You might consider getting a sound meter to help evaluate the noise reduction. There are a bunch available on amazon some are very cheap. This is the one I have:
https://www.amazon.com/dp/B000EWY67W
JKJ
You might consider getting a sound meter to help evaluate the noise reduction. There are a bunch available on amazon some are very cheap. This is the one I have:
https://www.amazon.com/dp/B000EWY67W
JKJ