I sent the first part of this to Lilian Thorpe because I prefer to lurk.
But since Ronald Hamilton also asked, I thought there might be enough general
interest to post to the list.
A whistle is a primitive recorder right? Well what makes a recorder more in tune
over a wider range is, in part, the tapered shape of the barrel. Note: the
reversed to oboes, clarinets & bagpipe chanters. This taper affects the
at the end of the pipe. The "effective" length of a pipe is actually longer than
the metric length of the pipe. That is, the column of air being vibrated sticks
out the bottom of the pipe or past the last open hole. On a cylindrical
causes the octaves to be out of tune because the effective length of the pipe
isn't a factor of 2 or 1/2 from that of the original note.
The taper seems to correct this.
Other considerations, which recorder makers are well aware of are the shape
of the fipple & length of the opening. A recorder maker could teach us a lot.
Carbon dioxide has a greater molecular weight than air & therefore causes an air
column to vibrate more slowly, hence the lower pitch when you belch beer gas.
Copeland in Philadelphia makes a tapered penny whistle. Mine seems to be
well in tune.
"Lark in the Morning" in Mendocino sells them by mail order. (707 area code).
Regards, Clyde F. O'Neal II, [log in to unmask], Menlo Park California.
Whatever I say is my own opinion and it does not represent the U. S.