Home Modern › Forums › UPSEE › Which frequency produces a sound that can be heard by a person? (A) 100 kHz (B) 40 kHz (C) 2 kHz (D) 30 kHz Which frequency produces a sound that can be heard by a person? (A) 100 kHz (B) 40 kHz (C) 2 kHz (D) 30 kHz
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