What is the frequency range of ultrasound?

Correct option is D

The correct answer is (d) Above 20 kHz.
· Ultrasound refers to sound waves with a frequency higher than 20,000 Hz (20 kHz), which is beyond the upper limit of human hearing.
· These high-frequency sound waves are used in various applications, such as medical imaging (ultrasound scans), industrial non-destructive testing, and sonar.
· Ultrasound waves can travel through different media, making them useful for examining the internal structures of the human body and detecting flaws in materials.
Information Booster:
· Ultrasound: Sound waves with frequencies above 20 kHz, inaudible to the human ear.
· Applications: Used in medical diagnostics (ultrasound scans), cleaning, and material testing.
· Human Hearing Range: Typically between 20 Hz and 20 kHz.
· Sonar Technology: Utilizes ultrasound to detect objects underwater.
· Medical Use: Widely used in pregnancy imaging and diagnostic assessments for internal organs.