Reducing Railway Noise with Porous Sound-Absorbing Concrete Slabs

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static-preview.hindawi.com/articles/amse/volume-2014/206549/figures/206549.fig.003a.svgz" name="206549.fig.003a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>Physical picture of a Sheng Wang impedance tube</td></tr><tr class="fig-image" id="b"><td><object data="https://static-preview.hindawi.com/articles/amse/volume-2014/206549/figures/206549.fig.003b.svgz" name="206549.fig.003b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>Working principle diagram of an impedance tube</td></tr></table>

<div>Configuration of the impedance tube.</div>

Advances in Materials Science and Engineering

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Figure 3

Figure 3: Reducing Railway Noise with Porous Sound-Absorbing Concrete Slabs 