When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Ever since I built a receiver more than 40 years ago to pick up RF frequencies around 15 kHz (it ...
Sounds that are lower pitched are less studied than other types. Some say it’s a health hazard. Others have doubts. By Lourdes Medrano/Undark Published Apr 17, 2024 8:00 AM EDT This article was ...
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