Since my last article four years ago on the topic of frequency shifting, technology has progressed. Modern hearing aids can capture sounds at their original frequencies and quickly rebroadcast them at ...

Our hearing picks up a limited range of sounds, limits that were used successfully to keep teenagers from congregating outside British grocery stores by a device called the “teenage sound repeller." ...

While academic research shows high-pitched sounds in general can negatively affect pets, no studies exist that determine if, or to what extent, smart plugs specifically cause such problems. A ...