The reason cats have particularly high voices is because when they make sounds, there is a structure called a "tone gate" in their throats, which contracts or stretches to adjust the pitch of the sound. When a cat makes a high-pitched sound, it will pull the sound gate very long, so that the sound will become particularly high.
In addition, cats also have a sound called "meowing". When they meow, they will contract their throats hard to make the sound become Extremely sharp. This sound is usually made when a cat is frightened or feels in danger. A cat's voice may also be affected by genetics, age, size, and health. Some cats have higher voices due to physiological reasons, while some cats have deeper or abnormal voices due to health problems. If your cat is making unusual noises, it is recommended that you take her to the vet.