Learn from our updated notes now. Aligned with 2021 board exam pattern. 1. Reflection of sound waves and echoes Like this Content? Share! Rate this Content 2.6 (52.31%) 13 votes 2. Free, Damped and Forced vibrations - Resonance Like this Content? Share! Rate this Content 4 (80%) 2 votes 3. Characteristics of Sound and Their Subjective and Objective Nature Like this Content? Share! Rate this Content 3.9 (77.14%) 7 votes Previous Chapter Next Chapterhttps://revision-content-dev.s3.amazonaws.com/eb196dbf-45c5-4157-b7c1-993f69f40342.pdf