The Science
Until now, creating sound-reduced spaces at events to enable organisers to run meetings, conferences or activations, even in loud, buzzy environments, has been prohibitively costly to budgets, to the environment or both.
It was this challenge which inspired -45dB to design and create this innovative and unique modular solution.
-45dB’s Rooms Do What They Say On The Tin
Inside the rooms, the ambient noise of an event or expo setting is reduced by up to 45dB.
The ambient noise at a typical event in this type of space is around 80dB so the effect inside the room is that the noise of the surrounding event is significantly reduced in the room.
How (and Why) It Works In More Detail
There are four fundamental principles of noise reduction to reduce the transmission of sound from one space to another: dampening, absorption, mass, and decoupling. By applying these four principles in combination, we have created a unique, effective noise reduction system that can significantly reduce the transmission of sound between spaces using our modular, sustainable room design.
We have designed the room with these in mind while still ensuring the materials used allow for a sustainable modular construction which can be built and de-rigged relatively quickly meeting operational and sustainability goals as well as sound reduction aspirations.
More About Principles of Noise Reduction
Dampening
Dampening involves reducing the vibration of surfaces that transmit sound waves. This can be achieved by using materials that absorb vibrations.
Mass
Mass refers to the weight of the noise reducing materials used to reduce the transmission of sound. Heavier materials are more effective at blocking sound than lighter materials.
Absorption
Absorption involves using materials that absorb sound waves to prevent them from reflecting and transmitting to other spaces. This can be achieved by using materials such as acoustic panels or foam.
Decoupling
Decoupling involves creating a barrier between two surfaces to prevent the transmission of sound waves. This can be achieved by using resilient channels or double walls with an air gap.
The Sound Itself
The frequency range and amplitude of the undesirable sound was captured using specialist equipment in a live hall setting.
A series of professional sound tests have been conducted to compare between the external and internal noise levels of the room to ascertain the reduction magnitude of certain frequencies and amplitudes.
The average SPL (Sound Pressure Level) across the range of relevant frequencies measure an average total noise-reduction level of circa 45dB and the spectral peaks in the most offensive areas are flattened.
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