Good Vibrations By Chelsea Ziliak 2/20/2010
Science Standard 3 The Physical Setting Indicator 3.3.9- Demonstrate that things that make sound do so by vibrating, such as vocal cords and musical instruments. Taken from:http://dc.doe.in.gov/Standards/AcademicStandards/StandardSearch.aspx
Link to activity:http://www.indianastandardsresources.org/files/sci/sci_3_3_9.pdf
A rapid linear motion of a particle or of an elastic solid about an equilibrium position.
Usually a vibrating string produces a sound whose frequency in most cases is constant. Therefore, since frequency characterizes the pitch , the sound produced is a constant note . Vibrating strings are the basis of any string instrument like guitar , cello , or piano .
Pre-Activity 1. Place fingers on throat. Make high sound, low sound, then say your name in a normal tone.
3. When is a time that you think you may have felt vibrations of a sound?
Harmonicas Take comb and piece of waxed paper Fold wax paper over comb. Play your harmonica by pressing your lips lightly against the paper and humming musical scales.
Experiment with different scales.
Rubber Band Take rubber bands and shoebox. Stretch rubber bands around shoebox. Carefully pluck different rubber bands. What types of sounds do you hear? Watch the vibrations of the rubber bands.
Compare the sounds of the harmonica and the sounds of the rubber bands being plucked.