ultrasonic
/ˌʌltrəˈsɒnɪk/adjective
उच्चारण अल्ट्रसॉनिक
पराश्रव्य
Advanced word
adjective
- 1
physics
(of sounds) higher than humans can hear, that is above about 20,000 hertz
पराश्रव्य
- Bats use ultrasonic sounds to find their way in the dark.
- Ultrasonic waves are used to clean jewellery and to detect cracks in metal.
◇Word family
ultrasound noun
?Which word?
Do not confuse ultrasonic sound (above 20,000 hertz) and infrasonic sound (below 20 hertz).
Ultrasonic ध्वनि (20,000 hertz से ऊपर) और infrasonic ध्वनि (20 hertz से नीचे) में भ्रम न करें।