Correct

咣

/ guāng / 
Strokes

Definition

(onom.) bang/door banging shut

Example

As an Onomatope

gong; bang

1
Tā
他
suíshǒu
随手
guāng
咣
de
的
yī
一
shēng
声
guānshàng
关上
le
了
mén
门
  
。

He banged the door behind him. / He closed the door behind him with a bang.

2
Guāng
咣
de
的
yī
一
shēng
声
diào
掉
dào
到
dìshang
地上

gong on the floor