An Alarm Designer on How to Annoy People in the Most Effective Ways
The most distressing sound I know is the Shepard–Risset glissando, also known as the Barber-pole sound because it seems to continuously drop in frequency. Wikipedia has an audio sample [1].<p>[1] <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Shepard_tone" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Shepard_tone</a>