The power brake booster may be going bad.
when you breath is air and force it out with your tongue it makes the hissing noise
By the hissing noise it sounds like you need a new brake booster
Madagascan hissing cockroaches make a noise by forcing air out of a special hole.
Vacuum hose leaking.
The wet brakes noise you are hearing from your car could be caused by water or moisture on the brake pads or rotors. When water comes into contact with the hot brakes, it can create a sizzling or hissing sound. This is usually temporary and should go away as the brakes dry out. If the noise persists, it could indicate a more serious issue with the brakes that should be inspected by a mechanic.
turbo
You might want to see a specialist. I've never heard of that.
When a ferret makes a hissing noise it usually means they are irritated or mad
change brakes or check drums
Engine. Horn. Muffler. Stereo. Brakes.
making a hissing noise
Is there a grinding sound too? You may need new breaks. Take them to someone who knows about this stuff before they fail.