From SciTechDaily: "That Haunted Feeling May Be Caused by a Sound You Can’t Hear." From the article:
People exposed to infrasound may not consciously hear it, but they can show higher cortisol levels and increased irritability, which may help explain reports of “haunted” locations.
Infrasound refers to sound at very low frequencies, below 20 Hertz (Hz), a range that people usually cannot hear. ... In a new study of whether people can sense infrasound, scientists found that although humans do not consciously detect it, their bodies still react, with exposure linked to greater irritability and higher cortisol levels.
“Infrasound is pervasive in everyday environments, appearing near ventilation systems, traffic, and industrial machinery,” said Prof. Rodney Schmaltz of MacEwan University, senior author of the article in Frontiers in Behavioral Neuroscience. “Many people are exposed to it without knowing it. Our findings suggest that even a brief exposure may shift mood and raise cortisol, which highlights the importance of understanding how infrasound affects people in real-world settings.
“Consider visiting a supposedly haunted building. Your mood shifts, you feel agitated, but you can’t see or hear anything unusual. In an old building, there is a good chance that infrasound is present, particularly in basements where aging pipes and ventilation systems produce low-frequency vibrations. If you were told the building was haunted, you might attribute that agitation to something supernatural. In reality, you may simply have been exposed to infrasound.”
This is not something new. A January 2026 article in the Chinese Journal of Traumatology, entitled "Injury of sonic weapons to human body: A narrative review," relates in regard to infrasonic weapons (footnotes omitted):
Currently, there are 3 types of sonic weapons: sonic cannons, sonic bullets, and sonic guns, all composed of sonic generators, power devices, and control systems. The Chinese Academy of Sciences has developed a sonic gun with a frequency less than 20 Hz. The SPL of sonic guns developed by the United States (U.S.) and France can reach 160 dB. Infrasonic weapons can be classified into 5 categories based on their generation methods: (1) burst-type: compressed gas, high-pressure steam, or high-pressure gas is released in a pulse to excite the medium and generate sonic waves, with the advantages of small size, low frequency, and easy control, but with low sonic intensity and short range of effect; (2) explosive-type: infrasonic waves are generated by explosions, and about 50% explosive energy converts shockwaves, then decay to produce infrasonic waves; (3) tube-type: its structure and working principle are similar to a flute. Infrasonic waves are generated when the air inside the tube vibrates at the same frequency as the tube itself; (4) speaker-type: the working principle is similar to a speaker. Special diaphragms are used to generate infrasonic waves through vibration; (5) beat frequency-type: 2 sound wave generators with different frequencies are used simultaneously to generate infrasonic waves based on the difference in their frequencies. Compared to intense sound weapons, the development of infrasonic weapons is more challenging, due to the technical difficulties such as it is hard to increase the power output and duration of the infrasonic generator, to reduce the size and weight of the weapon system, to make wave beam more directional and focused.
The US has secretly used infrasonic weapons in the Somali, the Bosnian, and the Gulf War. It is reported that infrasound attacks on the Bosnian Serb Army caused a large number of soldiers to faint and vomit within seconds, resulting in the loss of combat effectiveness. The US also suspects that its embassy personnel in Havana (Cuba) and Guangzhou (China) have been attacked by infrasonic weapons.
And, as we now know, U.S. intelligence was actually able to procure such a weapon.
No comments:
Post a Comment