Just like a visual spiral gets smaller and smaller, the sounds of each fork played in succession get closer and closer together. The first four tuning forks come from Pythagorean intervals (Solar Harmonic Tuning Forks) and represent the ratios as well as notes, but the other four are microtonal and just expressed as ratios. John Beaulieu created the tuning forks based on the ratios of the Fibonacci sequence. The Fibonacci series of tuning forks create a perfect sonic spiral like the picture of a seashell. The Fibonacci sequence is one of these geometric patterns and may be one of the most important. Seeing this phenomenon in action is proof that there is an order to things in the universe and that this order is based on vibration and frequency. The places where the sand on a vibrating plate forms into these shapes are the zero or still points and the empty space is the vibration around it. We also see this in the study of Cymatics ( ), where certain frequencies form beautiful geometric patterns. In nature, matter fluctuates between various still points. Hurricane Sandy Spiral separated into Segments. Notice, in both images there is an 'eye' which is the still point, the area of nothingness. The image of Hurricane Sandy I found separates the giant swirling storm into Fibonacci segments. In fact, any conch shell you find on the beach and put to your ear up to 'hear the ocean' is shaped according to the Fibonacci sequence. The cross section of the seashell below is a perfect example. I've provided a couple images that vividly demonstrate the Fibonacci spiral. The simple mathematical formula of the Fibonacci series creates spirals in all forms in nature. The number is irrational, meaning it goes on forever in a spiral getting closer and closer to the center or still point. The further we go into the sequence, the closer we get to a mathematical principle called the Golden Mean or Phi. This sequence is his most well known contribution to the world of mathematics. Keep reading to find out whether a tuning fork can make your teeth explode.The Fibonacci sequence is named after the brilliant mathematician who lived in the late 12th/early 13th century in Italy. Due to cost considerations, however, most modern tuning forks are made out of stainless steel. Really soft metals like tin, gold and lead, meanwhile, won't make any noise at all. Soft metals like brass have a low, dull pitch. Dense metals like copper and steel vibrate with a crisp, high pitch. You can also adjust the pitch of a tuning fork by making it out of different materials. If someone ever finds a hammer big enough to hit it, the sound would most likely be too low to be heard by human ears. The largest tuning fork in the world, by the way, is a 45-foot (13.7-meter) sculpture in Berkeley, Calif. A loose string, on the other hand, takes longer to shudder back and forth, resulting in a lower tone. Without much room to wobble, a tight string vibrates quickly. It's the same principle as strings on a guitar. The smaller a tine, the less distance it has to move, and the faster it will be able to vibrate. To mimic the lowest key, on the other hand, it would only need to vibrate at 28 Hz.īut how do you adjust the speed at which a tuning fork vibrates? Well, first, you could adjust the length of your tuning fork. For instance, for a tuning fork to mimic the top key on a piano, it needs to vibrate at 4,000 Hz. The faster a tuning fork's frequency, the higher the pitch of the note it plays. The result is a steady collection of rarefactions and compressions that, together, form a sound wave. When the tines snap back toward each other, they suck surrounding air molecules apart, forming small, low-pressure areas known as rarefactions. When a tuning fork's tines are moving away from one another, it pushes surrounding air molecules together, forming small, high-pressure areas known as compressions. The way a tuning fork's vibrations interact with the surrounding air is what causes sound to form.
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