What instrument is this?
 

s000.tinyupload.com/index.php?file_id=07896623641057648956
Does anyone know what this instrument is? The tone in the background is very short length D5 and then a C#5, if that helps.
To me, it sounds wooden, and also somewhat like a bell. IMO, a wood block's sound doesn't seem to fit because a wood block's sound disappears too quickly, rather than slowly fade out like this one.

That extract is from this video at around 0:47

It sounds like a sonar ping........Nice tune!