Study showing how transients are used to produce vocalizations and other annoying resonances:
Samples of actual recordings using the simple E-Field sensor pickup:
Simple pickup and recording methodolgy used to record and measure E-Fields and vocalizations:
Spread spectrum study of scanning acoustic waveforms that produces Tinnitus effects:
Actual recordings of Tinnitus effects taken outside the ear using a wide band contact microphone:
Actual recording of sounds taken within the acoustically shielded ear canal:
Study showing methods for the introduction of modulated resonant transients into the power line:
To see various ideas for coupling pulse generator and
other related circuitry to the power line see
Power Line Coupling Methods:
http://www.geocities.com/luisferm/pdf/plc.pdf
Recorded ample of actual test-tone used to determine
ferro-resonance in domicile, as descriibed in above text:
sampling rate is 8000Hz
Recording is approx 11 seconds long
Download file size is approx 173Kb
Recorded ample of actual pulsed transients taken betrween the neutral
and ground wires in the domicile.
sampling rate is 44,100Hz
Recording is approx 2 seconds long
Download file size is approx 173Kb
Actual E-Field Recordings:
Various vocal nuances may indicate more than one individual
Vocal sequences can cycle in 3 minute or 5 minute repetitions for
hours at a time and indicate that at least some portions are recorded
to CD-ROM or some other similar storage/playback medium.
sampling rate is 6000Hz
Recording is approx 27 seconds long
Download file size is approx 322Kb
Various shorter segments :
All sampling rates are 6000Hz
All below download file sizes are approx 60Kb
jan_how_are_you_how_are_you.wav
Recording Sensor Setup Illustrations:
Simple dipole screen arrangement functions like plates of a large air capacitor
and responds to changes in electric charge either in-between or on outer sides of
the screens. More screens can be added to increase the sensing area with the only
precaution necessary being that the screens are not grounded anywhere.
This setup works well to pickup local E-Fields and will not pickup
very much H-Field.
The parallel resistor is used so that large Electrical potentials cannot build up
across the screens and damage input circuitry of the recording equipment.
The setup will probably also detect the approach of local electrical storms and it
would be wise to disconnect the sensor from the input circuitry during any local
electrical storm activity.
If the setup is used in the basement, then only very local E-Field activity has any possibility of
being detected. Even local electrical storms do not have that large of an effect and the
disconnection of the sensor from recording equipment during local storms is suggested merely
as a wise precaution in the event of a very close lightning strike.
Electric
Field Strength Meter
Lavonda Begay
November 2000
Abstract
As a participant of the Research Experience for Undergraduates
Program in the Electrical Engineering Department at Arizona State
University, I chose to do research on an electromagnetic field
strength meter. Eventually, the project topic changed to electric field meter ...
http://ceaspub.eas.asu.edu/nsfreu/lavonda/e-field-meter.html
NOTE: The same screen setup used for the recording methods illustrated above
can be used for the E-Field Meter setup illustrated in the diagram below.
The parallel 500K-1Meg resistor should be removed when used in the Meter Mode.
E-Field Meter Setup Illustration:
The Acoustic Component:
Below is a spectrogram Waterfall taken using a wide band contact microphone.
Waterfall clearly shows a slowly scanning acoustic waveform present on all adjoining
wall structures.
The acoustic waveform slowly scans in frequency between approx 5Khz on the low
end to above 22Khz over perhaps several hours or so of time.
This acoustic waveform is interpreted as Tinnitus and also produces other resonance's
with operated appliances and ambient room sounds.
It would be hard to imagine any natural sources for such a slowly scanning acoustic waveform.
Samples of this waveform are also available for download which clearly indicates that Tinnitus
within the domicile is not a result of any medical causes.
Actual recordings of induced scanning Tinnitus sounds:
Sample of sweeping Tinnitus type acoustic sound at approx 12Khz
sampling rate is 44,100Hz
Recording is approx 2 seconds long
Download file size is approx 175Kb
Sample of sweeping Tinnitus type acoustic sound at approx 5Khz
sampling rate is 11,000Hz
Recording is approx 2 seconds long
Download file size is approx 40Kb
Ear Canal Microphone recordings and description:
This recording was made using a Miniature Electret Microphone Element
which was inserted into the left ear canal and then acoustically shielded
with 1/2" thick high density Poly-Urethane sheet. The recording equipment was
a good quality TEAC Tape recorder and direct to hard drive.
May 22, 2001 approx 3:00 PM EST
A 6mm Diameter X 5mm long Panasonic (Part # WM-60AY) Miniature
Electret Microphone Element was soldered to approx 4 feet of good quality
shielded cable and connected to the appropriate circuitry as found in the
Panasonic Applications Notes. (See Circuit Image below for details)
An appropriate RCA style Jack was used so that it could be plugged directly
into the Line-In of the TEAC Tape Recorder.
The Microphone end was further shielded with a wrap
of adhesive aluminum tape and covered with tissue paper.
The Mic Element was carefully inserted into the ear canal of the subjects left
ear. All electrical and electronic equipment in the home was shut off with the
exception of the TEAC Tape recorder as well as all doors and windows.
Three layers of 1/2" thick high density Poly-Urethane sheet approx 12" square
were placed on a counter top and the left side of the subjects head was placed
down on the rubber sheets. This was done to further eliminate background
noise to the Microphone.
A 30 second recording was made first to the TEAC Recorder and then a second
30 second recording was made direct to hard drive for comparison .
The results form the TEAC Recorder were also recorded to Hard Drive for analysis.
The recording was then edited using Cool Edit so as to enhance
the 2 major frequencies that were heard by the subject during the time of the
test.
Pass Filters were applied at 420 Hz and 5700 Hz to augment the effects of
the recording although both these frequencies are clearly audible without using
any filtering.
The familiar 420 Hz tone which is prevalent in other samples contained on this
site as well as the Tinnitus effect are clearly audible.
The Mic Element was approx 1/4" from the subjects eardrum.
In other words, you are hearing what I am hearing right at the ear drum.
Both the TEAC recording and the recording direct to hard drive provided
essentially the same results.
.WAV file format is suitable for Windows based PC sound systems.
.WAV sound recording is approx. 2 seconds in length,
File size is approx. 185 Kb
Schematic diagram for ear canal microphone circuitry:
end: