Objectives: Individuals with hearing loss complain of perceiving the emotions conveyed in music. While many studies have examined this issue, the cortical mechanisms involved remain unclear. This study aims to investigate how audibility affects cortical activity during the emotional perception of music. Methods: Musical stimuli expressing happiness, sadness, and neutrality were filtered at 1kHz to simulate low-frequency (LFsim) or high-frequency (HFsim) hearing loss. Forty-eight healthy participants were randomly assigned to three groups: HFsim group, LFsim group, and normal hearing (NH) group. During 64-channel EEG recording, participants listened to these stimuli, followed by rating arousal and valence (dimensional model) and selecting emotions (discrete model). Each of the 15 stimuli was presented 20 times, resulting in a total of 300 trials. Results: The HFsim group exhibited significantly increased alpha power during the perception of all three emotions, particularly in the sad condition. Trials were selected based on normalized ratings of arousal and valence (high or positive >= 0.3, low or negative < -0.3, middle -0.3<= and < 0.3). In the sad condition, alpha power showed prolonged periods of significant differences among groups, especially in arousal while valence ratings displayed minimal variability. Alpha changes were more pronounced in the sad condition and more evident in arousal than in valence. Conclusions: These results suggest that the lack of high-frequency auditory information might require increased cognitive load during emotional perception. Additionally, audible spectral information, especially high-frequency audibility, significantly affects alpha activity during the perception of musical emotions.