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प्रश्न
What is echocardiography?
एक पंक्ति में उत्तर
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उत्तर
Echocardiography is used to obtain the image of the heart by the used of ultrasonic waves.
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संबंधित प्रश्न
A microphone is connected to the Y-input of a C.R.O Three different sounds are made in turn in front of the microphone. Their traces (a), (b) and (c) produces on the screen are shown in following figure.
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| (a) | (b) | (c) |
- Which trace is due to the loudest sound? Give reason for your answer.
- Which trace is due for the sound with the lowest pitch? Explain your answer.
Complete the following sentences:
An average person can hear sound of frequencies in the range ______ to _________.
Complete the following sentence:
Bats can produce and hear ___________ sound.
Name the sound of the frequency given below:
100 Hz
What is ultrasound?
What do you understand by the term sonic vibrations? State the range of sonic vibrations for the human ear.
What does SONAR stand for?
Does SONAR make use of infrasonic sound?
1 hertz is equal to
Ultrasound has frequency of vibration
