Bass Trap (or "Bass Trap") is a type of acoustic absorber specifically designed to control low frequencies (bass) in an environment.

Low-frequency waves are very long and carry a lot of energy, accumulating mainly in the corners of rooms as high-pressure zones. Therefore, they are the biggest challenge in acoustic treatment.

It is important to mention that common porous materials, such as thin acoustic foams or even inorganic wool panels, are ineffective for absorbing bass. They work well for mid and high frequencies, but low-frequency waves simply pass through them without being absorbed.

To control bass, bass traps need to be constructed differently:

1. High-Density Porous Absorbers: These are very thick panels (usually over 10 cm) of dense fibrous material (such as rock wool or fiberglass), positioned in the corners of the room. Thickness and density are crucial for them to be able to convert the energy of bass waves into heat.

2. Resonant (or Pressure) Absorbers: These do not depend on porosity. They work with a membrane or panel that vibrates at the same frequency as the problematic bass (such as a diaphragm or a Helmholtz resonator). When vibrating, the panel dissipates sound energy. They are more "tuned" to specific frequencies. Installing bass traps is essential in critical listening rooms, such as recording and mixing studios, to prevent the accumulation of bass from masking other frequencies and creating an irregular and imprecise sound response.