I have been asked this question and the following are my thoughts.
In Freemasonry generations have inherited veiled teachings and practices and have not penetrated the veilings. Having not penetrated the veilings those brethren, knowing that secrecy is required, protect the outer form.
In a sense this is no bad thing. Those brethren that do discover some of the hidden mysteries of nature and science will have had practice at secrecy.
Meanwhile, browsing the web for secret sciences will give a number of clues about what is in the military domain already. Here is one entry to the rabbit hole.
Still, having pursued such matters for some decades I am of the view that the practice of etheric sciences is primarily based on right relationship with Nature combined with right understanding of the structure of Reality.
Ultimately, natural humans do not need technology. Nature cooperates with those that it treasures.
In the 1960s the US lost their ambassador in Moscow to low intensity microwave radiation and his replacement got very sick too. The microwaves were focused on the ambassador's office.
"Senior state department officials who announced the decision said it was still not clear who was responsible for the “targeted attacks” which have caused injuries including various permanent hearing loss, brain injuries, dizziness, tinnitus, problems with balance, visual impairment, headaches, fatigue, cognitive issues and difficulties sleeping.....In some cases, the effects were narrowly confined, with victims able to walk “in” and “out” of blaring noises audible in only certain rooms or parts of rooms"