“harmonic”的概念、定义、翻译、参考文献-科学参考

harmonic

Physics

An oscillation having a frequency that is a simple multiple of a fundamental sinusoidal oscillation. The fundamental frequency of a sinusoidal oscillation is usually called the first harmonic. The second harmonic has a frequency twice that of the fundamental and so on. A taut string or column of air, as in a violin or organ, will sound upper harmonics at the same time as the fundamental sounds. This is because the string or column of air divides itself into sections, each section then vibrating as if it were a whole. The upper harmonics are also called overtones, but the second harmonic is the first overtone, and so on. Musicians, however, often regard harmonic and overtone as synonymous, not counting the fundamental as a harmonic. See also spherical harmonics.

Harmonics.

Chemistry

An oscillation having a frequency that is a simple multiple of a fundamental sinusoidal oscillation. The fundamental frequency of a sinusoidal oscillation is usually called the first harmonic. The second harmonic has a frequency twice that of the fundamental, and so on.

Electronics and Electrical Engineering

An oscillation of a periodic quantity, present in a complex vibration, having a frequency that is an integer multiple of the fundamental frequency; the fundamental frequency is also known as the first harmonic. An oscillation having a frequency that is an integer submultiple of the fundamental is termed a subharmonic. In practice the fundamental need not necessarily be present.

Geology and Earth Sciences

A frequency which is a whole multiple of the fundamental frequency; thus the second harmonic has twice the fundamental frequency, the third harmonic three times, etc.

单词	harmonic
释义	harmonic Physics An oscillation having a frequency that is a simple multiple of a fundamental sinusoidal oscillation. The fundamental frequency of a sinusoidal oscillation is usually called the first harmonic. The second harmonic has a frequency twice that of the fundamental and so on. A taut string or column of air, as in a violin or organ, will sound upper harmonics at the same time as the fundamental sounds. This is because the string or column of air divides itself into sections, each section then vibrating as if it were a whole. The upper harmonics are also called overtones, but the second harmonic is the first overtone, and so on. Musicians, however, often regard harmonic and overtone as synonymous, not counting the fundamental as a harmonic. See also spherical harmonics. Harmonics. Chemistry An oscillation having a frequency that is a simple multiple of a fundamental sinusoidal oscillation. The fundamental frequency of a sinusoidal oscillation is usually called the first harmonic. The second harmonic has a frequency twice that of the fundamental, and so on. Electronics and Electrical Engineering An oscillation of a periodic quantity, present in a complex vibration, having a frequency that is an integer multiple of the fundamental frequency; the fundamental frequency is also known as the first harmonic. An oscillation having a frequency that is an integer submultiple of the fundamental is termed a subharmonic. In practice the fundamental need not necessarily be present. Geology and Earth Sciences A frequency which is a whole multiple of the fundamental frequency; thus the second harmonic has twice the fundamental frequency, the third harmonic three times, etc.
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