How do I set up "hit impact sounds" in Unity ?

Hi,
I was wondering how to set up “hit impact sounds” in Unity 3D.
Could someone please help me out here,by giving me a simple demonstration and/or example ?

For example try this attached to your gameobject you want to detect the collisions:

var crashsound : AudioClip;

Function OnCollisionEnter(other:Collision){
if (other.gameObject.CompareTag(“Scenery”))
if (audio.clip!=crashsound)
{
audio.clip=crashsound;
audio.PlayOneShot(crashsound);

}
}

Thanks.
I will give it a try.