Скачать или смотреть Sound – Part 3 | Reflection of Sound, Range of Hearing & Ultrasound | Class 9 Physics

Sound – Part 3 | Reflection of Sound, Range of Hearing & Ultrasound | Class 9 Physics

In this lecture, we continue Sound – Chapter 11 with Part 3, where you will clearly understand:
🔹 Introduction 00:00
🔹 Reflection of Sound 00:15
🔹why sound reflects ? 02:48
🔹 Echo and its conditions 4:25
🔹 Reverberation 08:44
🔹 Numericals 10:54
🔹 Uses of multiple reflection 14:23
🔹 Range of Hearing (Infrasonic, Audible & Ultrasonic sounds) 16:29
🔹 Ultrasound and its application 19:38
🔹 Hearing Aid 22:27
🔹 Conclusion 23:27

All concepts are explained in a simple, exam-oriented and NCERT-aligned manner, especially for Class 9 Physics students.

This lecture will help you:
✅ Build strong conceptual clarity
✅ Understand diagrams and applications
✅ Prepare confidently for school exams

📚 Watch the complete Sound chapter playlist:

👉    • Sound Class 9 Complete Series  

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