Re: Probably out of context - struck plates question (Brent Kirkwood )

Subject: Re: Probably out of context - struck plates question
From:    Brent Kirkwood  <bki@xxxxxxxx>
Date:    Wed, 28 Feb 2007 10:56:11 +0100

Hi Eliot, I am not sure if it is of interest to you, but I have spectrograms of the sounds recorded from when I dropped a set of rods onto a floor. I have them for various lengths, materials, diameters, and drop heights. Unfortunately, no plates though - only rods (13 mm, 16 mm, and 25 mm in diameter). And I haven't made any attempts to map out the modes, relative levels of harmonics, etc. Let me know if they are of any interest. I have set the reply address of this email to my home address. I will be away from work for the next couple week, so you will probably get a quicker response by replying to that address (bck@xxxxxxxx). Regards, Brent AUDITORY - Research in Auditory Perception <AUDITORY@xxxxxxxx> wrote on 02/22/2007 12:11:55 PM: > Hi all > > this is probably not relevant to list members but i thought it > worth a shot... > > Basically I'm wondering of anyone has seen any papers which have > looked at the spectra/energy of the first moments of a struck object > such as a plate. > > Not the ongoing complex decay information really, just a > amplitude/frequency plot of that first reaction, such as something > which has mapped out the various modes going on and their relative > levels in relation to the fundamental (not so much the "bang" of the > strike/impulse). > > Make sense? i hope so... > > im finding two types of informaiton out there: > > high level calcualtions for modal analysis (for the acousticians), > and lots of theory on physical modelling... but what im hoping for > is just a bit of analysis from an actual (or virutal) struck 2d object > > any directions, papers, examples much appreciated. > > thanks all > > Eliot

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