This is sound check test.
Check
check
check
If you didn't hear it, it is because of 1 of 2 reasons:
1. You are deaf
2. No sound happened.
To test if it is option 1 that has stopped you from hearing the sound check, go find your spouse, significant other or somebody close to you and have them bang, as hard as they can, some pots and pans together within six (6) inches of your ear.
Now that you have done that, you will know what it is like to have kids, or at least be reminded of what it was like to have kids.
LOL.