Biomass from Paddy Waste Fibers as Sustainable Acoustic Material

<table>Measured absorption coefficient of 20 mm thick samples with different fiber weights: —<svg height="7.9625001" id="M28" style="vertical-align:-0.0pt" version="1.1" viewbox="0 0 8.0500002 7.9625001" width="8.0500002" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,7.9)"><path d="M439 255l-206 -206l-206 206l206 206zM368 255l-135 135l-135 -135l135 -135z" id="x22C4"></path></g>
</svg>— 2 grams, —<svg height="9.2875004" id="M29" style="vertical-align:-0.1911pt" version="1.1" viewbox="0 0 14.825 9.2875004" width="14.825" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,8.987)"><path d="M522 230l-457 -244v539l457 -244v-51zM463 254v2l-341 181v-363z" id="x22B3"></path></g>
</svg>— 3 grams, —<svg height="11.2625" id="M30" style="vertical-align:-0.0pt" version="1.1" viewbox="0 0 14.1625 11.2625" width="14.1625" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,11.2)"><path d="M799 12l-7 -12h-758l-7 12l381 643h10zM711 50l-298 503l-298 -503h596z" id="x25B3"></path></g>
</svg>— 4 grams, —●— 5 grams and —<svg height="9.5375004" id="M31" style="vertical-align:-0.0pt" version="1.1" viewbox="0 0 11.8875 9.5375004" width="11.8875" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,9.475)"><path d="M627 0h-562v554h562v-554z" id="x25A0"></path></g>
</svg>— 6 grams.</table>

Advances in Acoustics and Vibration

Biomass from Paddy Waste Fibers as Sustainable Acoustic Material

Figure 8