Further Experiments on Gravity Waves
As previously described, these experiments use a vibrator, a small mass attached to a flat spring in an attempt to mimic the cillia of the inner ear.
The mass weighed 0.25 grams and the steel spring had a width of 1.5 mm and a thickness of 0.1mm.
When the natural frequency of the vibrator is set close to 50 Hz a clear frequency beat can be observed, however, if the vibrator is made to oscillate at 25 Hz only a partial modulation takes place. At 16.66 Hz full modulation takes place but at 12.5 Hz only partial.
The general pattern being full modulation takes place at 50/n where n is an odd integer and partial modulation at 50/m where m is an even integer.
In a second experiment the vibrator described above was placed in a small recess at the bass of a stone retaining wall. The wall was 18 meters in height and 2 meters thick at the base. As no change was observed in the modulation of the vibrator it was concluded that the gravity waves pass through 18 meters of stone unaffected.
In a similar experiment the vibrator was placed inside a box constructed of 18 Kgms of lead and again no change in the modulation was observed.
These results agree with the recent reports from Germany where the Hum could be heard inside a specially constructed screened chamber and earlier reports that the Hum can be heard in caves and disused mines.
Just how far the gravity waves penetrate the Earth is at present a matter for speculation but it appears a method of screening the Hum now seems impossible.
The image
above shows the small mass attached to the end of the spring.
The spring is mounted on a steel block 2cm diameter and 2.5 cm in height.
The spring is clamped with screws to allow for frequency adjustment .
The vibrator can be seen standing upon a piezo transducer which will detect the modulation for display on an oscilloscope.