How bass settles in a room
The room sings back
Walls give a room notes of its own. At the same frequency, bass can boom in one corner and almost vanish a few steps away.
Pick a frequency, then drag the yellow point through the room.
Red and blue mark high relative pressure in opposite phases. Yellow marks the nodes, where pressure approaches zero. The yellow point is the listening position.
20–200 Hz
The room's score
Each line is one of the room's own frequencies between 20 and 200 Hz. When the lines bunch together, the bass becomes harder to control.
Selected mode
Where the room's notes come from
An integer number of half wavelengths fits between each pair of walls. The numbers n, m and p tell you how many fit along the room's length, width and height.
f = c/2 × √[(n/L)² + (m/W)² + (p/H)²]
Calculation, sources and limits
What the map calculates
The calculation assumes a rectangular room with rigid walls and a speed of sound of 343 m/s. At each point, relative pressure comes from the cosine functions along the three axes.
Doors, windows, furniture, materials, flexible walls, speakers and air temperature change the level and can shift the frequencies slightly. The map locates theoretical nodes and maxima. Measure the room before deciding where to put speakers or acoustic treatment.
Formula and sources checked 14 August 2026.