소음 criteria (nc) curves 과 indoor 소음 levels

Nc rating 시스템 for indoor background 소음, recommended nc levels for various building spaces.

noisecriteriacurves데이터 표

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.