What is reverberation time?
Reverberation is the phenomenon in which sound continues to bounce off surfaces in a room after the original sound source has stopped. The time it takes for the sound level to decrease by 60 decibels (dB) is called the reverberation time. This is often referred to as RT60.
Reverberation is a natural phenomenon caused by sound waves reflecting off surfaces such as walls, ceilings, and floors. In some spaces, such as concert halls or churches, a certain degree of reverberation is desirable to give the sound a full and rich character. In other situations, such as offices, classrooms, or living rooms, too much reverberation can be disruptive and negatively affect the intelligibility of speech or music.
How is reverberation time measured?
Reverberation time is measured by producing a sudden sound, such as a bang, within the space. The rate at which the sound level decreases is then measured. Special acoustic measuring equipment and software are used for this purpose. Reverberation time depends on various factors, such as:
- The size of the room: Larger rooms generally have a longer reverberation time because the sound takes longer to spread and bounce back.
- The materials in the room: Hard surfaces such as concrete, glass, and metal reflect sound, while soft materials such as carpet, curtains, and acoustic panels absorb sound.
Why is reverberation time important?
Reverberation time has a major impact on how we perceive sound in a room. A reverberation time that is too long can result in a cluttered and unpleasant sound experience. This is particularly problematic in spaces where speech intelligibility is crucial, such as classrooms, conference rooms, and theaters.
On the other hand, a reverberation time that is too short can make a space feel acoustically “dead,” which is undesirable in places like music studios or concert halls.
How can you optimize reverberation time?
To control reverberation time, you can use sound-absorbing materials such as acoustic wall panels made of PET felt. The dense felt absorbs sound waves, thereby reducing reverberation. In addition, adding furniture, carpets, and curtains can contribute to better acoustics.
Optimizing reverberation time contributes to a pleasant and functional acoustic environment, regardless of the room’s purpose. Whether you want a quiet workspace or are seeking an optimal listening experience, controlling reverberation time is essential.
Our standard product line includes 9mm self-adhesive PET felt panels. For custom solutions, we also offer 18mm and 25mm panels. For larger spaces that require acoustic panels, we also offer 40mm insulation made of polyester wool or cellulose. By installing this insulation in a cavity structure and covering it with the design panels, you can easily and cost-effectively cover a larger area—from a movie theater to a conference room or even your living room.
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