public static bool CheckSphere (Vector3 position, float radius, int layerMask= DefaultRaycastLayers, QueryTriggerInteraction queryTriggerInteraction= QueryTriggerInteraction.UseGlobal);


position Center of the sphere.
radius Radius of the sphere.
layerMask A Layer mask that is used to selectively ignore colliders when casting a capsule.
queryTriggerInteraction Specifies whether this query should hit Triggers.


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

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour { public float sphereRadius; AudioSource audioSource;

void Start() { audioSource = GetComponent<AudioSource>(); }

void WarningNoise() { // Play a noise if an object is within the sphere's radius. if (Physics.CheckSphere(transform.position, sphereRadius)) { audioSource.Play(); } } }