Pretty sure it's caused by the foreskin or the shape of the urethra.
They make like a hissing sound, sometimes a chirping one too.
A ferret that make a hissing sound means they are annoyed or irritated
To make a humming or hissing sound, like an arrow or ball flying through the air; to fly or move swiftly with a sharp hissing or whistling sound., A hissing and humming sound.
Geese make a hissing sound.
it makes hissing vocalizations
Sometimes it makes an echo or reverberation.
Snakes are reputed to make a hissing sound.
1. to make a humming, buzzing, or hissing sound, as an an object passing swiftly through the air 2. to move or rush with such a sound 3. a person who is quite good at a particular activity, in a certain field, etc. 4. in slang terms, to urinate
Could be a "hissing" sound
they make a hissing sound
A hissing noise
the air is depleting from your lungs