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प्रश्न
What is ultrasound?
एक पंक्ति में उत्तर
उत्तर
Sounds of frequency above 20 kHz are called ultrasound.
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संबंधित प्रश्न
The sketches I to IV in following Figure show sound waves, all formed in the same time interval.
 |
 |
| I | II |
 |
 |
| III | IV |
Which diagram shows
- a note from a musical instrument
- a soft (or feeble) note,
- a bass (low frequency) note.
Complete the following sentence:
Ultrasound is of frequency ___________.
Name the sound of the frequency given below:
10 Hz
Explain how do bats locate the obstacles and prey in their way.
What do you understand by the term infrasonic vibrations?
Name three animals which can hear ultrasonic vibrations.
What are ultrasonic? State and explain two applications of ultrasounds.
What does SONAR stand for? Where do we make use of SONAR?
Ultrasound has frequency of vibration
Bats produce ______ sound during screaming.
