Vocal cord/fold vibration and pitch vs volume

[chamcham]

A fairly simple question.

In terms of what is happening physically inside the

body while singing, what is the difference between:

increasing pitch without changing volume

increasing volume without changing pitch

What is the relation of the above two to vocal cord/fold vibration?

Thank you.

[Negoba]

Amplitude vs. Frequency.

As a guitarist (and brass player before that), I always think of tubes and string first.

If you tighten the string, the pitch goes up, but hitting it harder only changes the volume.

Pitch requires a laryngeal muscle to tighten. Volume should come from the air source.

[Mivke]

I agree with most of what you just said Owen, but for some the science behind it CAN be the mental imagery needed

At least as a strengthening connection to some kind of sensation