Non-invasive sound therapy offers new hope for Alzheimer’s: study

January 09, 2026 / 6:04 PM

Sharjah 24 – WAM: Chinese scientists have shown that simple, non-invasive sound therapy can trigger significant and long-lasting biological changes in aged monkeys, offering new potential for treating Alzheimer’s disease, according to Xinhua.

Study details and methodology

The research, published in the Proceedings of the National Academy of Sciences (PNAS), was led by the Kunming Institute of Zoology (KIZ) of the Chinese Academy of Sciences. Scientists exposed nine aged rhesus monkeys—whose brains naturally develop Alzheimer’s-like plaques—to a one-hour daily 40-hertz auditory tone for a week.

How 40-hertz stimulation works

The 40-hertz tone, a low hum within the human hearing range, was previously shown in mice to help clear Alzheimer’s-related toxic proteins. In this primate study, key proteins linked to Alzheimer’s, including beta-amyloid, more than doubled in cerebrospinal fluid immediately after treatment, indicating increased waste clearance from the brain.

Long-lasting effects

Remarkably, the beneficial effects persisted for at least five weeks after the treatment ended. "The effect had not faded," said Hu Xintian, a KIZ researcher, highlighting the potential durability of the therapy.

Advantages over current treatments

Unlike some approved Alzheimer’s drugs, which can be costly and carry risks such as brain swelling, 40-hertz auditory stimulation is a safe, low-cost, and non-invasive intervention. Researchers suggest the approach could become a gentle, physical therapy for Alzheimer’s in the future.