I have been wondering if sending audio fragments over a phone call would be considered a form of cryptology.
Let's say that you own two mobile phones and say that one of your phones is on the Verizon network and the other is on the AT&T network. You have a friend who also owns two mobile phones. Say that one of his phones is on the T-Mobile network and the other is on the U.S. Cellular network.
One day, you decide to call your friend with your Verizon smart phone and he answers on his T-Mobile phone. Without hanging up on the phone call you just made, you grab your AT&T mobile phone and call your friend again and he answers on his U.S. Cellular mobile phone.
Next, you put both of your mobile phones down on a table and you then put each of them on speaker. You then tell your friend to put both of his mobile phones down on a table and to turn on the speaker on each one.
You then turn on Mute on one of your smartphones and begin speaking to your friend. Every two seconds you press the Mute button on both of your smart phones at the same time, which turns off the Mute on one phone and turns on the Mute on the other phone.
As you are speaking, your friend should hear everything you are saying because he should hear your voice coming over on one of his smart phones. When your friend speaks to you, he does the same thing you did and you should hear everything he is saying because his voice is coming over on one of your mobile phones.
Now, let's say that your phone conversation happened to be listened to/recorded by an outside source. As they are listening, or when they play back the recorded phone conversation, they should hear a phone conversation of two-second long audio fragments followed by two seconds of silence, which should make understanding your phone conversation rather difficult to comprehend.
Moreover, say that more mobile phones are used, thus creating more concurrent phone calls between two parties. On each individual phone call, there would be longer periods of silence between each two-second long audio fragment. This should make it almost impossible for an outside source listening in, or listening to the playback of any of these recorded phone calls to understand the overall phone conversation.
Would sending audio fragments over a phone call be considered a form of cryptology?