| Autor: |
Song, L., Koopmann, G.H., Fahnline, J.B. |
| Zdroj: |
Journal of the Acoustical Society of America; 6/ 1/1991, p2786, 7p |
| Abstrakt: |
Using the principle of wave superposition, a vibrating structure's acoustic field can be shown to be approximately equivalent to the sum of the fields due to a finite number of acoustic sources located in the interior of the radiating body. Based on this transformation, the total time-averaged, acoustic power output from the vibrating structure can be expressed in terms of the strengths of the interior point sources. Two methods are then used to optimally reduce the acoustic power output from the vibrating body. The first consists of placing a secondary source outside the structure and, by optimizing its source strength, minimizing the total, time-averaged acoustic power output of the entire system. The second method assumes that the vibrating structure's normal surface velocity can be altered such that the total power radiated from the vibrating structure is minimized. |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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