What Am I Riddles

Question: I am an instrument that you can hear, but you can not touch or see me.

What am I?

Question: When it is alive we sing, when it is dead we clap our hands. What is it?

Question: What gets longer when pulled,fits between breasts, slides neatly into a hole,has choked people when used improperly,and works best when jerked?

Question: A natural state, I'm sought by all.
Go without me, and you shall fall.
You do me when you spend,
and use me when you eat to no end.

What am I?

Question: What always murmurs but never talks, Always runs but never walks, Has a bed but never sleeps, Has a mouth but never speaks