All my life I’ve been told to talk more, speak up more, make more noises.
Let me tell you, that is a waste of time. Instead of wasting energy on combating introversion, embrace it.
Do not waste time forcing yourself to talk more for the sake of talking. Allow yourself to immerse into the environment and people, figure out where you can contribute meaningfully. You will make more noise naturally because you found the right outlet and timing to do so.
So, do not appease the extrovert, no matter how oppressing.  You waste everyone’s time with meaningless repetitive comments for the sake of showcasing your voice if you give in. 
And do not worry, there’s always a fellow introvert somewhere in there who is silently rooting for you. After all, the loudest in the group are always the extroverts.
And as for the extroverts, my advice is really, leave the introverts alone. Don’t use quantity of voice heard as a measurement for contribution, but instead, use quality of meaningful things said as such.
Let yourself be, and things will follow, especially if you have the drive to make what you’re doing better.
1. Granted, if they just don’t get it.. It’s time to leave that circle. Some people will just be assholes no matter what. That’s another post all together: there will always be assholes.
2. Because fuck teachers which use this as a measurement for “participation” grades. It’s really the worst.