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high frequency wave vs low frequency wave
high frequency vs low frequency
low and high frequency waves
high frequency versus low frequency
high frequency compared to low frequency
high frequency and low frequency difference
low frequency sound vs high frequency
radio wave high or low frequency
low vs high frequency
wave with low frequency
high frequency wave vs low frequency wave, high frequency vs low frequency, low and high frequency waves, high frequency versus low frequency, high frequency compared to low frequency, high frequency and low frequency difference, low frequency sound vs high frequency, radio wave high or low frequency, low vs high frequency, wave with low frequency
