Astrophysicist's gravitational wave research could unlock tinnitus diagnosis

Fiona Panther remembers being under ten years old when her parents carried her into the garden late at night with binoculars in hand. A comet hung in the sky. That moment of looking up through the lenses stayed with her—a seed planted that would grow into something like obsession. Years later, in high school, a physics teacher who had earned his own doctorate in astronomy mentioned, almost casually, that this was a job you could actually do. The idea took root. Now, as a Forrest Research Fellow at the University of Western Australia, Panther spends her days studying phenomena billions of light years away, chasing answers to some of the universe's most stubborn questions.

One of those questions concerns dark energy, a mysterious force thought to comprise roughly 70 percent of the universe. Scientists know the universe's expansion is accelerating—a discovery made in 1998 that earned Australian astronomer Brian Schmidt a share of the 2011 Nobel Prize in Physics. But what is driving that acceleration? What is dark energy, really? The honest answer is: nobody knows. Panther is drawn to this gap in understanding. "The two different most well-known ways that you measure the expansion rate of the universe disagree with one another," she explains. She believes gravitational waves—tiny ripples in space-time produced by violent cosmic events—might offer a new measurement method, one that could reconcile those disagreements and illuminate what dark energy actually is.

Western Australia has been central to gravitational wave research since 2015, when UWA researchers helped develop the technology that detected gravitational waves from colliding black holes for the first time. Panther works within that legacy, using sophisticated techniques to analyze signals from events occurring millions or billions of light years distant. But something unexpected happened as her career progressed. She began talking to colleagues in other fields—neuroscientists, medical researchers—and discovered that the methods she used to listen for cosmic whispers could be adapted for entirely different purposes.

One collaboration in particular caught her attention. Working with a colleague in neuroscience, Panther realized that the same detection technology used to identify gravitational waves could be applied to identifying changes in brain wave patterns associated with tinnitus, the condition in which a person hears persistent ringing or buzzing in their ears. Currently, tinnitus diagnosis relies on what patients report about their own experience—subjective, variable, difficult to verify. Panther and her collaborator are investigating whether gravitational wave detection methods could enable objective diagnosis instead, measuring the neural signatures of tinnitus directly rather than depending on self-reporting alone.

The leap from astrophysics to neuroscience might seem impossible, but Panther sees it as natural. All scientists, she notes, think in fundamentally similar ways: they form hypotheses, design experiments, test predictions. That shared training in objective thinking creates unexpected bridges between distant fields. "If you just get talking to someone, there's usually some common ground somewhere," she says. The techniques that help us understand the accelerating universe might also help us understand what happens inside the human brain when it generates the phantom sound of tinnitus. The same tools that reach across billions of light years could reach into the mechanisms of human perception, turning a discovery made in the depths of space into a tool for diagnosis and treatment here on Earth.