"未闻其声,先见其人"
seeing the person before hearing his/her voice.
or,
to see the person before hearing his/her voice.
Usually it is "未见其人先闻其声"
hearing his/her voice before seeing the person.
or,
to hear his/her voice before seeing the person.
Has not heard its, foresight its person
也可译成see sb before hear him(her)
Sound comes earlier than the appearance.
Has not heard its, foresight its person
Sounds of smiling came long before her appearance.