Ghostroid Paranormal Detector
$1.11
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About Ghostroid Paranormal Detector
Android version of Pocket Ghost paranormal detector. Subsonic (infrasound), supersonic and audible IIR filters calculate the ParaNormal Quotient(PNQ) at your location.
The magnetic field is also displayed.
An essential tool for the aspiring or professional ghost hunter!
Theory of Operation (Only for nerds) ...
It has been reported that paranormal activity is evidenced by sounds inaudible, or barely audible, to the human ear. Animals, whose hearing is more acute at higher frequencies than ours, are able to detect supersonic sounds, generally above 12-15 kiloHertz or so. For example, dogs are reported to behave oddly during supernatural events. Sounds of very low frequency, less than a hundred Hertz or so, are normally felt rather than heard by humans. The built-in microphone circuitry in most handheld devices is designed to detect frequencies in the audio range, but there is some residual response from the circuitry at the very low (subsonic) and very high (supersonic) frequencies.
Ghostroid uses fast software-based Infinite Impulse Response (IIR) filters to measure the level of sub- and super-sonic sound pressure waves arriving at the microphone. It also measures the audible sound level. The three ranges are shown on the Ghostroid display via three meters, which move dynamically and are updated several times a second. The Para Normal Quotient (PNQ) is calculated from a formula that sums the sound levels in the sub- and super- sonic ranges, and subtracts the audible range value. This yields a number which increases as the sub- and super- frequencies (which are difficult or impossible for us to hear) increase, as compared to the audible frequencies.
The PNQ value is shown by a set of concentric bands at the centre of the display. High PNQ values may be caused by a variety of events: Low frequency rumbling (e.g. from heavy trucks or machinery), High frequency noises (e.g. dog whistles, or keys jangling) as well as Supernatural phenomena (please don't drop your Android when you run away in fright!)
The magnetic field is also displayed.
An essential tool for the aspiring or professional ghost hunter!
Theory of Operation (Only for nerds) ...
It has been reported that paranormal activity is evidenced by sounds inaudible, or barely audible, to the human ear. Animals, whose hearing is more acute at higher frequencies than ours, are able to detect supersonic sounds, generally above 12-15 kiloHertz or so. For example, dogs are reported to behave oddly during supernatural events. Sounds of very low frequency, less than a hundred Hertz or so, are normally felt rather than heard by humans. The built-in microphone circuitry in most handheld devices is designed to detect frequencies in the audio range, but there is some residual response from the circuitry at the very low (subsonic) and very high (supersonic) frequencies.
Ghostroid uses fast software-based Infinite Impulse Response (IIR) filters to measure the level of sub- and super-sonic sound pressure waves arriving at the microphone. It also measures the audible sound level. The three ranges are shown on the Ghostroid display via three meters, which move dynamically and are updated several times a second. The Para Normal Quotient (PNQ) is calculated from a formula that sums the sound levels in the sub- and super- sonic ranges, and subtracts the audible range value. This yields a number which increases as the sub- and super- frequencies (which are difficult or impossible for us to hear) increase, as compared to the audible frequencies.
The PNQ value is shown by a set of concentric bands at the centre of the display. High PNQ values may be caused by a variety of events: Low frequency rumbling (e.g. from heavy trucks or machinery), High frequency noises (e.g. dog whistles, or keys jangling) as well as Supernatural phenomena (please don't drop your Android when you run away in fright!)
All Application Badges
Paid
app
app
Android
2.3+
2.3+
Android app
App History & Updates
What's Changed
v1.12 Support for tablets
Improvements to Sightings list
Protection against missing location information
Sonar beat frequencies changed
v1.12 Support for tablets
Improvements to Sightings list
Protection against missing location information
Sonar beat frequencies changed
Price update Price changed from $0.73 to $1.11.
Price update Price changed from $0.99 to $0.73.
More downloads Ghostroid Paranormal Detector reached 1 000 - 5 000 downloads
Price update Price changed from $1.25 to $0.99.
What are users saying about Ghostroid Paranormal Detector
H
by H####:
by H####:
My app stopped working after three weeks of installation. It says ''there was a problem initializing audio''. Please can you help me fix it. If fixed, I will change my rating to 5 stars.
N
by N####:
by N####:
Sucks its fake
N
by N####:
by N####:
If there are ghosts around this thing blows so bad that the wind will whisk them away
C
by C####:
by C####:
Found tons of ghost at the museum of tolerance.
T
by T####:
by T####:
I found my hemarods
D
by D####:
by D####:
Can we please get an update to keepp the screen awake while using the app? Thank u. Will test the app soon.
E
by E####:
by E####:
I wish it had a way to detect evps better
N
by N####:
by N####:
Awsome apparently for ghost hunting
N
by N####:
by N####:
Fun!
C
by C####:
by C####:
TriedDownloading never downloaded don't pay for it
Q
by Q####:
by Q####:
Love it
M
by M####:
by M####:
Awsome app lol
M
by M####:
by M####:
isn't working at all on epic 4g
M
by M####:
by M####:
Handy investigation tool.
M
by M####:
by M####:
Not sure how it works doesn't seem to do much
K
by K####:
by K####:
Crap. Worked on my g1 and cliq now doesn't work on my captivate.
M
by M####:
by M####:
Crash my phone after use. Htc incredible
Q
by Q####:
by Q####:
Doesn't work! Dev. has not updated. Straight Crap! DO NOT PURCHASE!
U
by U####:
by U####:
Ok. Wish it had sound
Y
by Y####:
by Y####:
Doesn't work and messed up my phone. I want a refund
M
by M####:
by M####:
Nothing works on this app, all non functioning, don't waste your money.
M
by M####:
by M####:
Sucks more balls than a thailand hooker
S
by S####:
by S####:
Terrible app! DO NOT BUY! customer service is also terrible, trying to get a refund and the developer is rude. Not good business, free apps like this
E
by E####:
by E####:
New Power phone. App to be strongly worked
K
by K####:
by K####:
Does what it says but I don't use it much
X
by X####:
by X####:
Works well not a hitch on my samsung galaxy s. Not sure if it actually detects ghosts/ paranormal activity as such but the app runs perfect
K
by K####:
by K####:
I'm not sure if it works. But i don't even understand how to use it. :/
K
by K####:
by K####:
The magnetic field reads the same as other apps I have. Remember it's a phone. If you want top of the line ghost hunting sh!t, be a ghostbuster
K
by K####:
by K####:
This app is constantly at the top of the list when I check my battery usage, even when it isn't running.
Q
by Q####:
by Q####:
Magnetic field meter don't read right, I have a real one to test it. Sound meter works good. Other two meters well, didn't get that far.
K
by K####:
by K####:
I am a paranormal investigator and this application is useless to me. Don't waste your money.
by Q####:
Open the app and shows the subsonic meter, supersonic meter, had to go back to play store to figure out what the other two was. No menu to choose from or any settings. While out in woods get a reading on subsonic meter of about 20 constant and spike to about 45 to 50 occasionally. Is there a fix to get a menu or settings. Also would like to be able to record audio while using the app to be able to analyze later.