Advertisements
Advertisements
प्रश्न
What are ultrasonic?
एक पंक्ति में उत्तर
Advertisements
उत्तर
Ultrasonic are sounds having frequency higher that 20 KHz and not audible to the human being.
shaalaa.com
क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
APPEARS IN
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:
1000 Hz
What do you understand by the term infrasonic vibrations?
An electromagnetic wave has a time period of 4 × 10-8 s. Calculate its frequency in MHz.
What does SONAR stand for?
State the main components of a hearing aid.
Describe a simple method to find the depth of a submerged ship.
State the properties of ultrasound that make it useful.
The range of audible frequency for the human ear is
