fundamental frequency 基频
higher harmonics 高次谐波
harmonic series 谐波级数
frequency spectrum 频谱
waveform 波形
audio signal 音频信号
1. The first harmonic of the guitar string determines the pitch of the note.
吉他弦的第一谐波（基波）决定了音符的音高。
2. In this signal, the first harmonic is much stronger than the higher harmonics.
在这个信号中，第一谐波比高次谐波强得多。
3. Engineers analyze the first harmonic to identify the main frequency of the power grid.
工程师通过分析第一谐波来识别电网的主要频率。
A: Why does the piano sound different from the synthesizer?
A：为什么钢琴听起来和合成器不一样？
B: It's because the piano has a rich mix of the first harmonic and many higher harmonics, while the synth might only play the first harmonic cleanly.
B：因为钢琴混合了丰富的第一谐波和许多高次谐波，而合成器可能只干净地播放第一谐波。
1) 基波：周期性信号中频率最低的分量。
2) 一阶谐波：频率等于基频的谐波。
3) 在音乐中，通常对应于乐音的主频率。
1. [物理/声学] 基波；第一谐波
e.g.The amplitude of the first harmonic was measured to be 10 volts.
测得第一谐波的振幅为10伏特。
noun
1. The fundamental frequency of a periodic wave; the lowest frequency component in a harmonic series.
Synonym: fundamental, fundamental frequency