Search found 6 matches

by Tphil
Wed Aug 28, 2013 9:56 pm
Forum: Instrument Builders Forum
Topic: Test correlation
Replies: 6
Views: 6067

Re: Test correlation

I took a more "I'll take what I can get" approach and swept the entire range looking for signs of disturbance. I did dwell longer on those major peak areas, sometimes not getting the expected result. My setup's a bit primitive - a handheld 60W 8" speaker with the box resting on Gladwrap stretched ov...
by Tphil
Tue Aug 27, 2013 6:44 pm
Forum: Instrument Builders Forum
Topic: Test correlation
Replies: 6
Views: 6067

Re: Test correlation

My first thought is that you've not correctly matched the Chaldni patterns to the spectrum analysis. Are you sure the patterns don't correspond to nearby peaks? I haven't really matched patterns to peaks, just marked for clarity where the frequencies noted on the pattern shots lie on the scale. The...
by Tphil
Tue Aug 27, 2013 1:43 pm
Forum: Instrument Builders Forum
Topic: Test correlation
Replies: 6
Views: 6067

Test correlation

Correlating test charts with visual observations can challenge my faculties at times so I put this together which doesn’t take much time and gives me an at-glance reference to some of the things going on in the instrument. Not being a dyed-in-the-wool left brainer, it still takes some time to glean ...
by Tphil
Sun Jun 24, 2012 2:20 pm
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Equ 4.5-5
Replies: 37
Views: 66770

Re: Equ 4.5-5

Ditto Craig - I messed around with brackets, replacing ^'s with *'s without changing results. My targets are coming out a little lower than the book's but only equivalent to a 0.5 change in f and that'll do me - could be what you pointed to Dominic. BTW for iPad/Phone users, there's a handy app call...
by Tphil
Fri Jun 08, 2012 10:01 am
Forum: Instrument Builders Forum
Topic: Another nice wood from behind my yard
Replies: 24
Views: 19144

Re: Another nice wood from behind my yard

Beautiful Jeremy - building and playing. How am I going to laugh?
Wish we had some of those over my back fence :(

Trevor
by Tphil
Wed Jun 06, 2012 3:44 pm
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Collecting Spectrographic data
Replies: 62
Views: 86052

Re: Collecting Spectrographic data

I don't suppose anyone knows of a MAC analog of VA??