The Sound Sensor is Purchasable Equipment in Phasmophobia. You can place a sound sensor on any wall in an environment to help identify what room a Ghost may be haunting.

Strictly speaking, a Theremin uses a pair of antennae that act as capacitors in a specific R/C circuit. Looking at ...

Arduino library for working with the DFRobot 24GHz millimeter-wave Human Presence Detection sensor (SEN0395). - MaffooClock/DFR_Radar ...

Arduino Library for the SparkFun SparkFun Ultrasonic Distance Sensor The SparkFun Ultrasonic Distance Sensor - TCT40 (sen-24805) a user-friendly upgrade to the popular HC-SR04 sensor, offers ...