Beats and the Doppler Effect (HSC SSCE Physics): Flashcards

Pulsing effect when 2 frequencies superpose

$f_{\text{beat}} = |f_2 - f_1|$

Frequency difference < ~$20 \text{ Hz}$

Beat frequency decreases as instruments reach same pitch

Change in observed frequency from relative motion

Frequency increases (higher pitch)

Frequency decreases (lower pitch)

$f' = f\frac{(v + v_o)}{(v - v_s)}$

$340 \text{ m}\cdot\text{s}^{-1}$ at room temp

Shock wave when source moves faster than sound