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Amplitude is the characteristic of the sound that determines the loudness of the sound. It is directly proportional to the square of the amplitude of vibration. If the amplitude of the sound wave becomes double, then the loudness of the sound will be quadrupled. It is expressed in decibel (dB). Sounds above 80 dB become noise to human ears.
1 day ago · The Class 8 Science Sound Notes provides an overview of the chapter Sound through solved exercise questions that enhance and improvise preparation. The Notes of the Chapter 13 Science Class 8 PDF, available in downloadable format, are an authentic source of reference curated by experts to build-up the preparation process.
NCERT Solutions for Class 10 Maths Chapter 8; ... Sound Noise Definition: It is defined as the continuous vibrations that travel from one medium to another ...
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As you learnt in Class VII the to and fro or back and forth motion of an object is called vibration. When a tightly stretched band is plucked, it vibrates and produces sound. When it stops vibrating, it does not produce any sound. Activity 10.3 Take a metal dish. Pour water in it. Strike it at its edge with a spoon (Fig. 13.4). Do you hear a sound?
Sound lesson. Theoretical materials and tasks in Science CBSE, Class 8.
The quality or timbre of sound is that characteristic which enables us to distinguish one sound from another having the same pitch and loudness. The sound which is more pleasant is said to be of a rich quality.
