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.

Arduino Library for the SparkFun Air Quality PM1/PM2.5/PM10 Sensor - BMV080 The SparkFun Air Quality PM1/PM2.5/PM10 Sensor - BMV080 (Qwiic) is an ultra-small, fan-less air quality sensor for sensing ...

Parabolic Microphone Overview The official description reads: This can detected paranormal sound through walls at a great distance. This is a portable version of the sound sensor.