![]() ![]() The reed and lip act like a valve admitting energy into the resonating air column. To produce the resonating air column in the clarinet, energy is admitted to the clarinet from the player's higher-pressured mouth cavity. In higher registers both odd and even partials are more equally present, so the clarinet loses its distinctive tone quality. This is more prominent in modern German system clarinets than modern French system clarinets. The clarinet is further distinguished from other wind instruments by the relatively low intensity of the even numbered partials in the composite sound of a given note, especially in the chalumeau register. This is why, though all three woodwinds are similar in length, the clarinet can play almost a full octave lower. Wavelengths double for every octave lower in frequency so the wavelength formed in the clarinet is four times the length of tube used versus only two times the length of tube used in the flute or oboe. With the flute and oboe, the wavelength is only twice the length of the corresponding length of tube. The wavelength corresponding to a given frequency is approximately four times the length of the instrument from mouthpiece to the first open hole. The clarinet is the only modern wind instrument that functions acoustically like a stopped cylindrical pipe. ![]() The frequency at which the air vibrates is determined mainly by the bore dimensions, which are changed by combinations of open and closed side holes. The vibrating column of air in the bore produces the clarinet's sound. Vibrations in the column of air in the bore are created by air blown into the clarinet through the reed and mouthpiece. Clarinet Acoustics The Three Main Parts of the ClarinetĬlarinet acoustics are determined by the reed and mouthpiece, the bore and the tone holes.
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