On the question of the Hum being either on or off. Consider the possibility of the individual having a threshold level, which acts something like a Schmitt trigger. If the Hum energy or the sensitivity of the individual goes above or below this level it would give the impression of the Hum being switched on and off. We must remember at all times that we are not the norm, over ninety per cent of the population do not hear this thing. For many people the Hum begins quite suddenly with a change of age and for a few people who had suffered for many years, it disappeared just as suddenly. I asked some of these sufferers to think very hard and make a note of any changes which took place in their homes or their locality or in themselves and the only answer that I got was that they had put on weight.
On Dec 20, 2:02 am, Vic <[email protected]> wrote: > Some that make recording attempts of these low-frequency sonic waves > probably succeed to some extent. However, from experience I, for one, > am aware that equipment is manufactured to only record sound that > occurs in the "normal" band of human hearing. Manufacturers are hardly > going to produce products that don't sell in the millions- Supply and > Demand - Particularly in our present "New World Order" where Chinese > factories are tailor-made to fit the multitude of consumers in the > West. > > To do the job right, you need the right tools.......... > > These successful (together with the unsuccessfulful) recorders make 2 > fatal mistakes: No reference frequency and playback speaker choice. > > I do not believe that and have proven that an expensive microphone is > not required. Mylar is quite satisfactory with a sampling frequency > rate of 44KHz. computer sound cards are ubiquitously "excellent" in > quality, their driver software likewise - They are universal (see > above 1st para). The universal calibration frequency is 400Hz > (remember the years-ago black and white TV's "Off The Air" picture and > accompanying 400Hz sound?), This is not a satisfactory frequency with > "Hum" - 440Hz, the ultra-stable note of A4 is required. Sound is a > logarithmic function of energy wave disturbance in the atmosphere. The > Octave function rather than the Frequency function is required. I > utilized the Fast Fourier Transform Technique to analyse the B0 and B1 > octaves coupled with AP Tuner, DC Live 7.5, and DSSF3 with success. > > 2nd. (apparent) failure reason: Normal speaker diaphragms simply lock- > up and are "glued" to the magnet at these low frequencies All that is > produced is a high frequency feedback sound. What you need is a > MASSIVE sub-woofer - That'll work! And I've done it. > > No one has to actually audibly playback "Hum" - After all, only a > certain few would hear it anyway. A "waterfall" graph could be used, > or Spectrograph, or, the previously merntioned FFT Power Spectrum > scan. Movement is a convincing measurement with humans; hence, I chose > the "waterfall" for my presentation of the "Hum", backed up by the > other 2 scans and IACC/Tau/Phi scans. "Hum" is a tough nut to crack, > ordinary nutcrackers don't work. There are tools out there that DO > work. I've attempted slowly introduce "Hum" ID and cracking and to > introduce these tools to the people on this forum who are unfortunate > enough to be able to hear this atrotious man-made anomaly. > > Try 'em, they work. Let's go get the darn culprits and put an end this > nightmare! > > On Dec 19, 11:12 am, Trev <[email protected]> wrote: > > > > > Maybe as the effects on the microphone are unknown, unless separately > > calibrated for? > > If professionals aren't sure- they will default to the known, least > > contentious position. > > With Hum already being a tricky problem, makes it worse- but one might > > infer some of these testers had a more biased lean, from what you say, > > John. > > A new pillow damping run needed...? > > > On Dec 17, 3:58 pm, "john dawes" <[email protected]> wrote: > > > > When people first begin to hear the Hum it is usually in the early hours > > > and the instinctive move is to cover one's head with a pillow, however, > > > as we all know this does nothing to stop the Hum. > > > > Over the years I have met many people who have attempted to record the > > > Hum . They have used all types of expensive recording machines and > > > microphones with impressive specifications, however, when I suggest that > > > the microphone should be covered with a pillow to remove extraneous noise > > > and allow only the Hum to pass through, they are strangely reluctant to > > > do so- 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.
