zhè / wèi / yǎn / yuán / yòng / xiǎo / sǎng / yǎn / chàng / shēng / yīn / xiǎn / de / gé / wài / qīng / liàng

这位演员用小嗓演唱，声音显得格外清亮。

The performer sang in falsetto, making the voice sound especially clear.