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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