25/08/2026
Did you know an estimated six percent of New Zealanders over the age of 13 experience tinnitus? It’s annoying high-pitched ringing in your ears. Globally, the figure is estimated to be more than 740 million.
For Professor of Audiology Grant Searchfield, the numbers represent more than a significant health challenge. They are an opportunity to make a substantial difference to people’s lives.
Searchfield spent 30 years tackling the “gnarly problem” of tinnitus. His research is behind TrueSilence Therapeutics, a digital health start-up taking a personalised tinnitus treatment from the lab to patients.
TrueSilence Therapeutics’ first platform, QCore, uses non-invasive digital polytherapy, combining active and gamified sound therapy through a smartphone app and earbuds. Clinician-prescribed daily activities guide patients through personalised 90-day programmes to help them manage their tinnitus.
The programme targets the three components Searchfield identifies as contributing to the magnitude of tinnitus: loudness, awareness and annoyance.
Searchfield, who grew up with a hearing-impaired mother, was always interested in non-medical, technical health sciences. After graduating as an audiologist in 1994, Searchfield met many patients with tinnitus but found he had few tools to help them, becoming the research he focused on over the next three decades.
TrueSilence’s first rollout to customers is now underway through New Zealand audiologists while the company works towards US regulatory approval.
Read more: https://www.auckland.ac.nz/en/news/2026/08/25/how-30-years-of-tinnitus-research-became-a-start-up.html