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shrillness(noun) the quality of being sharp or harsh to the senses. the shrillness of her hair color. shrillness, stridence, stridency(noun) having the timbre of a loud high-pitched sound.
Hoarseness is a term that describes abnormal voice changes. When hoarse, the voice may sound breathy, raspy, strained, or there may be changes in loudness or pitch (how high or low the voice is). The changes in sound are usually due to disorders related to the vocal cords that are the sound producing parts of the voice box (larynx). While breathing, the vocal cords remain apart.