Dic: vocal (one of its meanings as an adjective)

• He has been very vocal in his displeasure over the results.
• A public inquiry earlier this year produced vocal opposition from residents.
• a vocal minority with racist views.
• a vocal critic of city politics.

1. ADJ | You say that people are vocal when they speak forcefully about something that they feel strongly about.
2. expressing one's opinions clearly and open.
3. Tending to express oneself often or freely; outspoken.

.... Cobuild, Collins Essential, The American Heritage

cf. Full of voices; resounding:

• a playground vocal with the shouts and laughter of children.