QuietWalk 100 sq. ft. 3 ft. x 33.3 ft. x 3 mm Underlayment with Sound and Moisture Barrier for Laminate and Engineered Floors QW100B1LT - The Home Depot
Soundproof Floor Underlayment | Duracoustic S.T.O.P.™ from ASI
QuietSound 100 sq. ft. 25 ft. x 4 ft. x .197 in. Premium Acoustic Underlayment for Tile, Laminate, Floated or GlueDown Wood Floors 0205999 - The Home Depot
Acoustic Underlay for Floating Floors - What is it?
What Is An Acoustic Floating Floor?
STEICO Natural acoustic wood fiber underlayment 3-ft x 2-ft x 6-mm Premium Cushion Flooring Underlayment (90-sq ft /Panel) in the Flooring Underlayment department at Lowes.com