Two different meanings of quiet
An echo is sound bouncing around inside your room. Noise intrusion is sound passing from another place through building elements or gaps. Acoustic sheets can be helpful for the first problem, but the second needs a different assessment.
This distinction matters because a room can sound calmer after panels are added while a neighbour's television remains audible.
Find the path before buying panels
Listen at the wall, door and window. Note the time, type and direction of the noise. Footsteps from above, voices from next door and traffic through a window do not have the same remedy.
Ask for tested acoustic data for the exact product and installation. A decorative texture or thick appearance is not a soundproofing specification.
When to involve a specialist
If the aim is to block noise entering or leaving a room, speak to an acoustic professional before paying for a decorative treatment. If the aim is to reduce room echo, we can show you acoustic sheet options and discuss placement with honest limits.