In fact i can not understand your question because my english.
If you want make the type sound louder just make your ring tones louder.
If you want make the call sound louder,you can volume on when you are calling.
I think he means the touch tones. In this case, it would be the first one, turn the volume up on the ringer. Settings > Sounds > Ring & Alerts volume. I suggest turning off "Change with buttons" to not accidentally change it from that setting when you're trying to change the volume in an app.