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Exploring the Wonders of Sound: Origins, Characteristics, and Perception

Discover the fascinating world of sound, from its origins in vibrating bodies to its perception by biological and technical receptors. Learn how sound is characterized by attributes like loudness, pitch, timbre, and duration, and how it travels through different mediums. Dive into the physics of sound and explore concepts like waves, resonance, and noise to deepen your understanding of this essential part of our auditory experience.

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Exploring the Wonders of Sound: Origins, Characteristics, and Perception

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  1. What do we know about sound?

  2. Where does it come from? • Vibrating bodies • Changing airflow • Time-dependent heat sources • Supersonic flow

  3. 1. Biological receptors: Pressure changes on eardrums, skin 2. Technical receptors: microphone 3. Mechanical vibrations 4. Other indication (reactions of animals) How do we know it is there?

  4. 1. loudness loud, intense vs. soft, silent 2. pitch high pitched vs. low pitched bass vs. soprano 3. timbre or “color” warm, soft vs. shrill, piercing 4. duration How do we characterize sound?

  5. Travels through a medium (gas, liquid, solid) “waves” Medium modifies the sound Distance changes loudness Motion of source or observer changes pitch. How does it get from the source to the receptor?

  6. Physiologically? Is there a place of absolute silence? • Physically? NOISE

  7. We will have to study some Physics fundamentals: Motion, force, pressure, energy, power, oscillations, waves, resonance, … Let’s go! How will we be able to understand some of these observations?

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