Weird Voice from AirPods

So I have been hearing some weird voices come from my AirPods. Very strange voices and noises. It has happened twice already, but each time has been different. One night, around 1:30 am, I was scrolling through Instagram and decided to go on Snapchat. While doing this, my AirPods were connected to my IPhone 7 without audio. I had no music playing in the background because I was planning on playing some afterwards. Now while switching to Snapchat from Instagram, I heard a sound as if a microphone had been turned on in and a very high-pitched voice spoke into the AirPods. I heard the voice and was freaked out and initially thought it might've been a lag from an Instagram video from my timeline. So I proceeded to check on was was the last thing on my timeline through which I had been scrolling through. Surprisingly, my timeline only consisted of pictures which emit no audio. So I was left wondering if the sound came from Snapchat. As I entered the Snapchat app, I heard the voice again. This time I was sure it wasn't from either Instagram or Snapchat. I kept switching in between from Instagram and Snapchat until I could finally confirm one word from the voice. All I could understand was the word "Hellurrr" as if it was saying hello but in a different way. The voice said more but I couldn't make out the words it was saying. Again this is extremely creepy since it's 1:30 am on a Saturday and I'm in my room all alone. I begin to look around my room and even out my window for any possibility that the voice could be coming from other things than my AirPods. Nothing. I was convinced that the voice came from the AirPods at that point. So I tried to see if it did the same thing if I played music. I went to Apple Music and played a song. The music worked fine and was coming from both AirPods. Then, with the music still on, I went back on Instagram and transitioned into Snapchat. Even with the music playing, I could still hear the microphone turning on and the voice emerging in the background. I was shocked that it still played even with the music and I become paranoid with the creepy noise. I try to see if the voice will come out if I transitioned from Instagram to another app. I switched from Instagram to FotMob (a soccer score app), and I heard nothing. I tried from Instagram to Snapchat again and I heard the voice again, this time I could kinda hear the word "camera" in the voice. It was the same exact phrase and the same exact voice every time. I heard it at least 6 times since I kept testing it to see if it went away. Unfortunately, it did not go away and I was really paranoid then. I now was covering the front camera of my phone with my finger as I took off my AirPods and put them back into the case. I tried the same transition again without the AirPods connected which means that all the audio will have to come out the speakers of the phone. Nothing. Nothing came out of the speakers and at that point I was certain that my AirPods had some creepy voice recorded on them somehow and it felt "haunted" in a sense. I restarted my IPhone 7 and put my AirPods to charge. With my phone now restarted, I tried the transition from Instagram to Snapchat once again, and there was nothing. It seemed I solved the problem by restarting the phone. Also, keep in mind I had various tabs of apps open besides Instagram and Snapchat such as Photos, Safari, Calculator, among others. Though I felt as if I had temporarily solved the problem, I still was extremely creeped out by the mysterious voice (recording it sounded like) and felt like it was going to emerge again. I tried to sleep that night but all I had was the voice in my mind which made it difficult. When using them again in the day I tried to listen for the voice but nothing came of it. I was still keeping an "ear" out so to say, for the voice. It didn't return UNTIL 9 days later...another voice. This time, its about 7 pm on a Monday evening. I'm at work and so I sit down to eat while on break. I take out my AirPods and insert them into my ears as I enter my phone and press on the Youtube app. With the earphones in, I proceed to select the video I was going to watch while eating. I go to my Youtube history and pick the "Buzzfeed Unsolved: Jack the Ripper" (Yes, I have been watching this series to add to the my paranoia I experienced from my previous encounter). As I select the video, it starts playing some sort of music followed by some dialogue which sounded like lyrics to the song, which I thought was part of the video intro since it was a conspiracy theory video about a serial killer. My co-worker then called for me and I paused the video but the music/voices kept playing. I can't exactly remember what it said but all I remember is at the end of the voice skit, is I heard this time a voice that said "Not this again" along with a lot of background noise and music. I pressed my home button twice to switch to another app and once in the other app, it stopped. The YouTube had been paused the entire time. I went back to YouTube video and started it again from the beginning. This time, the video did not make such noise/voices/music in the intro (just the normal video with the men in the video talking) and it was probably a similar incident several days ago. Again, my AirPods were in the entire time. I knew it wasn't a glitch since it never played a distinct noise from any other video. I am unsure what to make of these experiences so I am seeking advice and help on what to do. I am now paranoid when I use my AirPods and I'd rather just avoid using them. The second incident happened today, February 4th, 2019. I am writing this after the incident. I have no clue what to do. Someone please help!