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Chapter Summary

Sound and Communication

NIOS · Class 10 · Science & Tech

Summary of Sound and Communication for NIOS Class 10 Science & Tech. Key concepts, important points, and chapter overview.

43 questions42 flashcards5 concepts

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An illustration of an experiment demonstrating that sound is produced by vibrations, using a bent metallic hanger (bow) and a stretched elastic string. Shows the string vibrating when plucked and a sm
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Overview

Sound is produced by vibration and travels as a mechanical wave through a medium. Communication through sound has shaped daily life, music, telephones, microphones, satellites, and devices such as SONAR and RADAR. The chapter connects the nature of waves with real-life communication systems, sound q

Key Concepts

Sound is a result of vibration

Sound is a result of vibration. A vibrating source produces a disturbance that travels through a medium and is sensed by the ear. If vibration stops,

Sound is a mechanical wave

Sound is a mechanical wave, so it needs a medium to travel. It cannot travel in vacuum. Sound travels faster in solids than in liquids or gases, and i

Electromagnetic waves do not need

Electromagnetic waves do not need a medium to travel. They move at the speed of light in free space, about 2.997925×10^8 m/s.

A wave is described by amplitude

A wave is described by amplitude, wavelength, time period, frequency, and speed. Time period and frequency are inversely related, and wave speed is gi

Human beings hear sound in

Human beings hear sound in the range 16 Hz to 20,000 Hz. Waves below 16 Hz are infrasonic and waves above 20 kHz are ultrasonic.

Learning Objectives

  • Understand that sound is produced by vibration and needs a medium to travel
  • Distinguish between mechanical waves and electromagnetic waves
  • Describe wave properties such as amplitude, wavelength, frequency, time period, and speed
  • Explain the difference between transverse and longitudinal waves
  • Understand loudness, pitch, quality, and the decibel scale

Frequently Asked Questions

What are the important topics in Sound and Communication for NIOS Class 10 Science & Tech?
Key topics in Sound and Communication include Sound and Communication Concept Overview, Overview of different types of communication methods and technologies, Process of sound production and perception from vibration to hearing. These are the concepts NIOS Class 10 examiners draw on most — study them first, then practise related questions.
How to score full marks in Sound and Communication — NIOS Class 10 Science & Tech?
Understand the core concepts first, then work through the 43 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

More resources for Sound and Communication

All 32 chapters — NIOS Class 10 Science & Tech Chapter Summary

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