ChikuTaku

ChikuTaku
ちくたく
チクタク

ChikkuTakku
ちっくたっく
チックタック

↓↓example↓↓

means:The sound of a clock hand(second hsnd) moving.
　　　  時計の針が動く音。
 　　　 TickTack(TickTock)

　　　  チクタク

→"ChikuTaku" to tokei no oto dake ga kikoeru.

　"チクタク"と時計の音だけが聞こえる。

　I can only hear sound of a clock's "ChikuTaku".

Tips
+ More often used in sentences such as novels and picture books than when speaking.
　(My personal impression...)

type:sound