Friday, May 07, 2021 15:15

Posts Tagged ‘geophone’

EDI Meter

Thursday, July 16th, 2020

EDI Meter

An EDI Meter combines several meters into one device. It has a thermometer, an EMF meter and a Geophone. There is nothing remarkable about this device, but it does cut down on the amount of kit (and batteries!) that need to be brought on an investigation. It saves have three separate devices to measure the three elements. An EDI is quite a large device, certainly not designed to be in the pocket but this is not the purpose of the device. It should be placed on a table or in a part of the room or space being investigated so that it can be seen periodically. It can be useful to know if the temperature has increased or decreased as well as a spike in EMF energy at the moment that someone in the room heard/saw/felt something or if other meters detect a change.

Like all EMF meters, they are prone to other devices like mobile phones, hearing aid loops and electricity and will pick up these signals with ease. The built in Geophone is very useful as this converts noise into a visual display, so if this lights up when placed in a quiet area or in a locked off room then this would be an excellent device to see the noise if it was inaudible at the time.

We like the EDI because of the compact nature of the device, the build quality is excellent as well as the rugged look and it combines several meters in one device. The new model has a pressure sensor, a humidity sensor and a data logger which for paranormal investigations make this useful to download the data.

This is a purpose-built device for the paranormal and is only available from the US, Ghost Stop is an authorised seller and the cost is $200

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Geophone

Thursday, June 25th, 2020

Geophone


A Geophone is used to see noises. Strictly speaking these are data logging devices to record vibrations or sounds, however we are not after the scientific version, we just need to be able to see when there has been a noise or vibration. The device picks up sounds and converts this into light which is displayed by the device.

Some are round, others and square or oblong and others have a range of lights. The purpose of the device is the same, it is to “see” the noise. Depending on how the device lights up will depend on the loudness of the noise. Some models more lights, light up, others get brighter or different colours.

Whilst these do not measure the sound with any accuracy, these are purely designed to let you know that there is a noise or vibration. These devices are usually very accurate in picking up noise or vibrations that we cannot hear. This is also one of the downfalls of these devices, that any small movement create a noise or vibration. They are however ideal for lock-off situations or where there won’t be anyone present.

This is the reason why we like these devices as we can put them beside some other kit which has a camera pointed at it in a locked off area and know that if the geophone lights up then something must have made a noise.

At one time these were quite simple devices and you pick them up cheaply for about £20 in Maplin. However since their inclusion in the paranormal field and ghost hunting these are now quite expensive and start at about £35 and the top end models are about £80, found on Amazon or eBay.

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