| 摘要 |
<p>This invention provides an acoustic waveguide (100) with a continuous least-energy-surface formed from an upper vertical control curve (106) , a lower vertical control curve (108) , right horizontal control curve (110) and a left horizontal control curve (112) . In addition, a circular throat end (102) and a non-elliptical closed control curve form a mouth (104) such that the continuous least-energy-surface is coincident with the six control curves.</p> |
