Sound

With the help of various activities, we will come across the production of sound. It explains how the vibrating tuning fork produces sound. We will also observe the result when both the prongs of the vibrating tuning fork are dipped in water.

Sound is produced by vibrating objects. Here, we will study about the types of materials or substances required for the transmission of sound. It discusses characteristics of sound waves and also mentions the speed of sound in different mediums.

This topic is all about the reflection of sound. It discusses the concept of echo and reverberation in detail. We will come across various solved examples as well. Furthermore, it highlights different uses of multiple reflection of sound.

Here, we will get to know the audible range of human beings and animals. It describes that a hearing aid is an electronic, battery-operated device. It explains how the hearing aid receives sound through a microphone and also highlights its use.

Ultrasounds are high frequency waves. This topic highlights the applications of ultrasound. It includes a description of ultrasound scanner and SONAR. We will also learn how ultrasound is sent by the transmitter and received by the detector.

In this topic, we will learn about the structure of human ear with the help of a well-labeled diagram. It explains how we are able to hear the sound with the sensitive device ear. The auditory aspect of human ear is also discussed here in detail.