Abstract
In Korea, there is a trot song among traditional music that mainly focuses on delivering words by voice. Most famous trot singers sing popular songs, and their popularity has lasted for decades. However, compared to song voices in their 30s and 40s, the aging voice feels dull. The song voice of an old-fashioned trot singer is hard to feel the singing of his prime due to the aging characteristics. As we get older, the spectrum bandwidth of song voices decreases. Reducing spectrum bandwidth in vocalization simplifies voices, making it difficult for listeners to fall into the song. In this paper, the characteristics of the differences were identified by comparing and analyzing the famous voice of the famous trot singer's heyday and the current voice spectrum. The voices of famous trot singers, who have been popular for more than 30 years, have been shown to have a low frequency bandwidth of −1% a year reduced, and simplified by a decrease of approximately −27% for 30 years. In conclusion, as you get older, you need to try to recover the harmonics by varying the size of the mouth.
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