chapitre 1 Flashcards by Unknown Unknown

Q

son percu par l’oreille humaine

A

10e-12W.m-2 = intensité de référence

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Q

seuil de douleur

A

1W.m-2

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Q

intensité sonore

A

I=P/S = P/ 4pid2

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Q

vitesse

A

v=lambda/T =lambda*f

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Q

fréquence

A

f=1/T

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Q

niveau d’intensité sonore

A

L=10log (I/I0) ou log (10x)=x ou 10e(log x)=x

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Q

intensité sonore de ref

A

Io= 1.0x10e-12W.m-2

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Q

formule intensité sonore + log

A

I=Iox10(L/10)

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Q

décalage doppler (S s’approche)

A

delta f = fx(vs/v-vs) (hz)

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Q

décalage doppler (S s’éloigne)

A

delta f= -f*vs/(v+vs)

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Q

simplification décalage doppler

A

delta f = f*(vs/v)

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Q

décalage doppler en fonction de lambda

A

delta lambda = lambda x (vs/v)

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