˵

1. ܱĵԪȡƷQ0 = 0.3 ~ 0.7 ĺá
2. ˵
   һQ0         ԪƷ
   ڶFa/F0      1.2 ~ 2 ֮
   V0         ԪЧݻ
   ĸF0         ԪгƵ
              Ҫļ·Ὣ
                      ں͸ͬĿ¼¡
                      
                      
3. 
   Ʒ:     ֵһӦΪ 0.5 ~ 1 
                     0.5 ~ 0.7 ʱ ˲̬Ӧ
                     0.7 ~ 1   ʱ к
                     
                     ֵСڶFa/F0ʱֵ
                     ֵڶFa/F0ʱСֵ
                     