The technological potential of earwax

While most of us consider earwax to simply be an unappealing substance, Alexis Noel, a doctoral student in David Hu’s laboratory at the Georgia Institute of Technology, sees its innovative potential as a high-tech filter for use in robotics and other fields.

Noel attributes her inspiration for studying earwax to an event during a diving vacation. Get rid of fluid in ear Her boyfriend had gotten water trapped in his ear, and nothing seemed to be able to get it out. Fluid in ear toddler Eventually, he had to go to a doctor, who found that the water was actually being held in place by his earwax.

“A couple years later I was reminiscing and thought: why would it block the water like that? And it just started this snowball effect of me and David [Hu] just asking questions about earwax and how it works,” says Noel.


Fluid in ear from allergies They realized that this strange bodily fluid could potentially be a template for developing adhesives for applied usage in technology. Ear and tooth pain But first, its complex behavior must be understood.

She and undergraduate researcher Zac Zachow began investigating earwax by collecting samples from several animals: pigs, sheep, rabbits and dogs. Left ear and jaw pain What they have found is fascinating. Fluid build up around the heart First, the properties of earwax are extremely consistent across these different mammals, which have a variety of ear shapes and sizes. Fluid on eardrum The thickness, the way it flows, and even the appearance is highly similar. Fluid in ears adults This indicates that those properties of earwax seem to be a solution that works well across species.

They also examined the ear canal shapes of different animals and motions of the jaw to see how these factors affect the flow of the earwax and lead to it falling out of the ear. Cervical mucus in early pregnancy It turns out that earwax is a non-Newtonian, shear-thinning fluid, which means is that when left alone, it is very thick and sticky (earwax is as viscous as molasses), but when a force is applied to it, it flows more quickly. Sinus fluid in ear As a result, although earwax is used within the ear for a long time, pressure and motion of the jaw will eventually force it out.

In the ear, earwax is excellent at filtering air. Inner ear fluid in adults In the same way that Noel’s boyfriend’s earwax trapped the water, earwax traps other particles, catching them in a “web” of small hairs coated with sticky wax and protecting the inner ear from debris and bacteria. Cervical mucus in early pregnancy pictures Noel and Zachrow have also found that as earwax accumulates dust, it becomes crumbly “like adding too much flour to dough when making bread,” Noel explained. Leaking clear fluid during pregnancy This allows the dusty wax to separate and fall out of the ear, making room for newer, cleaner wax to continue its work within the ear.

It is these filtering properties that have piqued Noel’s interest for practical applications. Water retention early pregnancy One potential is to create some sort of biomimetic earwax adhesive surface that can be used in a ventilation system for robotics or for other kinds of machinery.

“Obviously you’re not going to have earwax sitting on a Mars rover to protect it from dust,” laughs Noel. Leaking clear fluid early pregnancy “We are still trying to understand what is earwax and how does it work the way it works. Chronic fluid in ear And once we really understand that we can start applying it [to new technology].”