English Polarizable vacuum Cited by user GoingBatty on 05 Sep 2020 In theoretical physics, particularly fringe physics, polarizable vacuum (PV) and its associated theory refers to proposals by Harold Puthoff, Robert H.
English Acoustic metric Cited by user Bender235 on 06 Aug 2019 In mathematical physics, a metric describes the arrangement of relative distances within a surface or volume, usually measured by signals passing through the region …
Italian Buco nero acustico Cited by user Gigggino on 10 May 2019 Un buco nero acustico è un fenomeno in cui dei fononi (perturbazioni sonore) sono impossibilitati a fuggire da un fluido che sta fluendo più velocemente rispetto alla…
English Sonic black hole Cited by user AManWithNoPlan on 04 May 2019 A sonic black hole, sometimes called a dumb hole, is a phenomenon in which phonons (sound perturbations) are unable to escape from a fluid that is flowing more quickly…