The Nature of Sound Physics Chapter 16A.

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Presentation transcript:

The Nature of Sound Physics Chapter 16A

Sound waves Sound is a compressional (longitudinal) wave Series of compressions and rarefactions in a medium Produced by something vibrating

Speed of Sound Speed of the wave depends on the density of particles in the medium Travels fastest through solid Because the particles are: Travels slowest through gas Does NOT travel in a vacuum Speed of the wave depends on temperature Speed does NOT depend on loudness (amplitude) of the sound YouTube - Sound Waves and their Sources (1933)

Sound obeys the wave equation! V = fλ Example: A sound wave has a frequency of 261.6 Hz. What is the wavelength of this sound traveling in air at 343 m/s?