headphones contain magnets
"Headphones contain magnets, and some of these magnets are powerful," said Dr. William Maisel, a cardiologist at Beth Israel Deaconess Medical Center.
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headphones contain magnets
耳机中含有磁铁
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Maisel said patients with pacemakers and ICDs are told that magnets can interfere with the function of their implants, but they may not be aware that headphones contain the magnetic substance neodymium, which helps with sound reproduction.
CNN: Study: Headphones could interfere with pacemakers