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Category: Room Acoustics

Where to place the mineral wool in cavity for a sound absorption ceiling?

By Emil Ærenlund Posted on January 30, 2025 Posted in Room Acoustics, Sound Absorption

Does it matter where we place the absorption material in a suspended sound absorption ceiling? In short: Yes In not so short: Say we have a suspended wood wool board ceiling, and we want to utilize the acoustic ceiling for …

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Acoustic Ceiling with Diffuse Ventilation

By Emil Ærenlund Posted on December 12, 2024 Posted in Room Acoustics, Sound Absorption

Is Acoustic Ceiling with Diffuse ventilation GOOD or BAD? Diffuse ceiling ventilation uses the open space between the ceiling slab and a suspended ceiling as a ‘plenum’ (fancy word for ‘air-storage’) to push fresh air through the porous suspended ceiling, …

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Room Acoustics – The Basics of Decay Curves

By Emil Ærenlund Posted on October 21, 2024 Posted in Room Acoustics

You can get quite a bit of information out of a room by simply snapping your fingers or clapping your hands.Theoretically you can excite all sound wavelengths (keyword here is: theoretically ) and listen to the whole impulse response of …

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Floating Acoustic Tiles – A good Alternative?

By Emil Ærenlund Posted on August 22, 2024 Posted in Room Acoustics, Sound Absorption

Does floating acoustic ceiling panels/tiles absorb sound more effetely than a ‘normal’ acoustic ceiling? You probably already know the answer – “It depends.” A ‘floating’ acoustic panel is essentially just suspending an acoustic material in singular panels from the ceiling. …

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Standing Waves and Room Modes

By Emil Ærenlund Posted on August 22, 2024 Posted in Room Acoustics

Standing waves occuring In a rectangular room are commonly called ‘Room Modes’ and Can be split into 3 categories Axial modes – one dimensional modes occuring either along the length, width or height of the Room. Also showcased In the …

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Noisy Brew at the office?

By Emil Ærenlund Posted on April 29, 2024 Posted in Noise, Room Acoustics

Does Coffee machines and open Office spaces mix? It depends on the overall noiselevel and peak noise value of the machine, as Well as the distance to the nearest workstations. One Can argue that the slow drip and humm of …

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Reverberation time and Decay Curves

By Emil Ærenlund Posted on April 29, 2024 Posted in Building Acoustics, Room Acoustics

Reverberation time Can be measured with a noise signal or an impulse. Say a noise source is placed In a room and have reached a stationary noise, when the noise source is suddenly turned off, the decay curve can be …

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Aesthetic Sound Absorption?

By Emil Ærenlund Posted on April 29, 2024 Posted in Building Acoustics, Room Acoustics, Sound Absorption

Does aesthetics and room acoustics mix? Short answer: it depends… Long answer: let us take a look at a fairly popular absorption panel that mixes aesthetics and Sound absorption. Notice the sketch below of a typical Wood panel absorber. When …

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Reveberation time, Reflection and scattering

By Emil Ærenlund Posted on June 3, 2023 Posted in Room Acoustics, Sound Absorption

Reverberation Time, Sound Absorption, Reflection, and Scattering! In this section, we will explore these fundamental concepts related to the behavior of sound in various environments. Whether you are an acoustic enthusiast, a sound engineer, or simply curious about how sound …

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