Thanks to this embodiment of the sound generator, it is able to operate in the infrasonic frequency range up to 25 Hz. The resonator tube and the diffuser are dimensioned for the desired frequency and power as described above. Infrasound is sound that is lower in frequency than 20 Hz (Hertz) or cycles per second, the "normal" limit of human hearing.

Use of conventional loudspeaker technology in an array has demonstrated the ability to project acoustic signals down to frequencies of 8 Hz ( Walker et al. the resonator tube is resiliently suspended in the tunnel by means of an annular diaphragm 17 of steel sheet, which has a thickness of some millimeters and is sealingly mounted at the outer end of the tunnel, the diaphragm being connected at the outer periphery thereof to the tunnel and at the inner periphery thereof to the resonator tube.

Here’s a brief description – I’ve written this summary several years later, from memory, on request from various correspondents so please excuse any details that are missing. Or simply, do you want to generate sounds and listen to the generated sounds in different frequencies? Now once you have tested and solder together your cabling install l all the cabling, solder the speakers, cut holes to the exact size of the speakon jacks + corresponding panel. High vibrational frequencies stimulate the third eye, which is essential for mediumship and relies on high vibrational energy. The generated infrasound vibrations produce serious impact over these poor herbivorous animals – they freeze with fear and are just not able to move an inch.

We were working on a very tight budget so our acoustic canon was made from stiff sewer pipe around 7 metres long. The resonator tube and the diaphragm form a resilien system which has a natural frequency that should be considerably higher than the frequency of the sound generator such that a fraction only of the mass forces from the vibrations of the resonator tube is propagated to the boiler via the tunnel. However frequencies below 50 Hz especially around 15 Hz are found to be quite unique and intriguing with their features. However, the sound pressure is at maximum at the closed end " of the resonator tube and decreases with increasing distance from the closed end. Through collaboration with two leading companies in the field of fibre weaving and composite design, a new fabric was invented to achieve what was previously impossible.

Many have tried to overcome the practical difficulties of building a pure infrasound generator by creating an infrasonic ‘resultant bass’. The technical result of the invention is the exclusion from the design of devices such as a vacuum pump, a rotary unit, and a complex system for supplying air flow through the use of a design containing the above elements. Alternatively, if this is not possible, you can download and save a 10 second WAV file that can be played at any time and is universally compatible with all browsers and software.