Decibel levels don't equal authority. The demonic realm doesn't respond to the volume level of someone's voice, they respond to authority...period.
God doesn't have hearing aids either. It's interesting that when talking to some people, their decibel level is normal in conversations. Yet, when that same person gets onto a stage, they almost become a DIFFERENT person. A casual conversation has turned into a yowling, frothy frenzy.
Loud is great. I have some loud friends that are that way in any context. But, when we think we HAVE to be loud for God to move or the demonic to respond, then we have lost our heavenly vantage point. Jesus has commissioned us and given us HIS FULL authority. We have what we need to see the demonic realm run for the hills and the Kingdom advance.
We need to realize and actualize it while we sail the seas of sonship. Be loud. Shout praises to God. The body of Christ needs to open their mouths. The world is blind when the church is mute. Be yourself and let His authority be the expression of dominion. Also, rest in the authority He has given us and exercise it with a determined diligence.