HW4_2007 - Homework 4 Acoustics I due date November 26 2007...

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Homework 4 Acoustics I due date: November 26 2007 The figure shown below shows a typical sound power measurement setup in semi- anechoic chamber (all five surfaces of the room are anechoic, while the floor is rigid. In the figure, Q above the rigid surface is the actual sound source idealized as an acoustic monopole, Q below the rigid surface is the image source of the former. Q Q h r 1 r 2 R h A B θ (1) Show that the rigid surface condition (particle velocity normal to the surface = 0) is satisfied automatically by considering an image source as shown above.
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