孩子在外面大声唱歌，听起来很开心。

Háizi zài wàimiàn dàshēng chànggē, tīngqilai hěn kāixīn.

The children are singing loudly outside, it sounds very happy.

音乐太大声了，我听不清你说什么。

Yīnyuè tài dàshēng le, wǒ tīng bù qīng nǐ shuō shénme.

The music is too loud, I can't hear clearly what you are saying.

他大声地笑了起来。

Tā dàshēng de xiào le qǐlái.

He started to laugh loudly.