Acoustic pressure in the enclosed cavity affected by particle damping was studied.By inducing the formula of acoustic pressure,the law of acoustic pressure changing with modal shape function was unveiled.The modal shapes of the enclosure cavity were analyzed by the modal test.By equipping the board of which relative displacement is the maximum in lower-order modal shapes of the enclosure cavity with particle damper,the vibration of the lower-order modal is reduced.Then the acoustic pressure of the target po...
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