Peer Review (Joung Chan Kwon)

As we conducted our research on mouth cavity acoustics, we found that most of the vowel information is contained in the first three formants--possibly the reason for spectrograms of vowel charts only displaying three. The fourth and fifth formants are moreso used for determining who (rather, the sort of voice) is producing the sound. Also, although the formants technically change with the production of vowels, the important factor is the ratio between the formants. If I remember correctly, the first formant will change based on the pitch. You elaborate later in the article but I think such should be clearer earlier. Also, I hope to see some pictures and fewer placeholders, but I assume that is in the works.

Also, I think the singer's formant is a fascinating topic that is likely to fall into your topic of opera singing.