Ferrofluid Application for Multimedia Speaker
YU Zhi-ming, Steve Tatarunis · Audio Engineering · 2010
If ferrofluid applied in speaker,the voice coil operating temperatures are reduced and short-term power handling is dramatically increased.And also ferrofluid can provide a uniform radial centering force to the voice coil,enhancing voice coil centering while the lubricating properties of the fluid reduce the harsh sounds associated with coil scrapes and rubs.The recent trend that takes full advantage of the centering effect is the increasingly common use of ferrofluid in compact extended range(and full-range) speakers.But it needs some amendment for speaker design.