Structural and acoustic noise radiated by compact disk drives (original) (raw)

Journal of the Acoustical Society of America, 2005

Abstract

Optical drives inside PCs typically operate at high speed, which may result in significant noise. These drives function both as airborne and structural vibration sources. Three main paths can be distinguished through which noise is emitted to the surroundings: (1) the vibrations of the front of the optical drive emit noise directly into the far field, (2) the sound waves induced by the vibrations of the faces of the optical drives inside the enclosure excites the enclosure, and (3) the structural path from the mounting points of the optical drive to the enclosure. The techniques used to determine the contribution of each path are described and the results of an experimental setup are presented in this paper. The contribution of the structural path is determined by comparing the results of a normal setup with the result of a setup for which the structural path is eliminated by mounting the CD drive on a support that is structurally uncoupled from the PC. Direct measurements of the pressure with a scanning microphone were made. Also, a reconstruction of the pressure field using the boundary element method based on the measured surface velocities of the main radiating surfaces was made.

Ysbrand Wijnant hasn't uploaded this paper.

Let Ysbrand know you want this paper to be uploaded.

Ask for this paper to be uploaded.