With this app you can see, very clearly, how you are doing with your volume. You can set the target range that is good for conversation.

 

For me this needs to be a little louder to make up for my poor articulation (I am working on that too), mine is set at 100 dB maximum and 81 dB minimum.

 

All you have to do is open your iPhone to the app and that it on the table front of you. As you talk the levels will rise according to your volume.

 

The goal is to keep your speech in the “green”.  If you are in the “red” you are too loud, if it stays “blue”, your volume is too low.

 

Awesome!!