Drink less ice water and avoid alcohol and coffee. Keeping the water balance in the body can fully moisturize the vocal cords. Don't use your voice too much, don't scream, and don't talk loudly in noisy places. If you feel a dry throat or hoarseness, stop talking. The sound should be kept normal, neither too high nor too low, and whispering is not conducive to the protection of sound.
If you want to make your voice better, you can slow down when you speak, emphasize some main words, and speed up the change slightly in general content.
With the change of content and mood, the volume and tone of speech will also change, in different voice segments. To have an orgasm, to be relaxed, to be happy, to be sad, can be fascinating and exciting.