Chapters

Chapter : 13 - Sound
अध्याय 13 - ध्वनि

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Sound by vibration
कम्पन से ध्वनि

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Instruments and sound
ववाद्ययंत्र और ध्वनि

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Voice box in humans
मनुष्यों में वाक् यंत्र

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Medium for sound propagation
ध्वनि संचरण के लिए माध्यम

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Amplitude and frequency of sound
ध्वनि का आयाम और आवृति

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Noise Pollution

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Vibrator

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