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10 cards from this deck
Pulsing effect when 2 frequencies superpose
fbeat=ā£f2āf1ā£f_{\text{beat}} = |f_2 - f_1|fbeatā=ā£f2āāf1āā£
Frequency difference < ~20Ā Hz20 \text{ Hz}20Ā Hz
Beat frequency decreases as instruments reach same pitch
Change in observed frequency from relative motion
Frequency increases (higher pitch)
Frequency decreases (lower pitch)
fā²=f(v+vo)(vāvs)f' = f\frac{(v + v_o)}{(v - v_s)}fā²=f(vāvsā)(v+voā)ā
340Ā mā sā1340 \text{ m}\cdot\text{s}^{-1}340Ā mā sā1 at room temp
Shock wave when source moves faster than sound
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