be predicted using Transient Statistical Energy Analysis. For the rubber ball falling onto a concrete floor, this transient power can be calculated from the measured blocked force. However, this is not possible when there is a floating floor. As this is the practical situation, this paper
concerns experimental work to investigate idealised floating floors using a force plate. This was a steel plate on different resilient materials to represent a locally-reacting mass-spring system. Results show two characteristic force time pulses from mass-spring systems, a single and double
peak for low and high stiffness springs respectively. These measurements were then processed to calculate the transient power input from each mass-spring system, and $\textit{L}_p_,_F_m_a_x$ measurements were taken in a room below a concrete floor with
and without these systems. In terms of the difference with and without the mass-spring system a clear relationship has been found between the measured transient power input and the difference in the measured $\textit{L}_p_,_F_m_a_x$ for high stiffness
springs.",
}