Sound

This topic covers concepts such as Production of Wave and Sound by Tuning Fork, Disturbance or Pulse, Pleasant Sound, Unpleasant sound, Sources of Sound, etc.

This topic covers concepts such as Time Period, Frequency, Amplitude, etc.

This topic covers concepts such as Propagation of Sound in Solids, Sound Propagates through Liquids, Sound Propagates through Gases, Suction, etc.

This topic covers concepts such as Infrasonic Sound, Ultrasonic Sound, Human Ear, Parts of Human Ear, Outer Ear, Inner Ear, Structure of Human Ear, Audible Range of Frequencies for Humans, Inaudible Range of Frequencies for Humans, Uses of Ultrasonic Sound, etc.

This topic covers concepts such as Laws for Reflection of Sound, Echo, Echoing of Voice in Mountains, Reflection of Sound, Good Reflector of Sound, Good Absorber of Sound, Conditions Necessary for Hearing Echo, etc.

This topic covers concepts such as Softness of Sound, Intensity of Sound, Pitch, Noise, Speed of Sound in Air, etc.

This topic covers concepts such as Musical Instruments, Music, Production of Music, Ways to Produce Sound in Musical Instruments, Production of Sound by Beating the Diaphragm of Musical Instrument, etc.

This topic covers concepts such as Sound Produced by Different Animals, Human Sound Producing Organs, Vocal Cord, Windpipe, etc.