Abstract Prediction of the impact sound insulation of wooden floors requires information of the excitation forces driving the structure. According to earlier research, it is evident, that the impact force generated by the ISO tapping machine on the wooden floors is different than on bare concrete floors. However, only a few measurement results of the force have been shown in the literature. The purpose of our study was to experimentally determine the impact force excitation with an instrumented ISO tapping machine on a large range of wooden floors. One of the hammers of the tapping machine was equipped with both force and acceleration sensors. The hammer itself was modified to fulfil the requirements for the tapping machine presented in the standards ISO 10140-5 and ISO 16283-2. Based on the measured force signals, force spectra and impulses exerted by the instrumented hammer were determined. According to the results, differences between the force spectra on the wooden floors were prominent in the frequencies above 500 Hz. In the low-frequency range, the variation of the driving force corresponded to a level difference of more than 3 dB. In addition, the results showed that the process of excitation was not transient for the structures studied. Thus, the vibration of the measured wooden floors did not seem to influence the impact force. The findings of this paper are of very high importance for those developing mathematical calculation tools to predict the impact sound insulation of wooden floors.

中文翻译：

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ISO攻丝机在木地板上产生的冲击力激发

摘要 木地板冲击隔音的预测需要驱动结构的激励力信息。根据早期的研究，很明显，ISO攻丝机在木地板上产生的冲击力与裸露的混凝土地板不同。然而，文献中只显示了少数力的测量结果。我们研究的目的是用仪器化的 ISO 攻丝机在大范围的木地板上通过实验确定冲击力激发。攻丝机的其中一个锤子配备了力和加速度传感器。锤子本身经过修改以满足 ISO 10140-5 和 ISO 16283-2 标准中对攻丝机的要求。根据测得的力信号，测定了仪器锤施加的力谱和脉冲。根据结果​​，木地板上的力谱差异在 500 Hz 以上的频率上比较突出。在低频范围内，驱动力的变化对应于超过 3 dB 的电平差。此外，结果表明，所研究的结构的激发过程不是瞬态的。因此，实测木地板的振动似乎不会影响冲击力。本文的发现对于那些开发数学计算工具来预测木地板冲击隔音效果的人来说非常重要。在 500 Hz 以上的频率中，木地板上的力谱之间的差异很明显。在低频范围内，驱动力的变化对应于超过 3 dB 的电平差。此外，结果表明，所研究的结构的激发过程不是瞬态的。因此，实测木地板的振动似乎不会影响冲击力。本文的发现对于那些开发数学计算工具来预测木地板冲击隔音效果的人来说非常重要。在 500 Hz 以上的频率中，木地板上的力谱之间的差异很明显。在低频范围内，驱动力的变化对应于超过 3 dB 的电平差。此外，结果表明，所研究的结构的激发过程不是瞬态的。因此，实测木地板的振动似乎不会影响冲击力。本文的发现对于那些开发数学计算工具来预测木地板冲击隔音效果的人来说非常重要。实测木地板的振动似乎不会影响冲击力。本文的发现对于那些开发数学计算工具来预测木地板冲击隔音效果的人来说非常重要。实测木地板的振动似乎不会影响冲击力。本文的发现对于那些开发数学计算工具来预测木地板冲击隔音效果的人来说非常重要。