## 2 Materials and Methods
### Vibrational Comfort Methodology  
The RMS (root mean square) method is a physical interpretation as vibration energy. The mean square value describes vibrations effectively because it includes information about the RMS values of the vibration components across the entire range of considered frequencies. An illustration of the mean square value of harmonic and random vibrations is shown in Figure 7[29]. The criteria used for evaluating human exposure to vibration in buildings depend on the evaluation method. There are four main methods, each considering different parameters, as follows:  
* Acceleration (velocity) of vibration corrected across the whole frequency range. * Spectrum (frequency structure) of the effective value (RMS) of acceleration (velocity) of vibration in 1/3 octave band. * Vibration dose value (VDV). * Maximum transient vibration value (MTVV). In this paper, the most popular method, RMS, is used, but with a modification to the so-called HPVR (human perception of vibration factor). This factor was first introduced in the 2017 Polish standard [30]. It is a very useful ratio that indicates how many times the threshold of human perception of vibration is exceeded. \[\text{HPVR}=\left(\frac{\text{a}_{\text{RMS}}}{\text{a}_{\text{w}}}\right) \tag{2}\]  
where  
\(\text{a}_{\text{RMS}}\)--acceleration RMS value obtained from the analysis;  
\(\text{a}_{\text{w}}\)--acceleration RMS value equivalent to the threshold for the perception of vibration in in the same 1/3 octave band as in aRMS. Figure 7: Duration time definition. The basic criteria for determining floor vibrations are measured and, after analysis, the obtained values are compared with the standard values described in [29], which pertain to the evaluation of the impact of vibrations on people in buildings, as outlined in the Polish Standard (2017, in Polish). It should be noted that this criterion is more sensitive than the one related to the impact of vibrations on the building structure [15], because the comfort thresholds for people inside the building are exceeded long before vibrations significantly affect the building's structure. For comparison purposes, the Polish Standard [30] introduced the HPVR (Human Vibration Perceptivity Ratio), which measures human sensitivity to vibrations. It is the ratio of the maximum RMS value obtained from the analysis (RMS max) to the vibration sensibility threshold (regardless of the direction) in the same frequency band. The value of the HPVR ratio is provided, together with the information on the central frequency of the 1/3 octave band in which the HPVR is determined. WODL indicates directly how many times the threshold of perception of vibrations by people has been exceeded. Some studies in ISO [17] and other national standards show that there are no clear and detailed guidelines about how to make experimental tests in the case of the influence of vibrations on people inside buildings. Thermal comfort is, as shown by surveys, one of the most important comfort sensations. The method for determining thermal comfort parameters is contained in ISO 7730 [31] (ergonomics of the thermal environment--Analytical determination and interpretation of thermal comfort using calculation of the PMV and PPD indices and local thermal comfort criteria). The international standard for the assessment of thermally moderate environments was prepared in parallel with standard 55 developed by ASHRE. Human thermal sensations are mainly related to the heat balance of the body as a whole. The methodology developed by the authors assumes that the main factor felt by humans is the ambient temperature. According to the methodology, the sensor for measuring temperature met the stringent requirements according to ISO 7726 (ergonomics of the thermal environment--instruments for measuring physical quantities) [24].