This is the 8899th most frequent Russian word.
прозвучало
"Прозвучало" means "sounded" or "was heard."
In this sentence, 'прозвучало' means that the questions were voiced or mentioned audibly, implying they were shared for consideration.
На собрании прозвучало много вопросов.
At the meeting, many questions were raised.
Here, 'прозвучало' reflects that the emotion of regret was communicated during the speech.
В его выступлении прозвучало сожаление.
In his speech, regret was expressed.
In this context, 'прозвучало' refers to the warning being audibly announced or stated.