[Homeroast] Article on automated system of coffee roasting based on crack sounds

David Rossell davidjohnrossell at gmail.com
Mon Jun 16 09:56:09 CDT 2014


There are some interesting parallels to automated speech recognition as
well.  Think about different types of cracks being different dialects of a
language.


On Mon, Jun 16, 2014 at 10:53 AM, Ben Treichel <J.W.Bullfrog at gmail.com>
wrote:

> It is. btw, I'm an engineer.
>
>
> On Mon, Jun 16, 2014 at 9:36 AM, David Rossell <davidjohnrossell at gmail.com
> >
> wrote:
>
> > But some beans barely make a cracking sound at all, and others are quite
> > pronounced.  I swear, sometimes in the Behmor, it's not so much a crack
> as
> > a phht sound.  : )
> >
> > Could be a tough engineering problem!
> >
> >
> >
> >
> > On Mon, Jun 16, 2014 at 10:34 AM, Barry Luterman <lutermanb at gmail.com>
> > wrote:
> >
> > > Yes or to put it another way. You are measuring the actual event
> (crack)
> > > rather than a measure of a related event (temp) and then inferring
> about
> > > the evem from the measurement.
> > >
> > >
> > > On Mon, Jun 16, 2014 at 6:26 AM, Ben Treichel <J.W.Bullfrog at gmail.com>
> > > wrote:
> > >
> > > > Different purpose, since at best we measure the temp of the bean
> mass,
> > > and
> > > > at worst the input air temp, The sound of the crack indicates a
> > roasting
> > > > event, which is not necessarily temp dependent; time and time is a
> > better
> > > > indicator.
> > > >
> > > >
> > > > On Mon, Jun 16, 2014 at 8:15 AM, David Rossell <
> > > davidjohnrossell at gmail.com
> > > > >
> > > > wrote:
> > > >
> > > > >
> > > >
> > >
> >
> http://scitation.aip.org/content/asa/journal/jasa/135/6/10.1121/1.4874355
> > > > >
> > > > > Why that would be better than a thermometer to measure bean
> > > temperature,
> > > > > I'm not sure . . .
> > > > >
> > > > > David
> > > > >
> > > > > --
> > > > > David Rossell
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> >
> > --
> > David Rossell
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-- 
David Rossell


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