Ultrasonic

Ultrasonic sound was sound at a frequency higher than human hearing. Other species could hear it, including Skarasens, (TV: Terror of the Zygons ^[+]Loading...["Terror of the Zygons (TV story)"]) Mandrels, (TV: Nightmare of Eden ^[+]Loading...["Nightmare of Eden (TV story)"]) Shrivenzales, (TV: The Ribos Operation ^[+]Loading...["The Ribos Operation (TV story)"]) Gorrillazons, (COMIC: Carnage Zoo ^[+]Loading...["Carnage Zoo (comic story)"]) the Apatosaurus-like creatures of Spekra (COMIC: Prisoners of Gritog ^[+]Loading...["Prisoners of Gritog (comic story)"]) and the dinosaur-like creatures of Quorus. (PROSE: Doctor Who Fights Masterplan "Q" ^[+]Loading...["Doctor Who Fights Masterplan \"Q\" (short story)"])

Zarbi communicated by making ultrasonic sounds. The First Doctor, calling it an "extra-sonic" sound, claimed that it was a kind which young people and young animals could hear, explaining why only Vicki Pallister could hear it. (TV: The Web Planet ^[+]Loading...["The Web Planet (TV story)"])

During an attempt to obtain a Krikoosh from a zoo, the Daleks set off an ultrasonic signal that drove the animals berserk. (COMIC: Carnage Zoo ^[+]Loading...["Carnage Zoo (comic story)"])

The disintegrator gun used an ultrasonic beam to disintegrate the target. (TV: Day of the Daleks ^[+]Loading...["Day of the Daleks (TV story)"])

The TARDIS had ultrasonic showers. (PROSE: The Empire of Glass ^[+]Loading...["The Empire of Glass (novel)"])