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When you hear an ambulance siren, it alternates between high and low tones, depending on the frequency of sound waves. this is called _____?

Respuesta :

W0lf93
Frequency of a sound wave is called the pitch. Higher frequencies have a higher pitch and lower frequencies have the opposite. When an ambulance travels by a listener, the frequencies are oscillating rapidly and causing the shrill, loud sounds that emanate from the sirens.