# Dopper effect

#### doomknight

##### Bing
10+ Year Member
Does the velocity of sound change? I know pitch/frequency/wavelength changes.

#### mrmandrake

##### Full Member
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7+ Year Member
Does the velocity of sound change? I know pitch/frequency/wavelength changes.

no, i dont believe the velocity changes in doppler effect calculations unless the sound is transferred to another medium or something

#### iA-MD2013

##### Full Member
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5+ Year Member
nope, velocity won't change.

10+ Year Member
ok thanks

#### bodonid

##### Dr. Spaceman
10+ Year Member
5+ Year Member
nm, I don't think I understand this well enough to make such generalizations. see below.

#### RSAgator

##### Junior Member
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5+ Year Member
velocity is a property of the medium

#### bodonid

##### Dr. Spaceman
10+ Year Member
5+ Year Member
velocity is a property of the medium

absolute velocity is, yes. But when you walk toward a wave moving at the speed of sound, isn't the observed velocity increased? That is the basis for the Doppler equation, I think.

#### RSAgator

##### Junior Member
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5+ Year Member
Well the velocity doesn't change. The fact that the doppler effect is concerned with a relative velocity doesn't change the fact that velocity itself is a property of the medium =)

10+ Year Member

#### mrmandrake

##### Full Member
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7+ Year Member
absolute velocity is, yes. But when you walk toward a wave moving at the speed of sound, isn't the observed velocity increased? That is the basis for the Doppler equation, I think.

yea, the relative velocity of the sound wave will be changed if you (the detector) are moving too. so if you are moving at 170m/s in the same direction as the wave which moves at 340m/s, it will be moving 170m/s relative to you. this is the doppler effect.

#### bodonid

##### Dr. Spaceman
10+ Year Member
5+ Year Member
Well the velocity doesn't change. The fact that the doppler effect is concerned with a relative velocity doesn't change the fact that velocity itself is a property of the medium =)

agreed.

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