guǎng / chǎng / shàng / de / rén / shēng / hé / jī / qì / shēng / hùn / zài / yì / qǐ / xíng / chéng / yí / piàn / zá / zào

广场上的人声和机器声混在一起，形成一片杂噪。

The sounds of people and machines blended into a din in the square.