SOUND TRANSMISSION LAW USING THE MASS LAW

版本 1.0.0 (1.5 KB) 作者: RAJA KUMAR
SOUND TRANSMISSION LAW USING THE MASS LAW
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%% SOUND TRANSMISSION LAW USING THE MASS LAW %%
% C J NAIFY 2010, TRANSMISSION LOSS AND DYNAMIC RESPONSE OF MEMBRANE TYPE LOCALLY RESONANT ACOUSTIC METAMATERIALS %
% EQUATION NO 3, PAPER 2 BY LF %
clc;
clear all;
freq = linspace(100, 2000, 1000);
omega = 2*pi*freq;
% Properties of memebrane
% Method 1
rho_m = 1200; % Density of the membrane
thick_mem = 0.0762* (10^-3); % Thickness of the membrane in metre
r_mem = (29/2)*(10^-3);
%rho_s = rho_m*thick_mem; % Surface density of the membrane = (density * thickness) in Kg/(m^3)
% Method 2
mass_eqvt = 0.16*(10^-3); Area_mem = pi* (r_mem^2);
rho_s = mass_eqvt/Area_mem;
% Properties of air
rho_0 = 1.200; % density of membrane
c = 343; % speed of sound in air
TL = 20*log(omega*rho_s/(2*rho_0*c));
figure(1)
plot(freq,TL);
set(gca, 'XScale', 'log')
grid on
title('Sound Transmission loss')
xlabel('Frequency, in Hz')
ylabel('STL, dB')

引用格式

RAJA KUMAR (2025). SOUND TRANSMISSION LAW USING THE MASS LAW (https://www.mathworks.com/matlabcentral/fileexchange/130614-sound-transmission-law-using-the-mass-law), MATLAB Central File Exchange. 检索时间: .

Christina J. Naify, Chia-Ming Chang, Geoffrey McKnight, Steven Nutt; Transmission loss and dynamic response of membrane-type locally resonant acoustic metamaterials. Journal of Applied Physics 1 December 2010; 108 (11): 114905. https://doi.org/10.1063/1.3514082

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