What does ferrofluid do in speakers?
In speakers, Ferrofluid is used to liquid cool voice coils, damp resonances and help center the voice coils. All can improve the sound quality and quantity. These are amazingly different applications for an amazing material. Ferrofluid can prevent burning out voice coils in speakers.
What does ferrofluid do in tweeters?
Many speakers produced from 1990 until today have (metal)dome tweeters damped with “ferrofluid.” The concept is that the viscous fluid containing microscopic metal parts, magnetically held in the tweeter voice coil gap, damps resonances as well as cools the voice coil – thus improving sound quality and prevent …
How are magnetic liquids useful?
The motion of liquid droplets can also be guided with external magnets. Thus employed, liquid magnets could be useful for delivering drugs to specific locations in a person’s body, and for creating “soft” robots that can move, change shape or grab things.
What is ferrofluid cooling?
In “Ferrofluid cooled“ tweeters, their delicate voice coil is surrounded by a magnetically conductive special fluid known as ´ferrofluid´. The fluid establishes a thermal connection with the magnet system, allowing effective dissipation of the heat generated during operation.
What is magnetic fluid speakers?
Magnetic fluid technology is used to control the motion of the speaker cone with a dampless suspension. This eliminates the sonic distortion. Sony magnetic fluid speakers can also significantly boost energy efficiency by eliminating dampers. The speakers will play louder with less power.
How long do ferrofluid tweeters last?
It does dry out after ten or more years, depending on on operating conditions. It gets thick and gooey when old. I replaced the ferrofluid a few years ago on two pairs of early ’80s Boston Acoustics speakers.
Can ferrofluid dry out?
Yes, the ferrofluid will dry and the dried fluid retains its magnetic properties.
What are magnetic liquids?
Magnetic liquid is a special kind of nanostructrued magnetic material which consists of a colloidal suspension of tiny (about 10 nm) magnetic particles suspended in a carrier liquid. Because the particles are so small, thermal molecular agitation—Brownian motion—keeps them from settling or coalescing.
How do magnets work?
All magnets have north and south poles. Opposite poles are attracted to each other, while the same poles repel each other. When you rub a piece of iron along a magnet, the north-seeking poles of the atoms in the iron line up in the same direction. The force generated by the aligned atoms creates a magnetic field.
Does ferrofluid freeze?
Ferrofluids are stable colloidal suspensions of ferromag- netic nanoparticles in a liquid carrier. … The results obtained indicate that the physical origins of the observed peaks and magnetic anomalies in ferrofluids are associated with the blocking and freezing effects.