As successively higher notes are fingered, the upper harmonics are gradually extinguished; the even harmonics are disproportionately affected, resulting in an odd-harmonic-dominated sound in the upper range similar to the clarinet both in terms of spectrum characteristics and subjective tone color.
2.
"It is interesting that the hum tone of a bell is generally not audible at all the perceived pitch of the bell ( called the'strike tone') is one octave higher than the hum tone, and there is no component in the sound spectrum of the bell corresponding to the strike tone . " " The strike note is of great interest to psychoacousticians, because it is a subjective tone created by three strong nearly harmonic partials in the bell sound.
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