[Guest]

Frequently in movies someone falls from a high place and we hear a long continuous cry of horror growing fainter as the faller recedes from us downward. What is often the common error in this sound effect?

this is my first riddle so it might be easy.

The sound effect ordinarily gets fainter,but it does not lower in pitch as it should according to the Doppler effect: As the faller's speed increases (acceleration), the sound frequency lessens.

[bonanova]

Red shift.

And the hidden pile of mattresses.

[Guest]

Although you have mentioned the answer in the question itself, the rate of increase in pitch of the shout is inversely proportionate to the distance from the ground....

which means , as the ground approached the person falling increases the pitch of the shout which compensates for the moving object and the sound only appears to be fading

till it fades out of the world with a big thud

so now denizens, what else is amiss in the sound effect

[Shakeepuddn]

The doppler effect is a phenomenon relative to the receiver's (listeners) position to the sound source. The pitch will remain the same from Person A's perspective so long as receding victim "B" doesn't change direction in mid "flight." True frequency (pitch) is only attained at CPA or closest point of approach.

[bonanova]

Draw a line between the sound source and the listener.

Consider motion parallel to that line.

Doppler-induced change in pitch heard by the listener depends on:

1. Motion of the source
   
2. Motion of the listner
   
3. Motion of the conducting medium [air, e.g.]
   

Position of source or listener, constrained to that line, has nothing to do with pitch change.

Only its change: speed.

[Guest]

Draw a line between the sound source and the listener.

Consider motion parallel to that line.

Doppler-induced change in pitch heard by the listener depends on:

1. Motion of the source
   
2. Motion of the listner
   
3. Motion of the conducting medium [air, e.g.]
   

Position of source or listener, constrained to that line, has nothing to do with pitch change.

Only its change: speed.

I got this from a very good puzzle book, I don't think there is a big margin of error. Of course, it could be wrong if the author and editor were complete nitwits.

[Guest]

Red shift.

And the hidden pile of mattresses.

lol but not right.

[Guest]

He he, this reminds me of a great youtube clip....

Anyways, the answer:

[Guest]

Other than the fact that the scream dies out, yet we still seem to hear the wet

squishy landing?