Investigating Heart Rate Responses to Different Speaking Behaviours under Different Thermal Sensations

This study examines the effects of different speaking behaviors—Silent, Speech, and Conversation—on heart rate (HR) under varying thermal sensation (TS) levels. The research investigates how HR responds to the interaction of behaviors and thermal conditions, using statistical analyses and polynomial regression to identify trends and patterns. The results show distinct HR responses across the three behaviors, with Silent exhibiting the most stable and consistent patterns, Speech showing the highest variability, and Conversation displaying intermediate responses. These findings highlight the dynamic interplay between speaking behaviors and thermal environments, demonstrating that behaviors like Speech and Conversation can influence physiological responses differently depending on thermal conditions. This study underscores the importance of distinguishing between speaking behaviors when analyzing physiological responses in thermal environments. By identifying behavior-specific patterns, the research provides valuable insights for fields such as thermal comfort, environmental ergonomics, and human physiology.