The Evolving World of Acoustics and Vibration TechnologiesSince ancient times, humans have performed experiments to comprehend the nature of sound. In the 6th century BC, Pythagoras, one of the greatest minds in history, studied the numerical proportionality of harmonious chords (consonance) as a means to explore sound through mathematical methods. By the end of the 15th century, Leonardo da Vinci had investigated the resonance of sound and the way waves ripple out across the surface of water. In the 17th century, Gassendi made an attempt to measure the speed of sound. The image presented here shows a set of resonators used for frequency analysis. These resonators were designed by Karl Rudolph Koenig, a German researcher who was actively engaged in frequency research during the early 20th century. This set of resonators holds significant historical importance in the realm of audio research. When the protruding end of the brass cylinder is inserted into the ear, it enhances a specific audio frequency, allowing it to be heard. The shell of the cylinder can be adjusted to modify the internal volume, and the frequency of the perceived sound can be determined by consulting the scale engraved on the cylinder. The insights gleaned from these resonators, along with the principles established based on these insights, have found a range of applications, including in pipe organs and sound absorption equipment used in theaters.Courtesy of the Museum for the Science of Sound, Kobayasi Institute of Physical ResearchPhoto by Yuki AkabaKoenig’s apparatus for analyzing soundOwned by the Museum for the Science of Sound, Kobayasi Institute of Physical ResearchThe World Of AcousticsThe World Of Acoustics
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