Nr 騒音 rating

Reference data と engineering information about nr 騒音 rating for acoustics applications.

noiserating

Overview

Engineering reference data for Nr Noise Rating 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.