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Unformatted text preview: that the exact point at which a sound wave is reflecting at an open end is not perfectly at the end section of the tube, but a small distance outside the tube. The reflection ratio is slightly less than 1; the open end does not behave like an infinitesimal acoustic impedance ; rather, it has a finite value, called radiation impedance, which is dependent on the diameter of the tube, the wavelength, and the type of reflection board possibly present around the opening of the tube. Closed A closed cylinder will have approximate resonances of where "n" here is an odd number (1, 3, 5. ..). This type of tube produces only odd harmonics and has its fundamental frequency an octave lower than that of an open cylinder (that is, half the frequency) . A more accurate equation is given below:...
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This note was uploaded on 05/23/2011 for the course MATH 130 taught by Professor Page during the Spring '11 term at Imperial College.
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