Sound corresponding to which frequency is ultrasonic sound? |
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(a) |
30 Hz |
(b) |
300 Hz |
(c) |
3000 Hz |
(d) |
|
Sound corresponding to which frequency is ultrasonic sound? |
|||||||
(a) |
30 Hz |
(b) |
300 Hz |
(c) |
3000 Hz |
(d) |
|