Researchers have developed a battery-free sensor that reacts to sound waves, such as particular spoken words, producing enough vibrational energy to power an electronic device. The novel sensor would ...

Sensors that monitor infrastructure, such as bridges or buildings, or are used in medical devices, such as prostheses for the deaf, require a constant supply of power. The energy for this usually ...

Bloomberg reported almost two years ago that the HomePod mini included a temperature and humidity sensor that wasn’t actually being used. The report speculated that the sensor could be activated ...