R Ram Sharma 🎓 Coach ⭐ 193.88K Points 📊 Physics Q. Sound of frequency below 20 Hz are called (A) Supersonics (B) Ultrasonics (C) Infrasonics (D) Audio sounds 👁️ Show Answer 🔗 Share ⚡Menu ✅ Correct Answer: (C) Infrasonics You must be Logged in to update hint/solution 💬 Discussion 💬 Comment