[image: Model HVM100 Human Vibration Exposure & Product Compliance Testing] Applications - Product Compliance Testing - Human Vibration - Whole Body Vibration - Hand Tool Vibration - Vibration Severity Measurement - Hand-arm Vibration - Tooling Vibration - Worker Exposures - Industrial Hygiene - Assess Risk of Injury
Features - Frequency weightings and measurements for Hand-Arm and Whole Body Vibration - Conforms to ISO Standards 2631 and 5349 - Simultaneous 3-channel Measurements: X, Y and Z axes, plus Sum (S) - Lightweight and Portable - operates from two AA batteries or AC power supply - Records up to 200 hours of measurement time history - Programmable AC or DC Signal output - USB and Serial Interface to PC (115.2 kBaud) Literature & Support <http://www.larsondavis.com/contentStore/mktg/LD_Downloads/LD_HVM100_0309_Lowres.pdf> *HVM100 Datasheet (for compliance testing) >>* <http://www.larsondavis.com/contentStore/mktg/LD_Downloads/LD_HVM100_0309_Lowres.pdf> <http://www.larsondavis.com/contentStore/mktg/LD_Downloads/LD_HVM100_IHV_0309_Lowres.pdf> *HVM100 Datasheet (For Industrial Hygiene applications) >>* <http://www.larsondavis.com/contentStore/mktg/LD_Downloads/LD_HVM100_IHV_0309_Lowres.pdf> <http://www.larsondavis.com/contentStore/mktg/LD_Downloads/LD_HVM100_IHV_0309_Lowres.pdf> *HVM100 Configuration Guide >>* <http://www.larsondavis.com/contentStore/mktg/LD_Docs/HVM100_Configuration_Guide.pdf> <http://www.larsondavis.com/Support/HumanVibrationSupport/HVM100.aspx> *HVM100 Support Page >>* <http://www.larsondavis.com/LinkClick.aspx?link=1489&tabid=1455&portalid=7&mid=2162> <http://www.larsondavis.com/TotalCustomerSatisfaction> <http://www.larsondavis.com/LinkClick.aspx?link=1482&tabid=1455&portalid=7&mid=2162> Human Vibration Exposure The Human Vibration Monitor 100 is a hand-held instrument for measuring human exposure to vibration, performing relevant calculations and providing overall metrics on its LCD display. Detailed vibration levels are easily stored in its built-in data logger, which can hold up to 100 separate time-history test files including all required metrics. This information can then be downloaded to a PC for analysis and archiving. *Product Compliance Testing* Measuring all three axes of vibration simultaneously greatly simplifies the setup of a test and enhances the repeatability and correlation of the vibration data. From the three channels of measured data, the HVM100 automatically calculates the important vector sum information and presents it as a fourth set of data values. For compliance with the latest measurement standards, the HVM100 employs digital filters for each channel that can be enabled as needed, and will never be obsolete - should standards change, the filters can upgraded - electronically! *Measuring Human Vibration* Human vibration in the workplace can be created by the operation of tools, plant machinery, and various vehicles. Different parts of the human body have resonances and, as you would expect, vibration at a resonant frequency is especially disturbing. As the transmissibility of vibration to an operator increases in amplitude or duration, it can cause annoyance, fatigue, and at higher exposures, a risk of injury. Human vibration in the workplace is categorized in two ways: 1. Whole-body vibration (WBV) where transmission is from the source through the feet or the buttock and into the body. 2. Hand-arm vibration (HAV) where transmission is through the hands and arms when using vibrating tools. The Larson Davis Human Vibration Meter (HVM100) is well suited for measuring whole-body and hand-arm vibration. It will analyze the data in accordance with the most current ISO requirements to calculate exposure metrics. The HVM100 is used with a miniature accelerometer that can be mounted using various handle adapters or a seatpad accelerometer. Using the Larson Davis Blaze® software, the operator can gather, manage, graph, and report the vibration exposure data. Rapid, constant, leg twitching, is a whole body pathology vibration, Vibroacoustic disease, I used a HVM100 type 1 Human vibration meter in My home on Myself 2.8 Meters squared daily active value. 5 times over safe limits. If its twitching inside our legs like that then what do you think its doing to SIDS, still births, miscarriage Babies, Alzheimer's, Autism, Infrasound is a destroyer of IQ's, and I first notice the twitching in My legs in grade school, over 45 years ago..., it's been Harmful to Me for years, ALCOA's long range deadly infrasound was in my south colton home during child hood making Me less intelligent so I couldn't grow up to a the standards and potential I could have reached ! Deadly long range Infrasound created by Extremely Heavy Industry ALCOA, needs Justice for the People and Babies killed ALCOA's long range infrasound ! Just imagine Your a Stage III Vibroacoustic disease malignancy Cancer Child about to DIE ? Health and Safety official's need to be Indicted by a grand Jury along with ALCOA for years of SIDS, Suicides and other Murder Homicides ! My legs awaken Me at 3:00 am 8/9/2014 ! Not Checking for Deadly infrasound around ALCOA Primary Metals Massena West Smelter is and intentional disregard for Community Health and Safety *http://www.ncbi.nlm.nih.gov/pubmed/17014895* <http://www.ncbi.nlm.nih.gov/pubmed/17014895> This is an agent of disease ! whole body pathology vibration. *http://able2know.org/topic/114246* <http://l.facebook.com/l.php?u=http%3A%2F%2Fable2know.org%2Ftopic%2F114246&h=NAQHCPmMNAQEK2Xi7IIHY-PyzV53maiMS4Ef2vFJNN1w3Pg&s=1>- Infrasound. On Sunday, June 30, 2013 6:32:41 AM UTC-4, Francis Connell wrote: > I have been experiencing the hum in SE Ohio for almost 2 years now. The > intensity changes from bearable to unbearable. I was fortunate to have > phone conversations with Dave Stetzer, and Mike Martin, two men who work in > areas that have been related to the hum. Mr. Martin teaches workshops to > Utility workers to help them identify and resolve customer noise > complaints, so I contacted him to ask if it was viable for me to take his > workshop (with minimal engineering experience) to determine a means of > recording/identifying the hum. I may have stated all this in previous posts > but the following is a synopsis of what seems to have helped me 'bear' this > noise pollution. > I purchased an HF 35C from 'Gigahertz Solutions' which analyzes HF signals > from 800 MHz - 2500 MHz, after watching a video on YouTube of a user > showing the spikes coming from a new 'smart meter'. > I explained to Mr. Martin that the Hum seemed to be worse at my home, and > I did not experience it when I was out in town or on job sites, so I > thought it was geographical, or related to my home environment where a > 3phase power line extends along the back of my property about 40 feet from > the back of my house, and a cell phone tower looms another 3,000 feet > behind that. Mr. Martin likens this exposure to elevated freq. levels to > standing in the sun for 8 hours then taking a lukewarm shower. The water > will feel hotter since our skin has been over-exposed and sensitized. In > the same way, constant exposure to low level frequencies over sensitizes > our bodies bio-electrically and we experience the hum. An explanation of > why I hear it at home was that we get accustomed to our audible > environment. We unconsciously 'know' the sounds of our home. We can tell > when we hear a car if it is in our driveway or a neighbors. We know our > dog's different barks, etc, and so, are more tuned in the sounds in our own > environment. I do hear the hum when I sleep other places, but only when the > ambient sounds there are very low, and then it always more distant. I > suspect if I stayed in an alternative space long enough I would hear it > more vividly, but I pray I can find a place where that is not the case. > > Mr. Stetzer spoke about Stray or Orphan voltage, specifically related to > SMPS (Switching mode Power supply). The difference (related to Lidia's > reference to AC/DC converters) is that CFLs, and all DC chargers (cell > phones, computers, etc) are not linear power. A standard incandescent light > bulb is an example of linear power. The power comes into the lamp, crosses > the filament and goes back out. The frequency analysis on a chart would be > smooth loops up and down at 60 hz. With an SMPS the loops are jagged since > ballasts and other devices are interrupting the smooth flow of the freq. > According to Mr. Stetzer stray voltage escapes the wiring in our homes, > thus exposing us to elevated levels of EMF radiation. The book "Dirty > Electricity" addresses this issue as well in relation to cancer clusters at > a school in California. > > I made some changes in my home while investigating the freq. output of my > home wireless internet router which was suggested as a cause of elevated > exposure. Using the HF 35C, I first turned off, then disconnected, and then > unplugged my router, but was still reading a maximum spike on my analyzer, > then suddenly realized my 'cordless phone' base was on the shelf right > below the router. I unplugged the phone and the readings dropped from over > 2,000 microwatts/cm sq to 3. I read more about these bases putting off > frequencies 24/7, and how many people sleep with the phone right beside the > bed. I switched to the old style phone, plugged into the wall; I hard wired > my router and purchased a modem that has a switch to turn the wireless > function 'off'. I replaced all the CFLs which has become the predominant > light source (since they purportedly 'save' us so much on our electric > bills), with incandescent and LEDs, and eliminated some wiring in the wall > to the receptacle directly above my bed. > I still hear the hum, but it is more a distant nuisance than a constant > tasing. > I do not know if this slight relief is psychological, since I have no > knowledge on how to analyze frequencies to see just how different they may > be in an environment with and without the above mentioned devices. > I am moving to a new property over the next year where I intend to build a > structure without rebar, or any electrical wiring, as it was also suggested > the wiring in our walls, being a conductor, acts as an antenna for RFs and > EMFs(this was also illustrated by a guy who did an experiment with HomePlug > and how he was able to pick up a wireless signal on his computer through a > string of Christmas lights). Analog television in our area also changed to > Digital about the same time I started hearing the hum thus increasing the > EMF saturation that is enveloping our planet. > I apologize if all this seems 'trite', or if I have mis-represented > anyone's opinion. > > On Thursday, June 6, 2013 7:48:10 PM UTC-4, Luca Rizzardi wrote: >> >> Hello. >> I'm Luca, a sound engineer from Italy. >> I am not a hummer, but I spent the last 9 months studying The Hum, with >> the assistance of my university advisor and two hummers of the area. >> I studied a lot of the theories and publications about the phenomenon (in >> particular those of Chris Barnes and Tom Moir), analyzed testimonies and >> data from different forums like this and The World Hum Map and Database, >> studied the behavior of the phenomenon and formulated my hypothesis. >> Finally I have successfully recorded The Hum. >> >> On this link <http://www.youtube.com/watch?v=MhNCdzA6Fmc> you can listen >> to my recording and see the spectrogram. >> Frequency of the noise is around 30 Hz. >> >> This is my thesis >> <http://www.scribd.com/doc/144697878/Luca-Rizzardi-Conservatorio-C-pollini-Padova-The-Hum>, >> >> unfortunately in Italian language. >> I would be happy to exchange some opinions with you. >> >> Luca Rizzardi >> >> >> >> >> -- You received this message because you are subscribed to the Google Groups "Hum Sufferers" group. 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