Returns true if there are any colliders overlapping the sphere defined by position and radius in world coordinates.

	var sphereRadius: float;
	
	function WarningNoise() {
		// Play a noise if an object is nearby.
		if (Physics.CheckSphere(transform.position, sphereRadius)) {
			audio.Play();
		}
	}

using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    public float sphereRadius;
    void WarningNoise() {
        if (Physics.CheckSphere(transform.position, sphereRadius))
            audio.Play();
        
    }
}

import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	public sphereRadius as float

	def WarningNoise() as void:
		if Physics.CheckSphere(transform.position, sphereRadius):
			audio.Play()