Robuta

https://www.osti.gov/biblio/2477191
Accurate and quick identification of high-impedance faults (HIFs) is critical for the reliable operation of distribution systems. Unlike other faults in power...
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https://hackaday.com/2020/12/03/cheap-diy-high-impedance-earphones/
Crystal radios can feel magical, given their ability to tune in audio from distant stations with nothing but the energy from the radio signal itself. However,...
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https://support.apple.com/en-is/108351
You can connect high-impedance headphones directly to compatible Mac computers introduced in 2021 or later.
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https://www.arxiv.org/abs/2502.05846
Abstract page for arXiv paper 2502.05846: Enhanced Rapid Detection of High-impedance Arc Faults in Medium Voltage Electrical Distribution Networks
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