It has happened to me and my dad several times. I've been hiking in the forest when all the sounds just stop. No birds, no insects no wind, also I saw squirrels just sort of stop and lay on the ground. My dad says this happen to him a lot of times and he feels like something abnormal just happened! I've read about it happening to other people just before something strange happens or they see something weird! There was a story about this hiker who said everything got really quiet for about fifteen minutes and he did not feel safe when it happened.
Forgot to mention that when the sound stopped in the forest, my camera began malfunctioning! The