Mute mic during text to speech?

Hello, is there a way to mute the microphone while text to speech is speaking?

Basically I'm using a program that provides voice responses to commands. 

The problem is that when it speaks, it also hears it's speech and tries to execute commands.

I put together something very simple that will mute/unmute the microphone, but it's time based which means I'll have to create quite a few different timers.

Is there a way to monitor tts or sapi to get that time?

This is what I have now.