Ultrasonic

Ultrasonic sound was sound at a frequency higher than human hearing. Other species could hear it, including Skarasens, (TV: ) Mandrels, (TV: ) Shrivenzales, (TV: ) Gorrillazons, (COMIC: ) the Apatosaurus-like creatures of Spekra (COMIC: ) and the dinosaur-like creatures of Quorus. (PROSE: )
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: )
During an attempt to obtain a Krikoosh from a zoo, the Daleks set off an ultrasonic signal that drove the animals berserk. (COMIC: )
The disintegrator gun used an ultrasonic beam to disintegrate the target. (TV: )
The TARDIS had ultrasonic showers. (PROSE: )
Category:Physics from the real world
Category:Sound