Define Sound?, Sound is a Form of Energy, How is sound produced?, Sound is produced when an object vibrates. These vibrations create disturbances in the medium, which travel as sound waves to our ears., Why can’t sound travel through a vacuum?, Sound needs a medium (air, water, or solids) to travel. In a vacuum, there are no particles to carry vibrations, so sound cannot travel., What is frequency?, Frequency is the number of vibrations or oscillations an object makes in one second. It is measured in Hertz (Hz)., What is amplitude?, Amplitude is the maximum displacement of a vibrating object from its rest position. It decides how loud a sound is., Define loudness., Loudness is the measure of the sound energy reaching our ears. It depends on the amplitude of vibration., What is pitch?, Pitch is the sensation by which we distinguish between a high and a low sound. It depends on the frequency of the sound., How do humans produce sound?, Humans produce sound using their voice box or larynx. The vocal cords inside the larynx vibrate as air passes through them, producing sound., What is noise?, Noise: Unpleasant, unwanted sound (e.g., traffic). Musical sound: Pleasant and rhythmic sound (e.g., musical instruments)., What are musical sounds, Musical sound: Pleasant and rhythmic sound (e.g., musical instruments)., Why do we hear thunder after lightning although both occur at the same time?, Light travels much faster (3×10⁸ m/s) than sound (340 m/s). So we see lightning instantly, but sound takes longer to reach us., A drum and a flute produce different sounds. Why?, They produce vibrations of different frequencies. A drum produces low-frequency (low pitch) sounds, while a flute produces high-frequency (high pitch) sounds., Why does sound travel faster in solids than in gases?, Particles in solids are closely packed, so vibrations travel faster. In gases, particles are far apart, so vibrations travel slowly.

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