A Study on Reduction of Sound Noise Induced by Disk Rotation in Optical Disk Drives

광 디스크 드라이브의 공력소음 감소에 관한 연구

  • 송인상 (LG전자 디지털미디어연구소) ;
  • 박건순 (LG전자 디지털미디어연구소) ;
  • 최학현 (LG전자 디지털미디어연구소) ;
  • 김수경 (LG전자 디지털미디어연구소) ;
  • 이승엽 (서강대학교 공과대학 기계공학과)
  • Published : 1999.08.01


We study the characteristics of airflow and sound noise induced by disk rotation in optical disk drives. The characteristics of airflow around a rotating disk surrounded by various tray structures are numerically investigated using a commercial CFD program and then compared with experimental results. Sound pressure and intensity caused by the fluid-structure interactions in the CD/DVD-ROM drive are measured, and the effect of the ariflow on the sound noise and disk vibration is discussed. In order to reduce airflow-induced noise and vibration around the rotating disk, tray geometry is modified. Both numerical and experimental studies implemented with different tray models show that the improved tray model alters the characteristics of the disk-induced airflow, causing the reduction of the airflow-induced sound level.


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