A. Audiosonic B. Infrasonic
C. Ultrasonic
D. Supersonic
Submitted by: Fahad Mehsud
Sounds with frequencies below 20 hertz are called infrasound. Infrasound is too low-pitched for humans to hear. Sounds with frequencies above 20,000 hertz are called ultrasound.
Everyday Science Mcqs. Here you will find the General Science Multiple Choice Questions Mcqs are from Biology, Chemistry, Physics and Atmospheric Studies. Everyday Science Online Test 2 Mcqs Preparation Practice Questions. All Important Abbreviation related to Everyday Science in MCQs. General Science mcqs and Scientific facts MCQs. Everyday Science MCQs with Answers.