How does exhibition flooring affect stand acoustics?

Exhibition flooring affects stand acoustics in two ways. Footsteps and wheeled traffic generate noise directly on its surface. Sound from conversations, music and public address announcements also reaches the flooring, where some is reflected and some may be absorbed. The covering acts directly on noise produced on the surface. Its influence on reflected sound depends on how it works with the other surfaces around the stand.

On a hard surface, each step is audible as a brief impact, while wheeled cases and transport trolleys can rattle across the stand. Resilient flooring gives slightly beneath heels and wheels, spreading the impact over more time and reducing the force peak. The hard, high-frequency components may therefore be less prominent. The effect on rolling noise also depends on the type of wheel and the substrate beneath the covering, so no general outcome can be assumed. Because these sounds occur alongside speech, they are often conspicuous at the stand.

Smooth, dense coverings reflect most of the sound reaching them. Open-porous rubber tiles made from rubber granules bound with polyurethane may absorb some sound. Air movement slows within the connected pores, converting some acoustic energy into heat. Some sound passes through the layer and is reflected again by the firm substrate. The scale of this effect cannot be stated without measurement. Furniture, exhibits and people also conceal parts of the floor area and scatter sound.

For conversations at a stand, reverberation is usually less significant than the level of noise entering from aisles, public address announcements and neighbouring stands. Stand design is the first consideration. Closed perimeter walls can block some incoming sound, absorbent internal surfaces can limit reflections, and a meeting area away from the aisle increases the distance from noise sources. Suspended acoustic elements above the meeting area require approval from both the organiser and the venue. The flooring complements these measures but cannot replace them.

The subfloor and overall flooring assembly also affect noise at the stand. Modular platforms and other components prone to vibration can resonate under footsteps or wheeled traffic and produce an audible low-frequency drone. Flooring laid directly on the hall floor has no cavity beneath it. Rubber tiles with click connections are laid without a substructure. Made from rubber granules bound with polyurethane, their resilient, open-porous structure can reduce footstep noise. During prolonged standing, the elastic surface can also reduce strain on the legs.