Voiceless alveolar non-sibilant fricative

Have you ever pretended to be a snake and hissed? Well, this is kinda like that, but instead of using your tongue to make a hissing sound, you use your teeth and the roof of your mouth. When you do this, you make a sound that is called a voiceless alveolar non-sibilant fricative. It's a fancy way of saying a sound made by blowing air through a tiny space between your teeth and the roof of your mouth, without using your voice or making a hissing sound. It's a sound that is used in some languages, like Spanish and Italian, to make certain words. And people who study linguistics, which is the science of language, use this term to describe this kind of sound.