Removing high pitch noise embedded in audio spectrum

1. How do you block high frequency sound waves?

How do you block high frequency sound waves?

Sound absorbing materials like acoustic panels and soundproof foam are often the best tools for this. The frequency of the noise you're trying to absorb will determine how thick your panels or foam need to be. Thin sound absorbers are all you need to absorb mid-to-high frequency noise (like human voices).