Originally Posted by kalijah

Nordlands wrote:



Yes, the air flow is constant through the system, from lungs to bell. (With a minor exception)

And the speed can be determined anywhere by considering the cross section.

But you must be careful that you understand that because the air is "faster" through a narrow segment, this does not mean that the air has more energy due to this increase in speed due to "narrowing".

And it also becomes evident that the greatest velocity is through the aperture.

Also, increasing the narrowing anywhere in the system before the mp cup also increases the resistance and would yield a smaller flow for the same pressure. But usually not much less for most normal actions of tongue arch.

For example, tongue arch proponents make the claim that arching the tongue "speeds up" the air and the resulting "faster" air yields a higher pitch.

There are two faults to this way of thinking:

1. Arching the tongue will never increase the air energy at the aperture (total pressure) above what the lungs provide. and..

2. The pitch will not change unless the aperture pulsation frequency changes. The aperture itself must change. Namely, become smaller, to ascend.