Certain low-frequency sounds can resonate with body organs and cause physical harm

Evidence

Some research even suggests that sound, and not even very loud sound, can kill on the spot. Low-frequency noise, such as that produced in large buildings by ventilation and heating ducts or wind effects, can match and resonate with the frequencies of our body cavities. Sounds with frequencies of eight cycles per second, for example, vibrate in time with the chambers of the heart, increasing the potential for thrombosis. Seven-cycle sounds trigger a harmonic with the brain’s 9 Hz alpha-wave frequencies, causing fatigue, headaches, and nausea. — George Michelsen Foy, Zero Decibels, 45

Sounds with frequencies of eight cycles per second, for example, vibrate in time with the chambers of the heart, increasing the potential for thrombosis. Seven-cycle sounds trigger a harmonic with the brain’s 9 Hz alpha-wave frequencies, causing fatigue, headaches, and nausea. — George Michelsen Foy, Zero Decibels, 45

Categorization

• corroborated: 3 independent passages support this claim — George Michelsen Foy, Zero Decibels: The Quest for Absolute…, 45
• XREF: connects to: Ordinary daily urban ambient noise levels correlate with heart disease risk — George Michelsen Foy, Zero Decibels: The Quest for Absolute…, 185; Sonic weapons cause severe physical harm and injury to civilian populations — George Michelsen Foy, Zero Decibels: The Quest for Absolute…, 420; Extreme near-total silence can trigger panic, disorientation, and physical illness — George Michelsen Foy, Zero Decibels: The Quest for Absolute…, 474 (+9 more)

Library Connections

• Modern militaries use directed extreme sound itself as a weapon against people #corroborates (0.88) — George Michelsen Foy, Zero Decibels, 415

Broader Connections

• Extreme urban noise can override a person’s own self-image and defenses #exemplifies (0.68) — George Michelsen Foy, Zero Decibels, 32
• Extreme near-total silence can trigger panic, disorientation, and physical illness #qualifies (0.65) — George Michelsen Foy, Zero Decibels, 474