After an exhausting session with Victoria's Secret Police, "Tarver
Engineering" confessed the following:

A DC-9 like audable bandwidth starvation was what I was refering to.
(tailcone) The whine is just normal machine noise caused by the way AI
implements airplane systems.

JT you got me there, I have no idea what audible bandwith starvation
is. I've been back in the tail cone of a DC-9/MD-80 with the APU
running...

The A-320 is a better ride to begin with, so the bumps are noticed.

Speaking as a 757 pilot, I can see no basis for your conclusion that
the ride is better on the A-320. With a shorter fuselage there is a
smaller distance from the CG to the nose or tail, so there's less
movement about the CG (thinking teeter-totter) when disturbed. In that
regard the ass end of a 757-300 is pretty darn uncomfortable in lumpy
air while up in the cockpit we think it's not so bad.

But like the DC-9/MD-80, the A319/320 has a lower service ceiling than
the 757, so both often do more deviating for TRWs.

The A319/320 has a wider aisle which Pax and FAs like, but it has
Drift Down issues that 757-200s don't have even with the less powerful
P&W motors vice the Rolls Royce option.

Go-arounds (rejected landings) are much more sporting in the A319/320
in terms of switchology vice the 757. The PNF (pilot not flying) is
just like a one-legged man in an asskicking contest. But as in all
things, pilots can screw the pooch regardless of airplane.

Juvat