If they were going (or went) encrypted or "silent" as you say, they wouldn't sound like "listening to an AM radio". If you were to hear any sound at all it'd be more like starting at 9 seconds into this clip
If they were going (or went) encrypted or "silent" as you say, they wouldn't sound like "listening to an AM radio". If you were to hear any sound at all it'd be more like starting at 9 seconds into this clip