Reply to post: Passive ultrasound absorption

When you play this song backwards, you can hear Satan. Play it forwards, and it hijacks Siri, Alexa

tony2heads

Passive ultrasound absorption

If I recall, some foam rubbers and some curtain materials absorb ultrasound. Can any confirm this?

If so wrap you home 'assistant' (alias spy device) in curtains.

POST COMMENT House rules

Not a member of The Register? Create a new account here.

  • Enter your comment

  • Add an icon

Anonymous cowards cannot choose their icon

Biting the hand that feeds IT © 1998–2019