reply to post by notknowing
This is a good description of the hum: from homepages.tesco.net...
The Hum-----A Description
The Hum has a very distinctive sound that is instantly recognised by Hum sufferers around the world. It is often described as the sound of a diesel
engine idling some distance away, or the drone of a distant propeller driven aircraft which never comes nearer or goes away.
The intensity of the Hum can vary greatly but it is usually at its most intense during the early hours, around 3-4am local time and at weekends.
The Hum is invariably much greater indoors than outside, also greater upstairs, in small rooms, passageways and stairwells.
The Hum can also be "heard" in a stationary car with the engine switched off.
The use of sound proofing, ear-plugs or ear protectors are ineffective, in fact, by eliminating extraneous noise, these only serve to intensify the
perceived Hum level.
The Hum is very selective, approximately 5% of the population "hear" the noise, almost all are aged 50 or over, and 70% of these are women.
The physical effects which accompany the Hum vary both in type and intensity and depend a great deal on the individual.
The most common effects reported are:
* Insomnia * Difficulty concentrating * Headache * Burning Skin
* Nausea * Fatigue * Tension * Pins and Needles
* Muscle Spasms * Heart Palpitations * Eye Strain * Ear Pressure
If you find that in the household you are the only one that can "hear" the noise and it always decreases when you go outdoors, than it is a pretty
safe bet that you are affected by the Hum.