# Impact of Sound and Image Features in ASMR on Emotional and Physiological Responses
## 5 Conclusions  
This study sought to elucidate how specific sound and image features of ASMR videos elicit distinct emotional responses, focusing on high valence-low relaxation (HVLR) and low valence-high relaxation (LVHR) states. By integrating physiological measures such as EEG and HRV with subjective evaluations, we aimed to provide concrete evidence of how different ASMR stimuli influence emotional arousal and relaxation levels. The findings clearly demonstrate that ASMR content can be strategically designed to evoke targeted emotional states based on its sensory properties. Our results confirmed that LVHR ASMR videos, characterized by lower-frequency sounds and darker, more muted colors, significantly increase delta wave activity in the frontal lobe and enhance parasympathetic nervous system activity, as indicated by heightened HRV. These physiological markers are consistent with greater relaxation and emotional calm. In contrast, HVLR ASMR videos, featuring mid- to high-frequency sounds and visually brighter elements, were associated with increased beta wave activity in the frontal lobe and a more modest improvement in HRV, indicating heightened cognitive engagement and positive arousal. The subjective reports of positivity and relaxation also aligned with participants' physiological responses. Additionally, the emotional vocabulary selected reflected these patterns, with the LVHR group choosing words linked to calmness and tranquility, while the HVLR group opted for words associated with brightness and energy. These results demonstrate a strong correlation between physiological responses and subjective evaluations, offering scientific support for the emotional effects of ASMR. The analysis of the ASMR videos' physical characteristics demonstrated a high level of accuracy in distinguishing between LVHR and HVLR emotional states. For instance, videos with louder sounds in the 50 to 500 Hz range, lower brightness levels of 20 to 30%, and a higher ratio of green to blue were more likely to evoke LVHR responses. In contrast, videos with louder sounds in the 500 to 10,000 Hz range, brightness levels of 60 to 70%, and a higher ratio of yellow to green were more likely to elicit HVLR responses. This finding underscores the potential for ASMR content to be systematically designed to evoke specific emotional responses. It provides evidence-based guidelines for both researchers and content creators. However, several limitations should be noted. The study involved 31 participants, all healthy adults from a specific age group. This relatively small sample size may limit the generalizability of the findings. Additionally, the study focused exclusively on a subset of ASMR videos, specifically those categorized as high valence-low relaxation (HVLR) and low valence-high relaxation (LVHR), excluding a broader range of ASMR content that may elicit different emotional or physiological responses. Furthermore, the experiment was conducted in a controlled laboratory environment, which may not fully reflect the real-world settings in which ASMR is typically experienced. ASMR is often consumed in relaxed, personal environments, such as before sleep, where physiological and emotional responses may differ. Additionally, individual differences in disposition and preference may affect ASMR's impact. While this study analyzed ASMR content characteristics using statistical techniques, future research could explore optimal content properties tailored to individual differences through methods such as machine learning. In conclusion, this research provides foundational insights into how ASMR content can be designed to elicit specific emotional responses based on its sound and image characteristics. The findings not only enhance the effectiveness and appeal of ASMR videos but also have practical implications for their use in therapeutic settings and experimental design. Thoughtfully crafted ASMR content can serve as a valuable tool for promoting emotional relaxation and well-being.