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Chapter Summary

Sound and Communication — Chapter Summary

NIOS · Class 10 · Science & Tech

Summary of Sound and Communication for NIOS Class 10 Science & Tech. Part of the NIOS Class 10 Science & Tech syllabus.

43 questions42 flashcards3 formulas & key relations5 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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One of 13 illustrations for Sound and Communication in Super Tutor — alongside flashcards, concept maps and practice questions.

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, vibration, and wave nature, Mechanical and electromagnetic waves, Nature, measure, and quality of sound, Musical sound and instruments. Study these first, then practise questions on each for the NIOS Class 10 board exam.
How should I revise Sound and Communication for the NIOS Class 10 board exam?
Learn the core ideas first, then work through the 43 practice questions on Sound and Communication. Revise 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 NIOS Class 10 Science & Tech Chapter Summary

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