Stress Recovery Effects of High- and Low-Frequency Amplified Music on Heart Rate Variability

Figure 1

Experimental procedure. One of three musical stimuli (OM, HFM, and LFM) was selected in a counterbalanced random order. The participants were asked to complete the semantic differential questionnaire after listening to each piece of music. HFM: music with an amplified high-frequency component; LFM: music with an amplified low-frequency component; OM: original music.