![]() Room acoustics and acoustic properties, decibel A, B and C, Noise Rating (NR) curves, sound transmission, sound pressure, sound intensity and sound attenuation. Industrial areas and/or extremely dense traffic Suburban areas with some commerce or industryĪreas with dense traffic and/or commerce or industryĬity or commercial areas with very dense traffic and/or bordering industrial areas Suburban areas with medium density traffic Rural and outer suburban areas with little traffic Tones or impulsive noise readily detectable ![]() Adjustments to dB(A)Īdjustments to the base level of 40 dB(A): Decibel A - Adjustments to Context Context Sign in to your Google Account to copy and modify an example spreadsheet with the dB(A), dB(B) and dB(C) calculation and the graph below.
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