The long A sound

The long A sound.
A sound, a as in ape.
The ape is eating a banana.
A as in apron.
Mom is wearing an apron.
Look at this word: acorn
The letter a in acorn makes the long a sound.
How to make the sound?
Open your mouth with lip spread out, keep your tongue in the middle of your mouth to make the a sound as in ate. Try again, this time put your hand on your throat, it's moved or vibrated?
Let's look at some more words that begin with the letter A and make the a sound as in ate.