Google Nexus 4 weird sound problem
Answer from vi.su. in comments (to make it clear for other users)


  Found out solution to this problem. In fact, this is not a problem at
  all. NFC device in the nexus phones is the source for this sound. When
  placed near a RFID / smartcard, it actually tries to read it aloud.
  Galaxy Nexus NFC Weirdness