Our HUM and as I suspect most, the HUM is louder inside the house and also inside of a parked car (use as a mobile lab). I will tell you thou,that about a year ago I was golfing near a soon to be found HUM suffer in North Carolina- PineHurst Area, and hearing the HUM distinctively outside- different than up home. NO GASLINES to blame it on. But guess what, there is a major high pressure Liquid Propane line that runs near that golf course and that persons home. They have high pressure pumps located nearby. So, in my mind, the HUM I heard and is still heard by the North Carolina suffer needs to be part of an over all investigation into these lines.
On Jun 15, 7:13 pm, dboots <[email protected]> wrote: > well 98.5 hertz is .0000985 MHz but I don't know any frequency band > that transmits in that low of a range so I would imagine it has to be > converted into some other function > of sound waveforms > > hertz doesn't break down into decibels and sound pressure is > measured in > decibels.http://www.answers.com/topic/decibel > > Although decibel is a relative scale, it is often expressed as though > it were absolute, with an implied reference signal. For sound, using > the distinguishing label dBA but often just as dB, the reference is > usually the threshold of human audibility, taken as sound of an > amplitude (pressure) of 20 ìPa and a frequency of 1 kHz. > > If either low or high frequencies are attenuated, giving emphasis to > mid-range frequencies and beyond, the labels dBB and dBC, > respectively, are used. (Such selective attenuation provides measures > corresponding better to human sensitivities, with comparable readings > for sounds of different pitches sensed by the ear as equally loud.) In > electric communication circuits, dBW is relative to a signal of power > of 1 watt, dBm to a power of 1 mW (hence 0 dBm = -30 dBW). > > Can the attenutation be broken down of comparative to wireless power > in some fashion?http://en.wikipedia.org/wiki/File:Attenuation.jpg > > electricity) The exponential decrease with distance in the amplitude > of an electrical signal traveling along a very long uniform > transmission line, due to conductor and dielectric losses. > > (physics) The reduction in level of a quantity, such as the intensity > of a wave, over an interval of a variable, such as the distance from a > source.http://www.answers.com/topic/attenuation > > Hey I am just a layperson trying to figure it out as I go along. > But what I am finding is dBW amd dBm (watts and miliwatts) is a piece > of the puzzle as it has to do with signals of gains and losses of > satellite transmissions converting into MHz and GHz > and also now terahertz > > Yes it would seem it is not relative to the electrical grid but what > about a wireless > grid as a main frequency in some manner??? > > Like I said I am just a layperson, but for this thing to be humming > around the world, > I am leaning towards the modern of the functions of the wireless > advancements > being a piece of the puzzle of a bow string vibrating/conduction and > EMF has to be > in this somewhere > > On Jun 15, 4:27 am, Frank <[email protected]> wrote: > > > > > I recorded the sound using a small laptop with its internal > > microphone. > > I then used Spectrum Lab to analyse the recorded file. > > The frequency is a very stable 98.5Hz so unless I have made a mistake > > here, it is not related to mains frequency. > > I have been running Spectrum Lab for several days to see if it > > switches off at any particular time but its been on solid for the last > > 3 days. > > > I really need to make a recording with less noise. I have a > > measurement microphone for my loudspeaker measurements but its not > > portable enough and needs "phantom" power. > > > Frank > > > On Jun 15, 6:12 am, dboots <[email protected]> wrote: > > > > Hi Frank > > > > some form of sound density pressure wave forms seem to be a running > > > theme > > > > What kind of microphone did you use? > > > Does the software give any idea what band of the spectrum the > > > frequency is in??? > > > Does the software give any idea if it is a low frequency MHz of a > > > characteristic??? > > > > Interesting your description if you walk in the direction of the Hum > > > it disappears > > > > Dee > > > No Calif > > > > On Jun 14, 2:03 am, Frank <[email protected]> wrote: > > > > > I am currently investigating my hum in the southwest of England. > > > > I can confirm that this one is an acoustic pressure wave (sound) and > > > > not something esoteric. > > > > I have been able to detect it using a microphone and view it using a > > > > PC with audio spectrum analyser software. > > > > > Its characteristics are: > > > > It is louder outside the house than inside. > > > > It is louder at the front of the house. > > > > My Wife can also hear it. > > > > It is constant level but switches off abruptly as I have heard several > > > > times. > > > > > Hearing is not so good at direction at such frequencies but if I walk > > > > in the the direction that the hum "seems" to be coming from, it > > > > disappears. > > > > The level is highest just outside the front of my house! > > > > There is no industry within the immediate area so its source still > > > > remains a mystery. > > > > > Frank > > > > > On May 5, 12:23 am, Jim <[email protected]> wrote: > > > > > > Steve, > > > > > I live in East Aurora,NY > > > > > > Jim > > > > > > On May 4, 9:30 am, Steve K <[email protected]> wrote: > > > > > > > Sorry to hear you have had it so long. we started hearing it in > > > > > > western CT around Sept 2009. Our proofing looks top be changes in > > > > > > natural gas distribution operations in our case. The theory is this > > > > > > is a national problem, having been occurring for years some places > > > > > > and > > > > > > accelerating in the last 4 yers to other areas. Where do you hear > > > > > > teh > > > > > > HUM- town and stte is good enough > > > > > > > Steve > > > > > > > On May 4, 8:11 am, Jim <[email protected]> wrote: > > > > > > > > My name is Jim and I am 64 years old. I have been hearing a low > > > > > > > humming for 20 years now. I can't say that it is annoying as I am > > > > > > > quite used to it by now. The best way to describe it is: a > > > > > > > soft,low,hum that sounds like a hot air forced furnace when it is > > > > > > > running or a distant train going down the tracks. Oddly enough, > > > > > > > when I > > > > > > > really notice the hum is when it turns off. Being on so often, the > > > > > > > quiet of not hearing the hum is unusual. I could never hear the > > > > > > > hum go > > > > > > > on but I sometimes hear it switch itself off during the night > > > > > > > while > > > > > > > laying in bed. My wife thinks I'm nuts.... > > > > > > > > Jim- Hide quoted text - > > > > > - Show quoted text -- Hide quoted text - > > > - Show quoted text -- Hide quoted text - > > - Show quoted text - -- You received this message because you are subscribed to the Google Groups "Hum Sufferers" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/hum-sufferers?hl=en.
