Physics
Grade-6
Easy
Question
Sound with 25000 HHz frequency is called _______.
-
Ultrasound
- Infrasound
- Audible sound
- None of these
Hint:
-
The audible frequency range for human ear is from 20Hz to 20000Hz , waves having frequency above 20000Hz , are called ultrasonic and below 20Hz , they are called infrasonic .
The audible frequency range for human ear is from 20Hz to 20000Hz , waves having frequency above 20000Hz , are called ultrasonic and below 20Hz , they are called infrasonic .
The correct answer is: Ultrasound
-
The audible frequency range for human ear is from 20Hz to 20000Hz , waves having frequency above 20000Hz , are called ultrasonic and below 20Hz , they are called infrasonic .
- So sound with frequency 25000Hz is called Ultrasounds
The audible frequency range for human ear is from 20Hz to 20000Hz , waves having frequency above 20000Hz , are called ultrasonic and below 20Hz , they are called infrasonic .
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