Would these against wall behind a piano reduce volume of a piano?

I don't think so. I'm disappointed by them so far

Can we add these to windows to drown some of the noise outside?

They stick to any flat surface, so I am sure you could. They are easy to cut to fit perfectly in a space. I have then stuck to both walls and doors. I would think you would improve the sound absorption by applying them to windows, but they won't make any room soundproof. And it won't look pretty as you see the adhesive side of the tile.

Do these flex or are they rigid? I'm looking for something that can be on a curved wall.

Did you ever try this? I'm looking for something I can use on the curved back wall of a stationary travel trailer. TIA

Is this product removable from a hardwood door or painted wall after a few months? I can repaint a wall, but the doors are expensive.

I would totally expect the tiles to pull the finish off a door. The adhesive is pretty strong. We pulled some and they pulled paint off the wall and left some adhesive on the wall.

Soundsbay 18 Pack Brick Acoustic Panels Self Adhesive 12x12

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🧱 Transform your space into a sound sanctuary—style and silence, no compromises!

DIY PRO LEVEL SETUP - Self-adhesive backing means zero tools, zero hassle—stick and soundproof in minutes.
DESIGN MEETS FUNCTION - Stylish brick pattern elevates your space while optimizing sound absorption.
CUSTOMIZABLE ACOUSTIC ART - Cut and arrange panels to create unique soundproofing designs tailored to your vibe.
VERSATILE SOUND SANCTUARY - Perfect for offices, studios, or home setups craving professional-grade noise control.
ECHO FREE ZONES INSTANTLY - High-density polyester fiber traps sound waves for crystal-clear acoustics.

These 18 self-adhesive soundproof wall panels, each 12"x12"x0.4", cover 17.4 sq ft with high-density polyester fiber that absorbs echoes and reduces noise. Featuring a modern brick design, they install easily without tools and can be customized for any room, making them ideal for offices, studios, and home environments seeking enhanced acoustic clarity.

Specifications

ASIN	B0C8521ZF8
Best Sellers Rank	#1,268 in Musical Instruments ( See Top 100 in Musical Instruments ) #34 in Recording Studio Acoustical Treatments
Brand	Soundsbay
Brand Name	Soundsbay
Coverage	17.4 square feet
Customer Reviews	4.2 out of 5 stars 473 Reviews
Item Dimensions L x W	12"L x 12"W
Item Highlight	Covers 17.4 sq ft, 150kg/m³ High-Density Polyester, Soundproof Wall Panels for Recording Studio, Home Theater, Office Gray
Item Thickness	0.4 inches
Item Weight	1.5 kg
Manufacturer	Soundsbay
Manufacturer Part Number	S-01
Manufacturer Warranty Description	Not applicable.
Material	Polyester
Material Type	Polyester
Model Number	Brick
Number of Items	18
Product Dimensions	12"L x 12"W
Recommended Uses For Product	Sound Insulation, Acoustic Treatment
Unit Count	18 Count

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