Not all foam panels are created equal. You might have seen colorful foam tiles online. While they look cool, they mostly handle high frequencies, like the hiss of cymbals or sibilance in vocals. Low-frequency problems need something thicker and denser. Studio bass traps are made for this. They absorb energy that cheap foam cannot touch. https://www.prbusinesswires.com/understanding-low-frequency-problems-and-how-bass-traps-fix-them