Because noise is an unwanted sound,
the same mathematical techniques and physics are applicable
The noise of a hard disk drive may be
significantly reduced by a drive cover with optimal
thickness. We have developed a new approach to evaluate
optimal cover thickness.
Determination of the sound radiation from
a vibrating body is difficult because a small portion
of vibration (with a smooth, piston-like shape and small
amplitude) possesses maximal radiation efficiency. Most
standard numerical codes cannot overcome this obstacle.
Our semi-analytical approach provides correct radiated
sound energy and significantly reduces computational