Can you all hear?
Can you hear all right/cearly/properly/OK?
Can you hear at the back/in the corner?
Am I speaking loud enough?
If you can't hear, come a bit nearer/closer.
Come and sit at the front if you can't hear.
I'll speak a bit louder.
I'll speak up (a bit).
I'll try and speak more clearly/slowly.
Tharinee 046 3EN