Science · Physics
पराश्रव्य ध्वनियाँ (अल्ट्रासोनिक तरंगें) वे हैं जिनकी आवृत्ति होती है:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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20,000 हर्ट्ज से अधिक
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