![]() ![]() Record or observe the amplitude of the signal. ![]() Pay attention to how hard you are strumming, and try to strum with the same force each time. Hold the guitar snugly so that the back of the guitar body is making contact with your chest and stomach, and strum a chord several times.Sit in a chair a few feet away from the microphone with your guitar.You can choose any instrument with a soundboard to do your testing, but general instructions are given here for an acoustic guitar: If you are using a personal computer, the Bibliography provides a link to free software that will allow you to look at and compare your sound recordings. You will need a personal computer, either laptop or desktop, with a built-in microphone or a tape recorder with a visual display of incoming signals. In certain positions there is more damping of the soundboard, which results in a lower amplitude of sound. In this music science fair project, you will investigate how positioning affects the ability of a soundboard to transmit sound. Did you know that you can hear the chirps of little black crickets at night thanks to small soundboards built right into their bodies? Yes, to increase the volume of their chirps, the crickets lift their wings to a 45-degree angle, creating a soundboard! ![]() Soundboards are common in the world of musical instruments, but they can even be found in nature. The soundboard is positioned so that it gathers the sound vibrations coming from the strings and then retransmits them at an even greater volume when it begins to vibrate. All stringed instruments use a soundboard to amplify (greatly increase) the volume of the sound coming from vibrations of the strings. What do a guitar, a piano, a harp and a violin have in common? Turns out a couple of things, including a soundboard. If you want a Project Idea with full instructions, please pick one without an asterisk (*) at the end of the title. Our Experts won't do the work for you, but they will make suggestions and offer guidance if you come to them with specific questions. If you would like to discuss your ideas or need help troubleshooting, use the Ask An Expert forum. Use the information in the summary tab as a starting place. For this science project you will need to develop your own experimental procedure. ![]()
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