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." ...

Have you ever seen your cat's ears move around, or your kitty run for no particular reason? You may think they're "hearing things," and you may be right. However, the sounds aren't in your cat's head.

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 ...