When evaluating Silent Roof Material, the level of reduction in rain noise, when stated in decibels (db), can sound like a modest number on paper, but its real-world impact on a building’s interior or surroundings is dramatic.
The Perceived Loudness (How It Feels)
Human hearing does not perceive sound levels linearly. A small drop in decibels results in a massive drop in perceived volume.
The 10 dB Rule: In acoustics, every 10 dB drop halves the perceived volume of a sound.
A few years ago, Cass Allen, an independent architectural and environmental acoustician and noise and vibration engineer, tested Silent Roof Material for rainfall noise reduction.
Their findings demonstrated that Silent Roof delivered a measured reduction of 12.9 db in the test environment.
In reality, the sound energy, i.e. the raw physical power of the rain hitting and vibrating the roof, is reduced by 12.9 dB; this means it stops 94.9% of the sound energy.
