Development of Optophone with No Diaphragm and Application to Sound Measurement in Jet Flow

<table class="table-group" width="800px"><tr class="fig-image" id="a"><td><img alt="909437.fig.004a" src="https://static.hindawi.com/articles/aav/volume-2012/909437/figures/909437.fig.004a.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(a) </b>Physical image</td></tr></table></td></tr><tr class="fig-image" id="b"><td><img alt="909437.fig.004b" src="https://static.hindawi.com/articles/aav/volume-2012/909437/figures/909437.fig.004b.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(b) </b>Control of directivity by multiple photo detector</td></tr></table></td></tr></table>

<table>Relation between sound incident direction and diffraction light pattern.</table>

Advances in Acoustics and Vibration

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Figure 4

Figure 4: Development of Optophone with No Diaphragm and Application to Sound Measurement in Jet Flow 