n. 调整，调节；(声调的)抑扬，变化；【音乐】转调，变调；【无线电】调制。 amplitude modulation 振幅调制，调幅。 frequency modulation 频率调制，调频。 overmodulation 过(度)调(制)。
the act of modifying or adjusting according to due measure and proportion (as with regard to artistic effect)
(electronics) the transmission of a signal by using it to vary a carrier wave; changing the carrier''s amplitude or frequency or phase
a manner of speaking in which the loudness or pitch or tone of the voice is modified 同义词：inflection,
rise and fall of the voice pitch 同义词：intonation, pitch contour,
a musical passage moving from one key to another 同义词：transition,
In electronics and telecommunications, modulation is the process of varying one or more properties of a periodic waveform, called the carrier signal, with a modulating signal which typically contains information to be transmitted. This is done in a similar fashion to a musician modulating a tone (a periodic waveform) from a musical instrument by varying its volume, timing and pitch.
例句与用法
1.
These two modulations are quite distinct . 这两个调幅性质十分不同。
2.
Our fifth concern is with modulation noise . 我们要讨论的第五个问题是调制噪声。
3.
Frequency modulation does not allow static to creep in . 频率调制不允许静电干扰混入。
4.
Frequency modulation is not possible with polychromatic light . 多色光不可能调制频率。
5.
The soft modulation of her voice soothed the infant . 她声调柔和的抑扬使婴儿安静下来。
6.
The nodal modulation is a very significant feature of the tides . 交点调节是一个非常重要的潮汐特征。
7.
It was the voice of a born orator, rich in possible modulations . 这是一个天生演说家的富于抑扬顿挫的声音。
8.
Position control of d. c. motors has been done by means of pulse width modulation . 直流电机位置用脉冲宽度调制法控制。
9.
Mode locking can be induced not only by loss modulation, but also by phase modulation . 锁模不仅可用损耗调制取得，也可用位相调制来得到。
10.
Evidently, there is another motion to be concerned with and that is the propagation of the modulation envelope . 显然，还应当考虑另外一种运动，那就是调制包络的传播。
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