自动调节高中低音。
噪音对信号的掩蔽作用显著，其中低音最易被掩蔽。
The noise occultation was significant, and the undertone was the easiest one to be occulted.
迄今主要产品有：单簧管、圆号、中低音号和长笛等。
The main products are as follows, Clarinet , horn , hitting bass number and flute , etc.
因此，低音炮系统平滑过渡到中低音区域的能力对于实现顶级的高保真至关重要。
For this reason, the ability of a subwoofer system to smoothly transition to the mid-bass region becomes very important to achieving top-notch fidelity.
和弦中低音或最低音的改变影响其性质，但是替换稍高的音则不会影响原和弦的性质。
Changes in the bass or lowest note of a chord affect its nature, but higher notes may be displaced without affecting the nature of the original chord.
实验结果表明，在钢琴的中低音区，不论是单键发音，还是三度和声、五度和声或三度和弦，令第七、第九次谐波的幅度衰减，均能使钢琴声音的音质有所改善。
The result shows that, in the bass and median tone of piano, the timbre will be improved if the 7th and 9th harmonics are attenuated for either single-key, third harmony, fifth harmony or triad chord.
实验结果表明，在钢琴的中低音区，不论是单键发音，还是三度和声、五度和声或三度和弦，令第七、第九次谐波的幅度衰减，均能使钢琴声音的音质有所改善。
The result shows that, in the bass and median tone of piano, the timbre will be improved if the 7th and 9th harmonics are attenuated for either single-key, third harmony, fifth harmony or triad chord.
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