Child collider triggering parent collider effects.

What I want to happen:

I want my meteor to trigger a swooshing noise when it is close to an object it can hit.

How I set it up:

I have an object (a meteor) that damages other objects (for example, a spaceship) when it collides with them.

I have attached an empty game object to the meteor and given it it's own collider (trigger) with a wider sphere. This collider does trigger the swoosh.

My problem:

The wide 'swoosher' collider on the child game object still triggers the collision effects that are supposed to be triggered only if the meteor collider hits the spaceship.

Code:

Here is the script attached to the child gameobject that is nothing more than a wide collider. My 'swoosher'. This gameobject is a child of the meteor, whose collider triggers damage (meteor code below).

 public class scriptMeteorSwoosher : MonoBehaviour
 {
     //inspector variables
     public GameObject swoosh1;
     public GameObject swoosh2;
     public GameObject swoosh3;
     
     void OnTriggerEnter(Collider other)
     {
         if(other.gameObject.tag == "starbase")
         {
             //play one of the three sound effects
             int rand = Random.Range(0,3);
             switch(rand)
             {
                 case 0: Instantiate(swoosh1, transform.position, transform.rotation); break;
                 case 1: Instantiate(swoosh2, transform.position, transform.rotation); break;
                 case 2: Instantiate(swoosh3, transform.position, transform.rotation); break;
             }
         }
     }
 }

Here is the code for my meteor.

 public class scriptMeteor : MonoBehaviour
 {
     //inspector variables
     public int spawnTimeMin                = 20;                //minimum seconds between meteor spawning
     public int spawnTimeMax                = 40;                //maximum seconds between meteor spawning
     public float speed                    = 0.1f;
     public ParticleSystem missileHit;
     public ParticleSystem baseHit;
     
     //private variables
     private float spawnTimer;                                    //for recording current spawn time
     private Vector3 direction;
 
     
     // Use this for initialization
     void Start ()
     {
         //generate an initial value for the spawntimer
         spawnTimer = Random.Range (spawnTimeMin,spawnTimeMax);
     }
     
     // Update is called once per frame
     void Update ()
     {
         MeteorSpawner();
         UpdateMeteor();
     }
     //function for moving the meteor to it's new location
     void MeteorSpawner()
     {
         //declare required variables
         float randx;
         float randy;
         float randDirX;
         float randDirY;
         Vector3 tempPos = new Vector3(0,0,0);
         //reduce the spawntimer by one per second
         spawnTimer = spawnTimer -(1 * Time.deltaTime);
         
         //when it is time to spawn the meteor again
         if(spawnTimer <= 0)
         {
             //generate new random x/y coords where maximums are outside viewable game window
             randx = Random.Range (-17.0f,17.0f);
             randy = Random.Range (-10.0f,10.0f);
             
             //make sure it spawns outside the viewable game are but not too far outside
             //width
             while((randx > -16.5) && (randx < 16.5))
             {
                 randx = Random.Range (-17.0f,17.0f);
             }
             //height
             while((randy > -9.5) && (randy < 9.5))
             {    
                 randy = Random.Range (-10.0f,10.0f);
             }
             //if it's above y zero, point it down
             if(randy > 0)
             {
                 randDirY = Random.Range (-180.0f,-1.0f);
             }
             //else point it up
             else
             {
                 randDirY = Random.Range (1.0f,180.0f);
             }
             //if it's left of x zero, point it right
             if(randx > 0)
             {
                 randDirX = Random.Range (-180.0f,-1.0f);
             }
             //else point it left
             else
             {
                 randDirX = Random.Range (1.0f,180.0f);
             }
             //combine the direction for the meteor to go into a new vector3 and normalize it
             direction = new Vector3(randDirX,randDirY,0);
             direction.Normalize();
             //assign tempPos the new vector3 and move the meteor there
             tempPos = new Vector3(randx,randy,2);
             transform.position = tempPos;
             //reset the spawntimer
             spawnTimer = Random.Range (spawnTimeMin,spawnTimeMax);
         }
     }
     
     void UpdateMeteor()
     {
         //just move the meteor forward. that is all
         transform.position += direction * speed;
     }
     //if it collides with anything it needs to do something about
     void OnTriggerEnter(Collider other)
     {
         //if it hits a missile pretend it's destroyed by moving it out of the viewable area
         if(other.gameObject.tag == "missile")
         {
             Instantiate(missileHit, transform.position, transform.rotation);
             Vector3 awayWithThee = new Vector3(0,0,500);
             transform.position = awayWithThee;
         }
         
         //if it hits a starbase, change it's Z position so it will not trigger any more collisions until it is moved again
         if(other.gameObject.tag == "starbase")
         {
             Instantiate(baseHit, transform.position, transform.rotation);
             transform.position = new Vector3(transform.position.x, transform.position.y, 5.9f);
         }
     }
 }