Tag Archives: high frequency noise

EMF Testing Indoor Air Quality Radon Gas Testing: 214.912.4691 Dallas – Houston – Austin – Fort Worth

Powerline Home Safe Distance Cell Phone RF Surveys

Cell Tower Site on High Voltage Power Line near homes in residential area in North Dallas – EMF Testing and Surveys

EMF Testing / Magnetic Field Survey & Safe Distance Measurement Services

EMF testing for those concerned about living near powerlines and feeders is available for commercial clients and large scale residential with reports that range from verbal to complete reports with photo documentation and graphics. We also provide consultation on viable strategies and products for EMF protection. We travel all over Texas and cities in adjacent states including Dallas, Houston, Fort Worth, Austin, San Antonio and Oklahoma City.

Implanted Biomedical Device EMF / EMI Measurement Compliance Surveys and Testing for Patient Safety

Medical Device Compliance Testing (Pacemakers, Implantable Defibrillators, ICD’s etc. – Medtronics, St. Jude Medical, Boston Scientific, Mortara) for individuals returning to work or home after implant surgery to identify potential hazards from AC/DC Magnetic and Electric Fields, Microwaves, RF and general EMI (Electromagnetic Interference).

RF (Radio Frequency) Scans and Evaluations – Maximum Permissible Exposure (MPE)

We test RF energy for frequency and amplitude in order to find sources and evaluate safety with respect to FCC regulatory, compliance and precautionary guidelines, and to determine potential interference issues between wireless routers, cell phone repeaters / boosters, Radio Frequency Identification (RFID) systems, and wireless microphone / audio / video data systems.

Magnetic / Electric / RF & EMF Shielding Consultations including proper grounding

If you have an issue with electromagnetic energy that is either a safety issue or causes equipment interference, we are fully qualified to assess, troubleshoot and make sound recommendations to fix or mitigate the situation.

Radon Gas Measurements & Surveys (Short / Long Term Testing)

With a background in radon and radiation safety, we are capable of evaluating and reporting on radon gas levels, how they compare with EPA standards and whether a mitigation solution is called for. This is now a common requirement for HUD, Fannie Mae, Freddie Mac, structures that fall under GSA guidelines, etc.

EMF Testing for Electrical Wiring Issues Indicated by Excessive EMF Fields

Whether you believe in the safety hazards of EMF or not, the most common source of high EMF fields inside the home is improper wiring which fails to conform to current NEC code. ScanTech can detect and direct repairs on electrical wiring that manifests as an abnormal magnetic field.

Preliminary Construction Surveys / Property Transfer Phase I Environmental Site Due Diligence Survey testing regarding Indoor Air Quality (IAQ) – EMF Consultation for Safety and potential EMI – Radon Testing for Multi-Family Dwellings and Commercial Buildings.

We are often called out to site before a structure or complex is erected in order to survey and communicate any possible issues and the potential impact of nearby power lines, substations, transformers, cell towers and other EMF/RF generating sources. We also make construction recommendations for minimizing electromagnetic field emissions for safety and electromagnetic Interference concerns with sensitive manufacturing and research equipment.

Indoor air quality testing for VOC levels regarding Certificate of Occupancy permits according to City of Dallas Green Ordinances. Also known as the 804.2 Post-Construction, Pre-Occupancy Baseline IAQ Testing which is a 4 hour test for 500 uG / m^3 or less of VOCs.

Magnetized & Radiation Contaminated Metals, Stone and Imported Products

ScanTech has been in the radiation survey business for over 10 years and is routinely called upon to investigate cases of suspected radioactive contamination and magnetized ferrous metals which can cause unusual issues. Our instrumentation includes several Geiger counters with capable of detecting Alpha and Beta particle emissions, X-Rays and includes specialized Gamma radiation scintillation detectors.

Weak Cell Phone Signal Reception Issues & Wireless LAN Problems / RFID Interference

Weak Cellular Phone (including 2G / 3G / 4G LTE) & Wireless Strength Measurements with consulting for correction / mitigation in commercial buildings, residential and multifamily properties with poor coverage, slow data rates and dropped calls for all major telecom and communications carriers including Sprint, T-Mobile, Verizon, AT&T for smartphones, tablets, iPads, etc. Radio Frequency Identification system troubleshooting and interference issues investigated. We also perform FCC RF Compliance surveys for MPE (Maximum Permissible Exposure) including rooftop antenna installations.

 

Hospital Infant Anti-Abduction Security Systems

ScanTech troubleshoots RFID integrated systems designed to protect neonatal care facilities that employ systems such as Hugs by Stanley Healthcare and MyChild by McRoberts Security Technologies.

Electrostatic Discharge (ESD) Testing, Consulting And Evaluation for Commercial, Industrial and Biomedical Companies / Applications / Clients

We have the equipment to determine the sheet resistance of ESD flooring material and if anti-static grounding is working as well as the ability to identify troublesome materials and processes which can cause equipment malfunction and electric shock / fire / explosion hazards. We can also measure relative air ion counts, humidity and the direct DC static voltage on surfaces (positive or negative) up to 30,000 V to determine which objects in the environment may be damaging your static sensitive equipment.

Indoor Air Quality (IAQ) Surveys to Determine Relative Air Cleanliness PM2.5 / PM10 / HEPA Filtration Efficiency / Formaldehyde / VOC / CO2 (Carbon Dioxide) / O2 Oxygen % Concentration & Contamination for Commercial Building and Industrial / Occupational Atmosphere Evaluations with expertise in Nanotoxicology and Medical Environmental Illness Testing

We have time based datalogging air laser analysis available to characterize particulate matter such as small particle contaminants (down to 0.5 microns such as bacteria) and large particle counts (2.5 um and larger) for potential pollen, dust and mold detection which are also known as RSPs. (Respirable Suspended Particles) We can also check for formaldehyde concentrations and VOCs (Volatile Organic Compounds) levels from outgassing materials such as pressed wood flooring or glues and other binders.

Elevated CO2 (carbon dioxide) levels are indicative of Sick Building Syndrome and poor air exchange characteristics in a structure.

New nanomaterials on the market have raised concerns about the potential toxic effects of nanoparticles (such as carbon nanotubes, titanium dioxide, silver NPs, etc.) in particulate, aerosol, aqueous forms and their in-vivo effects.

Commercial, industrial, occupational health and large scale residential applications.

http://www.indoorairqualitytestingdallas.com/

OSHA Sound / Noise Level Surveys for Safety Audits

Sound (Commercial) & Industrial Safety field surveys and measurement including for acoustic OSHA sound and STC (Sound Transmission Class) noise levels / ordinances / testing (meeting ANSI & IEC Type 2 standards) to determine compliance and evaluate potential issues with excessive or disruptive noise.

Photometric Glare & Illumination (Lighting Level) Surveys for Safety, OSHA and City Ordinance Compliance

Photometric mapping for Certificates of Occupancy, (CO) identifying poor / insufficient / excessive illumination, security camera glare, ATM lighting security assessments, ADA lighting requirements / compliance, and privacy. Many cities have enacted ordinances which limit the amount of light emanating at the property line at night in foot candles. (fc) We can also measure lighting flicker rates which can cause headaches and other performance issues as well as evaluate possible disruption of circadian rhythms which lead to insomnia and lack of restful REM sleep.

Metallurgical Analysis & Consulting

Materials analysis for ferrous / non-ferrous metals / alloys. Tools and tool steel quality evaluations for carbon content. Also magnetic / RF / electric shielding capability, corrosion resistance, heat resistance, degree of temper, quench methods, elasticity, weathering, and electrical quality consulting. Metamaterial composite research for nanotechnology, biomedical, and exotic applications. (graphene, nanoparticles, carbon nanotubes, nanodiamond, etc.) Radioactivity testing for scrap metal or other suspected products.

Dirty Electricity – Is it really “Electropollution” or a Real Threat to Health and Safety? The Dirtier Truth

Comparison of a "Clean" Powerline Signal (top) with one that has EMI or High Frequency Noise (bottom)

Comparison of a “Clean” Powerline Signal (top) with one that has EMI or High Frequency Noise (bottom)

“Dirty electricity” is a rather unscientific term used loosely to describe a signal waveform that has extraneous noise components riding on top of it – typically of higher frequencies and/or a transient random nature.

It is more accurate to describe it as a noisy signal or more specifically as 120 Volt 60 Hz AC with high frequency components. Incidentally, ScanTech Consulting has the capability to evaluate the amount of high frequency noise on a power line in the ranges of 10 KHz – 10 MHz in order to diagnose possible EMI and equipment interference issues. (see picture below)

The controversy is whether or not this phenomena has any measurable impact on human health and safety. Please notice that the use of the terms “dirty” and “electropollution”  have a negative connotation and will tend to immediately bias any reader. Also, the term “dirty electricity” and “electropollution” are not the same. Dirty electricity is any electromagnetic waveform that has unwanted and / or noticeable harmonics and regular or intermittent transients in either the voltage and / or the current component. Electropollution is another relatively unscientific term used by certain EMF consultants / specialists to describe potentially any and all electromagnetic waves of artificial origin, so dirty electricity is only a small subset of EMFs that could be included in the meaning of electropollution.

Bear in mind that there are a number of natural sources of electromagnetic noise such as the Schumann resonances, (spectral peaks in the Earth’s natural ELF field) and radio atmospheric signals which are known as “whistlers” and “sferics” (or also spelled “spherics”) which are produced by global lightning strikes that interact with the ionosphere and Earth’s magnetosphere.

Now before you think that I am completely dismissing the topic out of hand, I can tell you as an electrical engineering graduate that extraneous noise usually is a real problem, but it is normally far more so to equipment (particularly sensitive electronics) directly powered by it rather than to human health. I do have equipment designed to track this down, but this applies more to the commercial arena where (for example) anomalous equipment operation can be caused by a nearby defective (or poorly filtered) LED bulb or an arcing motor in some other part of the building.

Most power supplies are designed to filter out and/or minimize the potential damage that these noise spikes and transients can do before they reach the vulnerable logic components of your computer or charging cell phone. In addition, surge suppressors and UPS (uninterruptible power supplies) are an inline solution to prevent some of the larger transients such as those from a nearby lightning strike from doing something unpleasant such as zapping the motherboard of your PC.

Actual Scientific Measurement of High Frequency Electrical Noise on an AC Powerline

Actual Scientific Measurement of High Frequency Electrical Noise on an AC Powerline

They are also designed to filter out noise that may corrupt data such as on an Internet LAN cable or in critical medical and scientific equipment such as an EKG monitor or scanning electron microscope. But on occasion due to ground loops or incompatible equipment grouping, even the best power supplies can be thwarted if the data/signal lines themselves have corrupted information and / or spurious noise. In this case, you are looking for what is known as S/N or the signal to noise ratio.

So what about the effects to human beings? Does the electric noise on your 60 Hz AC mains actually cause any health problems?

I find it unlikely for several reasons. For one, the overall amplitude of the noise is typically much lower than that of the 120 V AC already on the lines – usually by an one to two orders of magnitude. (at least 10 – 100 times less) Then assuming you are not directly connected to the line (which would be a far more dangerous and immediate problem than any alleged long term health effects) you have to consider the electric near field that is present near any energized line with voltage.

The electric field “couples” or induces voltages in the human body with very poor energy transfer because the very high dielectric constant of water present in the body shields the internal tissues, cells and organs. The resulting induced internal voltages and current in the body from external fields are reduced by an order of 1,000,000 times less.

So even with an external electric field of 1000 Volts / per meter (V/m) the induced voltages inside a human would be on the order of 0.010 V/m (10 milliVolts) or less. This is much less than the typical voltages generated within the heart and brain which are from 1 – 10 V/m. Furthermore, the endogenous DC fields generated by the flow of ionic current through cells in the body is on the order of 10 – 100 V/m.

I find it hard to believe that a 10 milliVolt field could substantially perturb a system that routinely generates voltages that are 100 – 10000 times greater. Again, this is within a 1 KILOVOLT / per meter electric field which is much higher than you will see anywhere except inside of an industrial electric room or underneath a high tension line.

The electric field generated by the alleged dirty electricity has a greatly diminished amplitude – probably no more than 10 V/m. Divide that by the same attenuating factor of 10^6 (1 million) and you wind up with induced voltages of 0.0001 V/m which is in the microvolt range.  (100 microVolts) This is even more unlikely to cause any noticeable change inside the human body given the fact that the resting membrane potentials of most human cells range range from -40 to -80 millivolts which is at least 400 X to 800 X greater than the 100 microVolts cited. The negative numbers for the internal voltages of cells are stated as such because you are measuring the voltage with respect to the ECF (Extracellular Fluid) surrounding cells which is used as a ground reference.

And again, this is in a 1 kiloVolt / meter field. What you encounter routinely inside of a home is at most 100 V / meter or so, and more typically 1-10  V /m. So divide that 100 microVolts by 10, 100, and 1000 and you wind up with 0.1 – 10 uV (microVolts) being induced in the body which is hardly a drop in the bucket as far as electrochemical signaling in the body is concerned. There is probably a greater pathological effect from listening to Barney The Dinosaur than this minuscule amount of “dirty energy” injected into a human host.

Even if there are minor effects, the body is an organism with a renowned impetus and ability to maintain equilibrium under a range of conditions. This is why we usually don’t perish as soon as something affects our blood pH, body temperature, glucose levels, etc. Our bodies are constantly keeping up with an influx of stress, bad food, bacteria, substandard air and food quality and a plethora of other threats and chemical / genotoxic insults. We only become ill when a substantial imbalance develops that our system cannot compensate adequately for.

In addition, many of us already have DSL for high speed Internet access which runs routinely pulses high frequency signals through telephone lines and yet I never hear any fuss or concern expressed over this medium. Granted, the practice of using twisted pair conductors does prevent this “noise” from radiating any appreciable distance, but it is in the high frequency ranges that many claim are damaging when present on a power line. I find it interesting that certain so called “experts” seem to cherry pick what type of noise is clean or dirty.

At any rate, I do not claim that electromagnetic energy is COMPLETELY harmless, only that it is better to calmly examine actual data and put said risks into proper perspective.

But whether you are interested in “cleaning up dirty electricity” for either the benefit of your electronic equipment or because you are concerned about the safety risks to your health – I would strongly advise that you read this article concerning devices that claim to eliminate electrical noise / health risks and what the real effects are:

EMF – Harmonics, and questionable means to “clean” them

This is your friendly Dallas / Fort Worth / Houston / Austin EMF Testing Inspector signing off for now.

Stay Well!

SCANTECH EMF CONSULTING  214.912.4691