1. He will find no discernible source. The audio seems to be coming from the communications network itself.
2. He will still be able to use the speakers for his own speech - this will lower the volume slightly, but his own speech will also be louder so as to be understandable over the music.
no subject
2. He will still be able to use the speakers for his own speech - this will lower the volume slightly, but his own speech will also be louder so as to be understandable over the music.