Superchunk Corner Bass Trap Calculator

The Superchunk Corner Bass Trap calculator computes the geometry of a triangular corner trap, the volume and mass of fill material, and an estimated octave-band absorption coefficient from 63 Hz to 4 kHz. The cross-section is an isosceles right triangle: the hypotenuse faces the room while both legs sit flush against the corner walls. The effective absorber thickness is taken as half the face width. The absorption coefficient α(f) is computed with the Delany–Bazley model for a 1D porous absorber made of mineral wool or fiberglass. Why it matters: corners are the hottest spot for low-frequency room modes. At least two axes of standing waves meet in a corner, and pressure reaches maximum simultaneously for every mode. Placing a large volume of porous material in a corner gives a better return per square meter of floor space than flat wall panels: a single floor-to-ceiling Superchunk delivers 60–150 Hz performance comparable to several 60×120 cm bass panels on a wall. How to read results: the "Quarter-wavelength cutoff" is a rough indicator of the lower edge of the working range; the actual band is usually wider thanks to interference and the corner-loading volume. The octave-band absorption curve shows how flat the trap performs across the bass region — a clear plateau around 80–250 Hz is typical for face widths of 600–900 mm. Material volume and mass let you estimate fill cost and floor loading up front. Common mistakes: installing only one trap in a single corner — gives a limited effect, treating 2–4 corners is recommended for noticeable modal reduction; using a "decorative" face width of 200–300 mm — that construction barely works at 40–80 Hz, you need a deeper one; loosely packing the trap or mixing materials of different densities — the model assumes a homogeneous fill with known airflow resistivity. Next steps: identify the problematic bass modes using the Room Modes calculator and compare the Superchunk with a Helmholtz resonator or membrane absorber tuned to the same target frequency. When the corner has a structural depth limit, consider a perforated resonator as a more compact alternative.