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Studio Essentials

Why You Should Design Your Recording Room in a pentagon

by Foroomaco Expert 26 May 2023

Why You Should Design Your Recording Room in a pentagon


the conch on beach

Do you remember picking up conch shells on the beach when you were young and hearing them in your ears?

Inside the shell of a conch, you can hear the sound of the sea breeze.
This is because of a natural phenomenon called "resonant sound."
In closed spaces, "resonant sounds" naturally occur.

This happens not only in the shell of a conch, but in all closed spaces, even in paper cups, and in your bedroom.

Cover your ears with a paper cup right around you to create a closed space.

You can hear a "shhh-." This is the resonance sound.

The reason why the sound is smaller than in the case of conch shells is that paper, the material of paper cups, absorbs sound.

The larger the space, the lower the frequency of the resonant sound.

You can hear a relatively high resonance sound in a small paper cup, and you can hear a lower resonance sound when you use a larger cup.

According to this theory, the space you want to make into a studio will produce a resonance sound with a lower frequency than a paper cup.

In general, the design of the space that we often meet is a rectangular parallelepiped structure.

This structure can free up as much free space as the allocated floor space, but it creates a lot of problems when used as a studio.

There is a formula for finding resonance sounds that can cause problems in your space.

Using this formula can help you identify the resonant frequencies that may be problematic in your space and solve the problem.

Resonance frequency (Hz) = 172 / Length (m)

According to this formula, a room with a horizontal size of 1.72 meters produces a resonance sound of 100 Hz, and a resonance sound of 50 Hz is generated at 3.44 m.

This means that a room with a width of 1.72 meters and a width of 3.44 meters produces a resonance sound of 100 Hz and 50 Hz.

If this happens, 100 Hz and 50 Hz are always occurring naturally in your space, making it difficult to record or monitor sound accurately.

The simple solution to this problem is to create and install a Bass Trap in the room that can reduce the frequency by identifying the frequency that may be problematic with the results calculated by the formula above.

But the problem doesn't end here.

Not only will there be two resonant frequencies, but there will also be integer harmonic frequencies of each resonant frequency. (e.g., 100, 150, 250, 200 Hz…)

Walls facing each other parallel to each other (wall and wall, or ceiling and floor) generate resonant frequencies depending on the length of the wall and wall, which boosts or dips the room acoustic of your space.

To address this problem, the studio room design is designed as an odd-shaped shape.

The studio, designed in a pentagon, has no parallel-facing walls.
(If the ceiling and floor are still parallel, this is also a problem to be solved.)

The pentagonal walls all have different lengths of facing walls.
This makes a big difference from the structure of the quadrilateral.

Rectangle Room Design

A quadrilateral structure generates the same resonant frequency parallel to the opposite wall by its width. This means that a particular frequency is boosted in one space, causing serious errors in recording and monitoring.



Pentagon Room Design

However, if you design your room a pentagon to eliminate the presence of a flat-facing wall, the length of the facing wall will continue to change, resulting in a lot of resonant frequencies, but no overlap.

A myriad of non-overlapping resonant frequencies are generated, not just one resonant frequency. This means that there is no resonance problem in the space.

By changing the studio's room design to an odd shape, you can improve the critical room acoustic issues that inevitably occur in small spaces.

So what about people who can't easily redesign their studio space?


Delta Bass Traps on corner

First, the easiest way to fix the problem is to install Bass Traps in every corner.

Bass Trap reduces the low resonant frequencies that are common in small rooms, which can improve the Bass problem that is inevitable in small rooms.

A rectangular space has two critical points that can cause Bass Problems.

It's the Dihedral Corner where the wall meets the wall and the Trihedral Corner where the ceiling meets the two walls.

Low frequencies have diffraction properties, which boost in the corners of the space, increasing the overall amount of low sound in the space.

The Bass Trap installed in the corner can improve the Dihedral Corner Bass problem.

Foroomaco Triangular Pyramid Bass Traps can be installed in the Trihedral Corner the most critical point in your space, to improve the Bass Problem in a hard-to-redesign studio space.

Second, direct reflection sound from parallel walls should be reduced.

There are three facing walls in your space. Front and back, left and right, ceiling and floor.

On the opposite wall, frequencies hit each other and either boost or dip, ruin the room acoustic.

Install the Acoustic Panels properly to absorb and reduce unnecessary reflective sound

And also Installing the Acoustic Diffusers are to prevents the space sound from drying out too much.

Foroomaco Acoustic Foam Panels are designed with a Honey-Bee Structure design that effectively reduces unnecessary reflection, helping to improve room acoustic issues such as Flutter Echo and Comb Filter Effect.

By properly installing Bass Trap, Acoustic Panels, and Acoustic Diffuser, even the hard-to-redesign studio can also improve room acoustic problems.

Recording and monitoring are never accurate in a space without room acoustic treatment. In the problematic space, the problematic result is bound to come out.

Improve your studio with simple steps and perfect the quality of your music!

Mail producer and Female singer recording in studio

Make your Dream Studio


-Ted Kim
House Live Engineer of Free Bird, a live house with the history of South Korea's indie music scene.
Single album/Regular album/Live recording, Mixing and Mastering experience of various rock and jazz musicians

Knowledge that you must know at Recording

In today's era of home music production, it's important to understand the essential knowledge required for the entire process.
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