Arabic conversation heard through iPhone in Japan while using Safari

I was watching youtube through safari, and suddenly i listen to a conversation of arabic person, two of them, even though i have closed my youtube and the safari browser, i could literally turn up the volume and listen to them better, this is the second time, last time was last month, i though first time was just a radio interference, but now that i happened twice, i think i might have been hacked. Although until now, none of my property has been lost, but i am worried

[Re-Titled by Moderator]

Original Title: I could listen to an arab person having conversation with another through my phone even though i have not made any call, i am living in japan