Ruído criteria (nc) curves e indoor ruído levels

Nc rating sistema para indoor background ruído, recommended nc levels para various building spaces.

noisecriteriacurvesTabela de dados

Overview

Engineering reference data for Noise Criteria (NC) Curves and Indoor Noise Levels in acoustics.

$c = \sqrt{\gamma R T}$

Speed of sound in an ideal gas.

$L = 10 \log_{10}(I/I_0)$

Decibel level.

$\lambda = c / f$

Wavelength = speed / frequency.