Try this activity to find out if you can! This might make you wonder if you can tell what object dropped, what it is made of, how heavy it is or its shape just by listening to the sound it makes when you drop it. If the same object is dropped again, the crash sounds similar because the object vibrates in a similar way. When a hard material crashes onto a hard floor, the sudden impact makes it vibrate and creates a sound with a particular tone. There are many faster vibrations-called overtones-on top of the main vibration, each with their own volume. For example, the middle C on a piano does not sound the same as the middle C on a guitar, a violin or a flute because these objects each vibrate in a complex way. Each musical note has a specific pitch, but tones with the same pitch can sound very different. Fast or slow vibrations are perceived as high or low pitch sounds, respectively. This is because vibrations come in a wide variety, and they all influence tone, which consists of sound quality, pitch and volume. Your ears register the vibration and transmit it as nerve impulses to your brain, which converts it into the sound you hear. This sequence occurs with any sound you hear: It starts with a vibration, which is carried by one or more media (air, water, the wall, etcetera) to your ears. Can you feel it vibrate? That vibration in your throat also occurs in the air, which your ears pick up and together with your brain translates it into the humming sound you hear. Start to hum and then touch the front of your throat. Have you ever thought about the sheer number of words that exist in the English language to describe sounds? A noise can be a thud, a clang, a bang, a pop, a crash, a splash, a clatter, a buzz, a tinkle and many more! You can probably think of an example for each of these-but if you heard the sound, could you say what produced it?

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