My iPhone 4s is making super creepy noises?

So this has happened once before in the car, but I thought it had to do with the Bluetooth. However, my iPhone 4s just started making the noises again. They sound kind of like a fan on a laptop and occasionally there are these noises like light mandolin strumming or something? It's just really weird and incredibly creepy.

I don't have any music like this or have any apps that would make this sound. Whenever it starts making the sound, I check my phone to see if anything is playing, but nothing is. My phone is almost fully updated (I just haven't done the latest update). It seems to go away when I turn off the phone and then turn it back on, but I really want to know what it is and what's causing it. What is it?

Maybe aliens are trying to communicate with you!

  • My iPhone 4 started randomly making beeping noises? I just was sitting in the car and my mom said, "What's that beeping noise?" I listened closely and couldn't make it out. Later we heard it and I put my ear up to my only working speaker. I heard it beeping. I saw the silent button the side of my phone was pulled to the left so you could see the orange mark. I pulled it forward and I thought I still could hear it… Help!
  • My car is making loud noises when I plug in IPhone to cassette adapter? So I have a cassette adapter and I used to play music on my iPad all the time, now I have an iPhone and I'm trying to play music with that but when I plug it in, my speakers start freaking out and sounds like I'm getting really bad static, is this cause of 4g or something? And is there a way to fix it?
  • Isn't it creepy to buy a band's lead singer's iPhone? The lead singer of my favorite band is selling her iPhone on Ebay and I wanted to buy it but I don't want to be creepy. She has a YouTube channel and asked if people would buy it and they said yes and so it's on sale now, but I don't want to buy it and tell my friends and then they call me weird or something. It is my favorite band and I was going to get an iPhone anyway, so I thought "why not?" Is it creepy or am I just being paranoid?
  • IPhone de is making high voltage electricity sounding noises? My iPhone se is making electricity sounds all of a sudden and it's worse if I put headphones in, not only was there a noise coming through my headphones but the earbuds zabbed me. What's happening and how can I fix this? It's worse when plugged in but I've expiranced it while unplugged as well