 In this sense, "subharmonic" is a term created by reflection from the second sense of the term "harmonic", which in that sense refers to an instrumental technique for making an instrument's pitch seem higher than normal by eliminating some lower partials by damping the resonator at the antinodes of vibration of those partials (such as placing a finger lightly on a string at certain locations).In a very loose third sense, "subharmonic" is sometimes used or misused to represent any frequency lower than some other known frequency or frequencies, no matter what the frequency relationship is between those frequencies and no matter the method of production.The overtone series can be produced physically in two ways – either by overblowing a wind instrument, or by dividing a monochord string.