Hissing will sound just like a hiss, usually with the mouth wide open and fangs showing. It's defensive as much as offensive, usually a warning to leave the cat alone. Some theorize it's supposed to imitate a snake.
A hissing and growling cat. Note the mouth position and ears.
Growling and Hissing Cat
Purring is a gentle rumble. Research has shown that petting a purring cat actually lowers human blood pressure!
Here's a cat purring.
Purring Cat
Note that purrs vary among cats. Some are so loud, they shake the walls. Others are so gentle, you can only feel it by putting your hand on the cat's throat.
But cats have many other vocalizations, from a loud meow, to trills, brrrts, chirps, chatters, etc. They all mean something; just what, we may never know.
A hissing and growling cat. Note the mouth position and ears.
Growling and Hissing Cat
Purring is a gentle rumble. Research has shown that petting a purring cat actually lowers human blood pressure!
Here's a cat purring.
Purring Cat
Note that purrs vary among cats. Some are so loud, they shake the walls. Others are so gentle, you can only feel it by putting your hand on the cat's throat.
But cats have many other vocalizations, from a loud meow, to trills, brrrts, chirps, chatters, etc. They all mean something; just what, we may never know.