Sound

This topic covers concepts such as Frequency, Time Period, Vibrations, Production of Wave and Sound by Tuning Fork, Activity on Production of Sound, Human Sound Producing Organs, Larynx, Vocal Cord, Windpipe, Sound, Sound Energy, etc.

This topic covers concepts such as Properties of Waves, Wavelength, Sound Wave, Compression, Rarefaction, High Pressure Area, Low Pressure Area, Mechanical Waves, Longitudinal Waves, Transverse Waves, Sound Propagation and Vacuum, etc.

This topic covers concepts such as Audible Range, Infrasonic Sound, Ultrasonic Sound, Laws for Reflection of Sound, Echo, Reverberation, Uses of Multiple Reflection of Sound, Multiple Reflection of Sound, Reflection of Sound, Sonar, etc.

This topic covers concepts such as Pitch, Loudness of Sound, Quality of Sound, Amplitude of Wave, Intensity of Sound, Characteristic of Sound, Grave Sound, Shrill Sound, Factors Affecting Intensity of Sound, and Ways to Vary Pitch of Sound.

This topic covers concepts such as Human Ear, Parts of Human Ear, Outer Ear, Middle Ear, Inner Ear, Eardrum, and Structure of Human Ear.

This topic covers concepts such as Noise, Production of Noise, Noise Pollution, Measures to Reduce Noise Pollution, Harmful Effects of Noise Pollution, and Decibel Level of Some Common Sound.