'Voice' is a mode that enables a user to speak in a channel that is set mode +m (moderated). When a channel is +m it means that only voiced and opped users can speak. Voiced users have a + next to their nicknames, opped users have an @ next to their nicknames.
The only ones who can voice you are the channel ops (@), so you'll need to ask one of them for voice. Check the channel topic first to see if there are any rules as to who gets voiced or how to request it. Type /topic #channel-name to see the topic.
G'luck!
Regards,
