抄録
Fans are dominant noise source of computer equipments. Their noise can be reduced effectively by louvers with absorbing materials. In order to optimize their noise reduction performance, insertion loss of a louver is simulated by boundary element method (BEM). In this simulation, incoherent vibrating surfaces are used to simulate fan noise sources. Acoustic impedance of a multi-layered absorptive material is calculated using transfer matrix method. Results show that the simulated overall noise agrees with the measurement within 1 dB.
