Use 'out loud' when you want to share your thoughts with those around you. He thought the idea was silly, but didn't say it out loud.
Pro Tip 2/3
Group Involvement
'Out loud' often indicates reading or speaking so a group can participate or listen. During the meeting, we took turns reading our suggestions out loud.
Pro Tip 3/3
Attention Cue
Saying something 'out loud' can signal that what you're about to say is important. Let me read these instructions out loud so everyone understands.