Quizerland Quizerland Back
Waves & Sound
CAN YOU ANSWER?
Question

Ultrasound refers to frequencies?

A Below 20 Hz
B Exactly 20 Hz
C Visible light frequencies
D Above ~20 kHz
Shahzad Mahota
Shahzad Mahota @shahzad-mahota · Waves & Sound
Tue · Oct 13, 2026 quizzez.qaydum.com

Share this question

Download a poster with the question and options — no score, just the challenge.

Download poster
Link copied