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

Ben Treichel J.W.Bullfrog at gmail.com
Mon Jun 16 11:34:53 CDT 2014


Yep, humans(normally) can tell the difference between the sound of a 1st,
or 2nd crack.


On Mon, Jun 16, 2014 at 9:56 AM, David Rossell <davidjohnrossell at gmail.com>
wrote:

> 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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