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<a accesskey="1" href="page.php?w=acoustic_wave_equation&amp;p=9">1.Previous</a><br />
<a accesskey="3" href="page.php?w=acoustic_wave_equation&amp;p=11">3.Next</a>
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<p>and  is the <a href="page.php?w=speed_of_sound">speed of sound</a>.</p>

<p>A similar looking wave equation but for the <a href="page.php?w=vector_field">vector field</a> <a href="page.php?w=particle_velocity">particle velocity</a> is given by<br/>
:.</p>

<p>In some situations, it is more convenient to solve the wave equation for an abstract scalar field <a href="page.php?w=velocity_potential">velocity potential</a> which has the form <br/>
:and then derive the <a href="page.php?w=Physical_quantity">physical quantities</a> particle velocity</p><p>
<a accesskey="1" href="page.php?w=acoustic_wave_equation&amp;p=9">1.Previous</a><br />
<a accesskey="3" href="page.php?w=acoustic_wave_equation&amp;p=11">3.Next</a>
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