- EVP (electronic voice phenomenon) recording: Ghost hunters use audio recorders to capture EVPs, which are believed to be the voices of spirits. They may ask questions or try to communicate with the spirits, and then listen to the recordings for any unusual sounds.
- Thermal imaging: Ghost hunters use thermal imaging cameras to detect variations in temperature, which they believe could be caused by the presence of spirits.
- Electromagnetic field (EMF) detection: Ghost hunters use EMF detectors to measure electromagnetic fields, which are associated with electrical activity. They believe that spikes in EMF levels could be a sign of paranormal activity.
- Dowsing: Ghost hunters sometimes use dowsing rods or pendulums to detect the presence of spirits.
- Ouija boards: Ghost hunters may also use Ouija boards to communicate with spirits.
It's important to note that these experiments are not scientific in the traditional sense, and their results are often inconclusive. However, they can help ghost hunters to build their case for the existence of the paranormal.