@script RequireComponent(AudioSource)
    // Play impact audio clip at volume 0.7
    var impact : AudioClip;
    function OnCollisionEnter () {
        audio.PlayOneShot(impact, 0.7);
    }

using UnityEngine;
using System.Collections;

[RequireComponent(typeof(AudioSource))]
public class example : MonoBehaviour {
    public AudioClip impact;
    void OnCollisionEnter() {
        audio.PlayOneShot(impact, 0.7F);
    }
}

import UnityEngine
import System.Collections

[RequireComponent(AudioSource)]
class example(MonoBehaviour):

    public impact as AudioClip

    def OnCollisionEnter():
        audio.PlayOneShot(impact, 0.7F)