Acoustic Guides & Tutorials

In-depth acoustic engineering tutorials backed by physics calculations, room mode solvers, and 3D simulations.

Glossary

Room Modes (Standing Waves)

Natural acoustic standing waves formed by sound reflecting between parallel room boundaries, creating bass peaks and nulls.

RT60 (Reverberation Time)

The time required for sound pressure level to decrease by 60 decibels after the sound source has stopped.

First Reflection Point

The boundary mirror coordinate where speaker sound reflects directly to the listener within 20 milliseconds.

Comb Filtering

A phase interference artifact caused when direct sound combines with delayed reflected sound, creating a series of notch filters.

Schroeder Frequency (f_s)

The crossover frequency separating low-frequency discrete room modes from high-frequency specular reverberation.

Flutter Echo

A rapid, ringing echo sound created when high-frequency sound bounces repeatedly between two hard parallel walls.

Bass Trap vs Acoustic Panel

Comparison between thick porous/pressure bass traps targeting low frequencies (<200Hz) and standard mid-high absorber panels.

Absorption vs Diffusion

The difference between removing sound energy from a room (absorption) and scattering sound energy evenly across time and space (diffusion).