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Others Like “Digital Voice Analysis”

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Science Fair Project Idea
Beats are a pattern of oscillating sound intensity (i.e., the volume of the pattern grows and fades with a regular cycle). They occur when two tones of almost equal frequency interfere. People can perceive beat frequencies below about 7 Hz. Figure out how to create sound files to play pure tones on your computer. Create files with a pure tone of one frequency in the left channel, and a pure tone of a different frequency in the right channel. Systematically explore different frequency… Read more
Music_p001
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Time Required Long (2-4 weeks)
Science Fair Project Idea
Learn how to edit sound files so that you can manipulate the recorded sound mathematically. You can either find specialized audio editing software or do background research to teach yourself about sound file structure so that you can write your own simple program to manipulate sound files. Try arithmetic operations on the sound values (e.g., adding or subtracting a constant, multiplying or dividing by a constant). How do these operations alter the sound? Try other mathematical operations:… Read more
CompSci_p029
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Time Required Average (6-10 days)
Science Fair Project Idea
A solution consists of a solute dissolved in a solvent. A solution is saturated when no additional solute will dissolve in it. Can a saturated solution of sodium chloride dissolve any Epsom salts? Can a saturated solution of Epsom salts dissolve any sodium chloride? How does solubility vary with temperature? How does solubility vary with the surface area of the solute? Design experiments to find out! (Gardner, 1999, 16-17, Stretton, 2004) Read more
Chem_p038
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Time Required Average (6-10 days)
Science Fair Project Idea
You probably know that you can use iron filings to reveal the magnetic field produced by a strong magnet. If you sandwich the iron filings between pieces of waxed paper, you can make a permanent record of your magnetic experiments (Gardner, 2004, 66). Cover the wax paper sandwich with a layer of brown paper (from a roll, or cut open a paper shopping bag), and then (with an adult's help) use a hot, dry iron to seal the waxed paper together. You will have to experiment a little with your iron… Read more
Elec_p043
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Time Required Short (2-5 days)
Science Fair Project Idea
What are the best materials to use for blocking out unwanted noise from the environment? You can build a test box (or test frame) around an audio speaker. Use a sound level meter to measure the speaker output. Use different materials to cover the walls of your test box (or frame), and see which materials do the best job at blocking the sound. For a more advanced project, perform your tests using different sound frequencies. Are some materials better at blocking certain frequencies than… Read more
MatlSci_p033
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Time Required Average (6-10 days)
Science Fair Project Idea
Whether you have already tried the Science Buddies Build a Paper Speaker activity or the project, or you just like music and are interested in exploring more about the science of sound, then this project is for you. You probably know that sound waves can have different frequencies. If not, you can read more about that in the background section of the project. The range of human hearing is typically about 20 hertz (Hz) to 20,000 Hz. Frequencies at the lower end of this… Read more
Phys_p102
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Time Required Average (6-10 days)
Prerequisites None
Material Availability Specialty electronics items required.
Cost Average ($40 - $80)
Safety Always keep speaker volume at safe levels to avoid hearing damage.
Science Fair Project Idea
If you're interested in analyzing how things break, check out the Science Buddies project . Read more
MatlSci_p032
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Time Required Short (2-5 days)
Science Fair Project Idea
Compare the strengths and weaknesses of different digital image formats. How does the amount of compression affect a JPEG image? What happens when you save a JPEG image multiple times? Read more
Photo_p019
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Time Required Short (2-5 days)
Science Fair Project Idea
Advanced students might want to look for an experiment in the areas of color theory or gamma and light curves. Following web page can help you get started: Read more
Photo_p021
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Time Required Long (2-4 weeks)
Science Fair Project Idea
How does the angle between the lens, the subject's eye, and the flash effect the appearance of red eye? How does the subject's eye color effect red eye? Read more
Photo_p022
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Time Required Average (6-10 days)
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