A Canadian whiz kid has published a legitimate scientific study proving restroom hand dryers are bad for kids’ ears, according to a report Tuesday.

Nora Keegan, a 13-year-old from Calgary — whose work appeared in the Canadian journal Paediatrics & Child Health — said she first had a hunch the machines were harmful to hearing four years ago, according to NPR.

“Sometimes after using hand dryers my ears would start ringing,” Keegan told the station. “I also noticed that children would not want to use hand dryers, and they’d be covering their ears.”

So as a 9-year-old, she began testing dryers in more than 40 public bathrooms in Alberta.

During the study, she used a professional-grade decibel meter to measure sound levels from different heights and distances — and found kids are at risk because they’re short.

“Hand dryers are actually really, really loud, and especially at children’s heights since they’re close to where the air comes out,” Keegan said, adding kids’ ears are also more sensitive.

The pint-sized scientist also found that Xlerator-brand hand dryers and two types of Dyson Airblade dryers — all of which exceed 100 decibels — pose the greatest hazard to kids’ ears, according to NPR.

“My loudest measurement was 121 decibels from a Dyson Airblade model,” Keegan said. “And this is not good because Health Canada doesn’t allow toys for children to be sold over 100 decibels, as they know that they can damage children’s hearing.”

A rep for Dyson now says an acoustics engineer from the firm plans to meet with Keegan to discuss her research.

Excel Dryer, the company that sells Xlerator hand dryers, didn’t return a request for comment, the station reported.

The high volume can lead to “learning disabilities, attention difficulties, and ruptured ear drums,” according to her study, which was conducted between 2015 and 2017, and published last month.