Background: Auditory sense is an important guarantee for the elderly to communicate with the outside world. Hearing comfort is of great significance to the construction of mental health and the improvement to life quality of the elderly. However, researchers have paid less attention to studies on the auditory comfort of the elderly in space design. Objective: This study was con-ducted to investigate the correlation between auditory comfort and spatial scale in "TV watching" behavior of elderly people. Methods: By recording the daytime behavior of 60 elderly people in a nursing home in Tieling city, it was determined that the main auditory behavior other than con-versation was "watching TV" behavior. This experiment first graded the hearing level of the elder-ly, and then collected the evaluation of the auditory comfort of "watching TV" behavior on differ-ent spatial scales by means of subjective evaluation and scoring Level 5. Data were analyzed in SPSS using Pearson correlation coefficients analysis. In the end, using the Ergo-LAB, the tech-nical platform recorded the elderly physiological signals (skin electrical signals and pulse signals). Combining the qualitative analysis of subjective evaluation, ErgoLAB software was used to ana-lyse the relationship between physiological signal and spatial scale quantitatively. Results: There was a strong negative correlation between auditory comfort and spatial scale in "TV watching" behavior in the hearing impaired elderly (P
