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Special Topic: Sound

Special Topic: Sound. Overview. What is sound? How is it made? How can I make sound with the Wunderboard?. What is Sound?. Sound is vibration of molecules Sound has Amplitude (Loudness) Frequency (Pitch). ‘Types’ of sound. Pure Sine Waves Square Waves. More ‘Types’ of Sounds.

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Special Topic: Sound

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  1. Special Topic: Sound

  2. Overview • What is sound? • How is it made? • How can I make sound with the Wunderboard?

  3. What is Sound? • Sound is vibration of molecules • Sound has • Amplitude (Loudness) • Frequency (Pitch)

  4. ‘Types’ of sound • Pure Sine Waves • Square Waves

  5. More ‘Types’ of Sounds • Voice

  6. How is sound made? • Quickly moving objects • Speakers • http://www.youtube.com/watch?v=F4frsl7gW0A • Flyback Transformers • http://www.youtube.com/watch?v=w8d0GorQmrY • Fans

  7. Driving Headphones • Square Waves • Main frequency is at center • Sounds pretty ‘8 bit’ • PWM • Much smoother output • Sounds pretty good.

  8. Simple Sound Example • Uses the headphone jack • UsesTimer1 • Simple square wave sound

  9. Things to remember • Hardware can take care of some simple tasks • Sound is easy to make, hardto make sound nice

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