It leads to higher harmonics amplitudes in lower frequency range.
它产生低频段的高振幅。
The goal is to reduce the energy emitted to produce the lower frequency range that is useful for seismic, while decreasing the emission of frequencies said to cause trouble for Marine life.
减少能量旨在产生一个低频范围，这在地震预测上具有重要的使用价值，但是降低发射频率将会给海洋生物带来些许麻烦。
The bats can also "sweep through a frequency range of up to 170 kilohertz, " moving from lower to higher notes, "while a human singer produces a glissando through less than 2 kilohertz at most."
蝙蝠音频频率范围也可以高达170千赫，是=由从低频逐渐到高频。
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