seismic hydroacoustic infrasound
1Infrasound — is sound with a frequency too low to be heard by the human ear. The study of such sound waves is sometimes referred to as infrasonics, covering sounds beneath the lowest limits of human hearing (20 hertz) down to 0.001 hertz. This frequency range …
2SHI — School Health Index (Community » Educational) Student Health Insurance (Academic & Science » Universities) Student Health Insurance (Community » Educational) * Sustainable Harvest International (Community » Non Profit Organizations) * Stolen… …
3Comprehensive Nuclear-Test-Ban Treaty Organization Preparatory Commission — Preparatory Commission for the Comprehensive Nuclear Test Ban Treaty Organization CTBTO Preparatory Commission logo …
4Underground nuclear testing — Preparation for an underground nuclear test at the Nevada Test Site in the 1990s. Nuclear weapons …
