Alleged Haunting & possible role played by EMF/Infrasound/psychological

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Some people believed that they have experienced some type of ghostly phenomena.  These experiences include reports of apparitions, unusual odors, sudden changes in temperature and a sense of presence. In a small number of cases, witnesses consistently report these experiences in certain locations, giving rise to the notion that these places are “haunted”. Some alleged haunting last many years and involving large numbers of seemingly trustworthy witnesses. Scientific research in this area aims to discover why this is the case, including the possible role played by magnetic fields, infrasound, and various psychological factors.

Electro Magnetic Frequencies (EMF)

EMF does stand for electromotive force in electronics engineering (also known as voltage), but in the world of “ghost” hunting it is more recognized as an acronym for electromagnetic field. There are conjectures that EMF is correlated either with

(1) induced illusions of ghosts or
(2) the presence of actual spirits.
Ghosts cause EMF fields and need energy to manifest? Our question is what type of evidence is available to prove that a ghost causes or even raises an EMF field?

Like everything else in paranormal research, it’s open to debate. 98% of the time, EMF is caused by unshielded wiring or some other man-made source. However, when you encounter an EMF fluctuation with no apparent cause
(i.e., a higher reading outdoors, many meters away from the nearest power line or electrical outlet or no possible EMF at a particular venue) *in addition* to other activity (EVPs, anomalous photos, etc) or EMF in atmospheric effects.

EMF in atmospheric effects – Connections with water vapor, water molecules, atmosphere temperatures.

As well as absorbing radiation, water vapor emits radiation in all directions. Much of this energy will be recaptured by other water molecules.

The water molecule, in the gaseous state, has three type of transition that can give rise to absorption of electromagnetic radiation. ie Rotational transitions, Vibrational transitions & Electronic transitions
The absorption of electromagnetic radiation by water depends on the state of water.

SPI also discovered the presence of EMF on our hands of sweaty palms.

In high doses EMF can be really unhealthy. They can make you see things that are not there, black spots, dizziness, nauseas, headaches, make you feel like you being watched, hallucinate….etc.


EMF Detectors

emf detectors

We are not Ghostbusters and we are only Investigators, the equipments only captured datas and not Ghost!

What do EMF meters measure? In day-to-day use, electromagnetic field (EMF) meters are used to diagnose problems with electrical wiring and power lines and to get readings on working appliances.

EMF meters detect fields emitted by moving electrically charged objects. Electromagnetic field theory lies at the combination of an electric field, produced by a charged object, and the magnetic field created when the charged object moves.

Electromagnetic fields are created using alternating current and direct current, but with different results. EMF meters measure fields produced by alternating current – the type of electricity surging through your microwaves and television. This current moves back and forth.


Infrasound, sometimes referred to as low-frequency sound, is sound that is lower in frequency than 20 Hz (Hertz) or cycles per second, the “normal” limit of human hearing.

Animals have been known to perceive the infrasonic waves going through the earth by natural disasters and can use these as an early warning. A recent example of this is the 2004 Indian Ocean earthquake and tsunami. Animals were reported to flee the area hours before the actual tsunami hit the shores of Asia. It is not known for sure if this is the exact reason, as some have suggested that it may have been the influence of electromagnetic waves, and not of infrasonic waves, that prompted these animals to flee.

“Frequency Sounds (Infrasound) can cause people to have unusual experiences even though they cannot consciously detect infrasound.” “Some scientists have suggested that this level of sound may be present at some allegedly haunted sites and so causes people to have odd sensations that they attribute to a ghost. Our findings support this ideas.”
Richard Wiseman (born 1966) is Professor of the Public Understanding of Psychology at the University of Hertfordshire in the United Kingdom. His research has been published in leading academic journals, with one Scientific American columnist labelling him “…the most interesting and innovative experimental psychologist in the world today”. Wiseman is known for his critical examination and frequent debunking of unusual phenomena, including reports of paranormal phenomena.

“NORMALLY YOU can’t hear it,” Richard Lord, an acoustic scientist at the National Physical Laboratory in England.
Lord and his colleagues, who produced infrasound with a 23-foot (7-meter) pipe and tested its impact on 750 people at a concert, said infrasound is also generated by natural phenomena.

Reactions to Infrasound

Lord and Wiseman played four contemporary pieces of live music, including some laced with infrasound, at a London concert hall and asked the audience to describe their reactions to the music.

The audience did not know which pieces included infrasound, but 22 percent reported more unusual experiences when it was present in the music.


Their unusual experiences included feeling uneasy or sorrowful, getting chills down the spine or nervous feelings of revulsion or fear.

“These results suggest that low frequency sound can cause people to have unusual experiences even though they cannot consciously detect infrasound,” said Wiseman, who presented his findings to the British Association science conference.

Natural Phenomenon

Infrasound is also produced by storms, seasonal winds and weather patterns and some types of earthquakes. Animals such as elephants also use infrasound to communicate over long distances or as weapons to repel foes.

Psychological factors

Finally, some researchers believed that many of the experiences reported in allegedly haunted locations have a psychological explanation. For example, witnesses may have had prior knowledge about which parts of a building were ‘haunted’, and do become anxious when entering these areas, resulting in mild psychosomatic and hallucinatory phenomena. Alternatively, certain areas may simply ‘look’ haunted (i.e., be especially dark or creepy looking) and again cause people to feel anxious.

Power of Suggestions

Honestly the power of suggestion is probably the #1 reason people
both believe in the paranormal and don’t believe in the paranormal.

Beliefs Systems , Heard, Said, Cultural, Seen, Felt, Myths Happened in unexplainable situations, Judged too quickly, with faiths from religious masters or priest, Astrologers & Psychics etc, that goes through the conscious and subsonscious abilities.   You believe there is, there is.


Law of Heat transfer

law of heat transfer 3 law of heat transfer 1 law of heat transfer 2

Unexplained and strange sounds may also occur due to the weather when its at night.  It can happen when it is cold or when there’s a sudden drop in temperature, then it probably is the building materials (walls and framework) contracting and expanding with the weather. Even new buildings can do this.



The Alleged “Haunting” of a place that can be explained mostly by the few factors mentioned above,  which can be in connections with EMF, in connected with infrasounds that stuck in a venue which can be negatives energies, and the psychological minds thinking of the beliefs system of each individual person. (especially the venue can be rated as defined as haunted).  And also the nature taking  its own place of atmospheric or physics  quantum on all objects that may vibrates, moved, produced sounds or  misjudged by others.   Other scary sounds may be produced by Humans or Animals, insects or creatures.

We may also be scared or “hairstand” caused by the fear factors not just haunting or ghosts.  Since young we may  absorbed from parents, people – hair raising stories that may be exegerated through communications many channels.  The scary movies, ghost books, tales or myths heard through the years causes a belief system.

Meanwhile, if things happened, they maybe a reason!

Happy Halloween 2014!


Research done, analaysed, tested for some and contributed by :
Desmond Wong
Singapore Paranormal Investigators



SPI night Investigation photos at Bukit Batok Park 21-22 Jun 14

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SPI Overnight Investigation at St John’s Island


Contributed by:
Singapore Paranormal Investigators – Paranormal Investigation Unit (PIU)




You may not or yet to experience this. But I’m pretty sure majority had heard this “Marbles Dropping” case.  In Singapore, this usually occurs for those living in HDB (Housing Development Board) flats. Very common on this sunny island.  In some cases, other apartments like condos or even hotels had such occurrences. But mostly came from HDBs, where the residents claimed that they have heard marble sounds coming from the ceiling. Sometimes sounded like coins dropping. It can last for days, weeks, even months. And in some few cases, even sounded like a hammer knocking repeatedly or the shifting of furnitures.


Some had claimed it to be a paranormal issue, where they believed it could be spirits of children playing marbles or coins. This happens when they knew or find out that there’s no one living above them. But quite often this marbles dropping sounds could be attributed to real playful children playing with marbles. Even say so, what if there’s no one above them, especially when the unit is vacant?



This mystery has been going on for years and had affected many HDB residents for as long as anyone can remember. Ask anyone. Chances are most of them will told you or share with you their experience, that they do recall hearing those marbles. Till now, there seems to have no logical explanation behind this natural occurrence.


This occurrence usually was heard during the wee hours in the morning. Sometimes it can be heard during the day. But daytime is quite rare. Take note here, its usually occurs somewhere after midnight. Mostly people heard it anytime from 0100 – 0400hrs.  On the dot of 0000hrs seems rare.






As phenomenon it may seem. But what happened if the noise is not directly on top of your unit but the other top level? If so you may want to ask the neighbour living next door whether do they heard any noise coming from above them. So it may not be necessarily above you, but can also be from the upper levels or lower levels. Due to the noise level, no doubt you can still hear it if it is loud enough.

Just to share as an example, we received an email from this person, saying that his unit which he had rented out to a family had been experience this noises. So bad that the noise even cause their 6 month old child to cry every time the noise was heard. According to the informant, this has been going on for a month. 

Sometimes, as describe by his tenant, the sounds were like coins dropping and hammer knocking. The family thought the neighbour above them was responsible for causing the nuisance. However, the neighbour denied making those noises. Both HDB and Town Council were informed in this matter. But action is yet to be taken.


*The informant’s name and where the tenant resides were not to be disclosed as we respect their rights and privacy.

Thought the informant did hear such stories whereby people claimed that the sounds were made by spirits of children playing marbles, he did not want to come to a conclusion where this got something to do with paranormal. He did not want to scare his tenant about this. So he request for our assistance, to see if there’s any logical explanations behind all this.

Therefore the SPI – PIU began to seek any possible answers online. Even for us, we will not jump straightaway whereby this incident is just another paranormal issue which is nothing new, and what most people had claimed it might be. Cause a few of us had experience this before.

Step by step as the team slowly research. We soon learned that the noises usually occurs when the HDB flats were old. Either it be marbles or coins dropping. And in turn, the piping network which runs within will age gradually, and might even turn faulty. And speaking of old, it was said that marble dropping was known to be very common to old age HDB flat during midnight. You don’t hear it during daytime. To top it up, these are the list of possible explanations that we had dig out from sources and those who have experience this and might know something about it.




1) When water flow is shut off suddenly, the change in pressure rattles the pipes, which may sound like marbles dropping after distortion through walls.

2) Marble sound may due to expansion and contraction whereby the contractors leave little ball bearings inside the floor in between the stories. So during expand and contract, the little metals balls start jumping and moving due to air circulation. And this is necessary so as to prevent cracks.

3) Some pre-fabricated floors used in HDB flats have an embedded high-strength steel cable which can give off creaking sounds (may sounded like marbles dropping) when they contract.

4) The pipes of some air-con units make popping sounds. These sounds resemble marbles dropping when they travel through the pipe embedded in walls. Another possibility is that in some old fridges, the compressor makes this noise which can be heard clearly only at wee hours when it’s quiet.


5) This may also occur due to the weather when its at night. If the sounds only happen when it is cold or when there’s a sudden drop in temperature, then it probably is the building materials (walls and framework) contracting and expanding with the weather. Even new buildings can do this. Steam pipes and water pipes can make some popping noises with the weather changes.


6) At the stroke of midnight, the water tank at the roof of the HDB will send a gush of water down the water pipes to flush the pipes of particles. For older HDB pipes as the pipes are old, there tends to be a few particles in them and get flushed down, causing it to hit the wall of the pipes thus causing the marble dropping noise.


7) Apparently water sounds gets distorted as they pass through pipes and it sounds like falling marbles. Odd but the most plausible.


8) Engineers had placed marble-liked things into the water pipe while they build to ensure the smooth flow of the water. So sometimes when you do hear it, its most probably due to them. Perhaps we hear them more at night due to the silence associated.


Then what about the hammering noise? These are as far as we had dig out.


1 ) Water hammering in PUB water supply pipes caused by prolonged period of no water activity in the water pipes. This causes air volume/pressure to built up in the pipe. When water is re-introduced into the piping system, pockets of air bubbles are formed as the water rushes in to replace the air.

2 ) Soapy water bubbles bursting in sanitary pipes. This usually occurs at night when the pipes are not so often used, and there is a sudden release of soapy water flowing down the pipes. This usually occurs when the higher floor units flushes down sufficient quantity of soap water. A similar bubbly situation would also occur when are already plenty of soapy water at the base of the piping system due to many residents bathing at the same time.
3) Each sanitary pipe stack has vents at the roof top to allow air to escape out. Thus the agitation of the soapy solution will cause bubbles to form and the resulting air pockets bursting will sound like “Pock! Pock! Pock!” echoing in the pipes, sounding like marbles as the bubbles ‘break’ on the surface of the water. Usually marbles sounds of this sort will be only singular sound of 1 marble (means only sound like 1 marble dropping) is heard.

One of us even inquiry with some of the piping contractors to see if there are more possible explanations than what we had dig out. Surprisingly most of them explain some of the things that we had research about. Ours and theirs tallies.

Are we close to conclude it? But then again, could the sounds of marbles dropping on the floor be really due to playful children? Or something else altogether? And you know what they are, as what many people claimed it might be.
Even with the most possible explanations, it still lies a mystery. Apparently there was never, at the present moment of time, to justify of what might have been the actual cause. This is something that most of us will be pondering for ages….
Written by: Mohd Ariffin
Chief of Paranormal Investigation Unit



Written by SPI team, edited by John Kwok, PhD candidate, History researcher

[pictures will be included soon]   

“Sacred” Trees in Singapore

In 2007, a road accident involving a roadside African Mahogany tree at Jurong in Singapore was published in the local press. The focus however, was not the tragedy of the accident, but the tree after its bark was stripped off as a result of the accident and revealed what looked like the head of two monkeys. Local Singaporeans interpreted it to mean a deity living in the tree. Dubbed the Monkey Tree, it inspired local cults to worship at the tree for good fortune, especially praying for winning lottery numbers. Devotees left offerings at the tree and the crowds of people to gather to make them often resulted in human and traffic congestion, much to the displeasure of the residents neighbourhood.

The Monkey Tree was popular in Singapore, but it was by no means a unique phenomena. SPI has discovered that another tree in Singapore, while not as popular as the Monkey Tree, featured evidence of tree worship. This tree was located in the heart of Singapore’s CBD at the junction of Kepple Road and Anson. It was not difficult to spot this tree for it stands at a busy junction.

Of the many trees that line the Tanjong Pagar Complex, this one in particularly, near some office buildings and a hawker centre, was donned with dozens of water bottles hung from its branches. SPI agents made some enquiry from passers-by and office workers nearby. Surprisingly, most did not pay much attention to it or failed to notice the strangely decorated tree entirely. Indeed, it begs the question, why was this tree decorated in such a manner?


Each water bottle was connected to another by a long strip of orange coloured string. Each pair of bottles was hung from branches on the tree and was neatly spaced out; they were not clustered in one bunch. Each bottle was also filled and capped with a clear liquid, believed to be water. There were 32 bottles altogether – strung into 16 pairs. The conditions of the bottles suggest that they were all put up at the same time; there were uniform levels of corrosion on them.

Furthermore, from physical examinations of the bottles, it appeared that they were recently strung up and hung on the tree. Further indications came from the contents of the bottles; the liquid was clear and showed only minute traces of contamination by pollution and weathering. This indicates that the bottles were all hung at one effort, possibly even by the same person or organisation. However, when empty bottles and string were found tucked and hidden away behind the tree, it suggests that more bottles would be progressively added to it, possibly in stages.

In addition to the hanging bottles were several decorated bottles placed near the tree. One in particularly featured detailed flower patterns and made to resemble a lantern. Another, in contrast, also resembled a lantern but was crudely made with plastic rings cut from mineral water bottles and joined together. At the foot of the tree was a strange object made from metal wire. The wire was skilfully woven into a circular object with the ends left sticking up, resembling a pair of pointed horns. A red make-shift tassel was attached to each end of the horns. In front of this strange object were burnt joss sticks stuck on the ground.

There were also traces of joss papers and evidence that a large scale type of offering ritual had been performed at the tree. It reminds one of the offerings made to spirits during the Hungry Ghost festival. It is likely that the wire-framed object was representative of a tree deity or powerful spirit. But while tree worshipping or the making of offerings to spirits at nature objects is commonly performed in Singapore, the main feature of the tree, the practice of hanging filled bottles on a tree is not.

The Investigation

The bottles, filled liquid and hanging from the branches of the tree, reminds some SPI agents of the famous Wishing Tree in Hong Kong. Kenny recalled during a previous case that took him to visit the Wishing Tree in Hong Kong years ago:

The minute we alighted from our vehicle, crowds of aunties rushed up to me asking to buy their joss-sticks. They thought that we wanted to see the Wishing Tree and to toss on it a pair of oranges, tied together by a long red string, for good luck. We quickly and successfully avoided them and instead made our way directly to a make-shift counter set up near a large joss-stick urn.

A devotee at the counter quoted me several categories of prices for their iconic wish-making oranges that come with a stack of joss papers for burning as offerings. The prices reflected the types of wishes one would like to make i.e. individual blessings, family blessings or blessings for success in business. Each type of blessing commands a different price. And they did not come cheap. Blessings start at HKD88 and could climb to HKD1388. I was astonished that a pair of oranges and a small stack of joss papers could command such prices and wondered if I could bring my own offerings. After all, it’s the same kind of offering we are making to the same tree.

It is unfortunate that making a wish or requests for blessings have been turned into well-oiled money making scheme at the Wishing Tree. Elsewhere, making wishes were accompanied by a simple gesture of tossing a coin into a well or fountain. Fortunately, however, recently I have heard that the Hong Kong Wishing Tree is now better regulated with the emphasis on preserving it as a unique local cultural tradition.

When Kenny saw the filled bottles hanging from the tree in Singapore, he immediately drew parallels with the Wishing Tree in Hong Kong.

1. Evidence of burnt offerings at the foot of the tree reinforces the notion that this tree is recognised as auspicious or special like the Wishing Tree or the Monkey Tree mentioned earlier.

2. Oranges are regarded as symbolic representations of wealth, prosperity and good fortune. These are also popular wishes made by believers at the Wishing Tree. There is also a popular belief at the Wishing Tree that the higher the throw and the higher the orange is caught on the tree branches, one’s wishes would be better heard by spirits and the greater possibility that that one’s wishes would be fulfilled.

Singaporeans may have also adopted the tradition of tossing auspicious items on an auspicious tree. Instead of tossing a pair of oranges strung by a long red string up the tree for good luck, local Singaporeans toss instead bottles of water. A former SPI Cultural specialist believes that these bottles were a symbolic representation of a vessel that hold the dreams and wishes of one making the offering. However, there is a more plausible explanation that stem from the symbol of the oranges in Hong Kong; water in local Chinese culture represents wealth and fortune.

The person or organisation who hung the bottles on the tree in Singapore was very likely mimicking practices from the popular and famous Wishing Tree in Hong Kong. The Money Tree in Hong Kong proved very popular in terms of tourism dollars and the bottle tree in Singapore could be an attempt to reproduce similar results in Singapore.

The Consequence

However, the creators of the bottle tree in Singapore may not be aware that their activities have broken the law on littering in Singapore. According to the Environmental Public Health Act, it is an offense to litter at any public place or public street. The items left on and around the tree can be interpreted as litter. Littering as an offence in Singapore carries a maximum fine of S$1,000 for the first offence and S$2,000 for a subsequent offence. The offence may be compounded for S$150 if it is a first offense – the offender must attend a 15 minute briefing on how littering can harm the environment. In 1992, the EPH (Corrective Work Order) (CWO) Regulations was passed, under which litterers may be required to clean up a public place. As from Feb. 2, 1996, the power to arrest those who litter was extended to operators of public vehicles. In 1999, the number of hours which a person may be required to work under a CWO was increased from 3 hours to a maximum of 12 hours, but not exceeding 3 hours per day.

Will the creators of the bottle tree in Singapore return and continue what they started? Or have they realised the gravity of their activities in terms of breaking the law? SPI will keep you updated with these strange hanging bottles.

Tree worship is a cultural belief that worshippers will receive blessings from spirits. Such spirits may directly reside in trees or through the tree they can be communicated in other realms. The spirits can reward worshippers of material requests such as winning lotteries or other wealth. Sometimes the tree spirits can give protection, for example healing illness or safety in transportation.

Tree worship is a matter of worshipping physical objects that is deemed nothing but superstition in skeptics’ eyes. Chinese religious folk beliefs are full of such magical stuffs. In ancient times, when indigenous people did not understand science, plus the fear from the natural environments around them, they placed huge respects on things that are larger than life or relate to their daily survival, such as thunder, rain, moon, sun, mountains, trees etc. Such respects became the primitive elements of shamanism and animism for hoping of some supernatural power would protect them against threats and dangers, that later evolved into a cultural practice. They worshiped most if not all natural substances from stone idols to biological plants and animals (ox, tiger, monkey, snake gods), often in admiration of their physical strengths.

Such physical strengths that appear greater than that of human which might be not understood (or explained) scientifically, were imagined to carry supernatural powers by our ancestors in the old days.

Finding Clues on the Bukit Batok Rape cum Murder




A young lady while jogging in Bukit Badok Reserve Park was gang raped, scorned and she died on the eve of Valentine’s Day 2001. At the opening of Hungry Ghost Festival (12:00am, Lunar 14 July), SPI revisited the original murder scene and investigated using both psychic methods and scientific equipment, hoping to solve the rape cum murder mystery. We encountered a vengeful ‘ring-tone’ ghost that revealed a stunning clue about the possible identity of the rapist.