In many languages there are words or sounds that function as attention-seeker.
For example you might say hey yo,
And this causes people to turn their heads towards you.
In Persian there is آهای as another example.
Please note that my question is not about interjections, as they are part of a conversation which is after attention is given.
My question is about when other people are doing their things and minding their own business and suddenly someone comes and shouts like "hey everyone" to turn their heads. Similar to shouting.
Is there a technical linguistic term for this?