Hello again, there are 6 or 8 various brands and types of products for this purpose.
Most of them get decent ratings especially since you are only looking for 20 to 50% noise reduction.
If you have the brand names you can look each up on google and read the reviews...personally I like the Home Depot product best.. it is the lowest cost of all of them and gets very good reviews.
There is also a double thickness sheet rock option with a special thick glue they use to laminate them... its very heavy and difficult to hang on the ceiliing,,not to mention if cost $54.
Read the reviews on the Home Depot product I linked to I think you will see what I mean.
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