his study investigates the effects of spectator noise on umpire stress levels during major badmintontournaments. Previous research has shown that spectator noise can affect performance and decision-making insports, including badminton. However, there is limited understanding of how this phenomenon explicitly affectsumpires, who play a crucial role in officiating matches. Nine experienced umpires from the 24th Badminton WorldFederation (BWF) World Championships participated in the study. Heart rate variability (HRV) was used to measurestress levels objectively. In addition, subjective noise sensitivity and general stress levels were assessed usingvalidated questionnaires. Noise levels were recorded on court using stationary sound level meters, and individualnoise exposure was measured using personal carried noise dosimeters. The results showed a statistically significantcorrelation between spectator noise level and stress, mainly when umpires were working as service judge. Umpireswith a higher subjective sensitivity to noise and higher general stress levels showed a stronger correlation betweennoise levels and stress during matches. The findings suggest that spectator noise may be a factor to consider inefforts to support umpire performance and well-being in stressful environments. Further research is needed toinvestigate the potential impact of this association on decision-making processes.