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InFacts about India-02 November 2023
🇮🇳 FACTS ABOUT INDIA🇮🇳 ========================== 😳WHY❓❓❓ Why can’t we hear ultrasound? The human ear has a perceived frequency range of 20 Hertz to 20 kHz. Any frequency below 20 Hz is classified as infrasound and any frequency above 20 kHz Read more