## 4 Results and Discussion
### Results of Grouping for Auditory Evaluation Factors
As a result of the secondary expert interviews, the definition of auditory presence in a metaverse environment is shown in Table 8, the considerations for creating an evaluation questionnaire for auditory experiences with presence are shown in Table 9, and the terminology for the evaluation questionnaire is shown in Table 10. \begin{table}
\begin{tabular}{c c c} \hline \hline
**Interview Question** & **Participants** & **Expert Answers** \\ \hline \multirow{5}{*}{P4} & Auditory stimuli that make you feel ’real in space, time, and emotion in a virtual space’. \\ \cline{2-3}  & P5 & Make it feel like a real-world auditory experience. \\ \cline{2-3}  & P6 & Auditory stimuli in the virtual world that reflect the sounds or emotionally evocative elements that listeners expect in the real world. \\ \cline{2-3}  & P7 & To make a virtual environment sound and feel like it is real. \\ \cline{2-3}  & P8 & The emotional and socially relevant auditory experience of everyday life is embodied in a virtual world. \\ \hline \hline \end{tabular}
\end{table} 
Table 8: Questions and expert responses to the definition of auditory presence. Based on the secondary expert interviews shown in Table 8, it was confirmed that the experts' opinions on the question 'How can you define auditory presence in a metaverse environment?' were generally described as relating to the auditory sensation of 'being there', i.e., the transfer of sounds from the physical world to a virtual space, which is consistent with the theories advocated in the literature review [20; 21], and these were considered when creating the presence evaluation questionnaire. As shown in Table 9, it was confirmed that the auditory presence and AUX factors are subject to subjective interpretation and should be accompanied by examples, and that the examples should be described in as intuitive and everyday terms as possible, rather than in technical terms. \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{**Interview Question**} & \multirow{2}{*}{**Auditory Evaluation Factors**} & \multicolumn{5}{c}{**Expert Answers**} \\ \cline{3-8}  & & **P4** & **P5** & **P6** & **P7** & **P8** \\ \hline Implementing the spatial properties of sound & \multirow{2}{*}{Location} & Sound environment & Sense of space & Spatial awareness & Realism \\ \cline{2-8} Three-dimensional perception of sound & & \multirow{2}{*}{Distance} & Object location & Distance & Location & Source \\ \cline{2-8} Quality of the sound source & & & & & & \\ \cline{2-8} Clarity of sound & & & & & & \\ \cline{2-8} \cline{2-8} Focusing the metaverse environment with sound & & & & & & \\ \cline{2-8} \cline{2-8} \multirow{4}{*}{Please create terminology for the public to understand auditory presence and AUX metrics in a metaverse environment} & & & & & & \\ \cline{2-8} \cline{2-8}  & Sounds that match visual motion timing & & & & & \\ \cline{2-8} \cline{2-8}  & Sound experiences that live up to visual expectations & & & & & \\ \cline{2-8} \cline{2-8} Non-looping auditory experiences & & & & & & \\ \cline{2-8} Experiences & Naturalness & & & & & \\ \cline{2-8} Complement & & & & & & \\ \cline{2-8} Complement & & & & & & \\ \hline Implementing realistic soundscapes in a metaverse environment & & & & & & \\ \cline{2-8} \cline{2-8} Auditory cues to help you navigate & & & & & & \\ \cline{2-8} \cline{2-8} Situational awareness & & & & & & \\ \hline \hline \end{tabular}
\end{table} 
Table 10: Questions and expert responses for deriving questionnaire terms from auditory evaluating factors that consider the public understanding of presence.