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low frequency to high frequency
high frequency vs low frequency
high frequency and low frequency noise
high frequency vs low frequency waves
low frequency vs high frequency vibration
high frequency and low frequency
high frequency wave vs low frequency wave
high frequency and low frequency waves
low frequency to high frequency, high frequency vs low frequency, high frequency and low frequency noise, high frequency vs low frequency waves, low frequency vs high frequency vibration, high frequency and low frequency, high frequency wave vs low frequency wave, high frequency and low frequency waves
