HomeRoast Digest


Topic: follow up on IR2 and noise cancelling headphones (8 msgs / 282 lines)
1) From: seth Grandeau
I have to say, I continue to be pleased with my cheap Sony NC headphones.  =
I have nailed the last two IMV roasts, stopping them just as first crack en=
ded.  And, today, I roasted some Aged Sumatra, which I wanted to take into =
second crack.  I heard first crack start, clear as can be.  I heard a "roll=
ing" first crack and I heard the end of first crack.  Then, I heard second =
crack start (first time I've ever heard it clearly).  I heard a "rolling" s=
econd crack.  I heard second crack start to slow.  I then smelled smoke and=
 hit the cool down button.  OK, that part was my bad, but now I know I can =
hear second crack and I can bail out at the beginning to get a FC or FC+, r=
ather than waiting for the telltale smoke.For those having troubles with he=
aring their IR2, particularly the person starting the "I'm giving up" threa=
d, pick up a cheap pair of NC headphones and give it a try.  It doesn't kno=
ck out the fan sounds, but it reduces it enough that the cracks can be easi=
ly heard.
 
Good luck to all!
 
-Seth
Share life as it happens with the new Windows Live.Download today it's FREE=
!http://www.windowslive.com/share.html?ocid=TXT_TAGLM_Wave2_sharelife_1120=07=

2) From: Tom & Maria - Sweet Maria's Coffee
Really interesting - I read this thread earlier, and just remember 
how many times we have been through the same issue on this list: "I 
can't hear the cracks". I don't think it ever occurred to anyone to 
use noise cancelling headphones back then. (Well, to be fair, they 
weren't cheap a few years back either)
Tom
I have to say, I continue to be pleased with my cheap Sony NC 
headphones.  I have nailed the last two IMV roasts, stopping them 
just as first crack ended.  And, today, I roasted some Aged Sumatra, 
which I wanted to take into second crack.  I heard first crack start, 
clear as can be.  I heard a "rolling" first crack and I heard the end 
of first crack.  Then, I heard second crack start (first time I've 
ever heard it clearly).  I heard a "rolling" second crack.  I heard 
second crack start to slow.  I then smelled smoke and hit the cool 
down button.  OK, that part was my bad, but now I know I can hear 
second crack and I can bail out at the beginning to get a FC or FC+, 
rather than waiting for the telltale smoke.
For those having troubles with hearing their IR2, particularly the 
person starting the "I'm giving up" thread, pick up a cheap pair of 
NC headphones and give it a try.  It doesn't knock out the fan 
sounds, but it reduces it enough that the cracks can be easily heard.
Good luck to all!
-Seth
Share life as it happens with the new Windows Live. 
Share 
now!
--
                   "Great coffee comes from tiny roasters"
            Sweet Maria's Home Coffee Roasting  -  Tom & Maria
                      http://www.sweetmarias.com                Thompson Owen george_at_sweetmarias.com
     Sweet Maria's Coffee - 1115 21st Street, Oakland, CA 94607 - USA
             phone/fax: 888 876 5917 - tom_at_sweetmarias.com

3) From: Stan Armstrong
Seth, I must be missing something here. I checked the archives, but I =
cant
figure out what makes this work. Surely, in addition to the headphones =
you
must have some sort of microphone pickup. Then you need an amplifier. Or =
am
I missing something? Do the headphones work to cancel noise even when =
they
have no signal input? If not, what equipment are you using?
	
From: homeroast-admin
[mailto:homeroast-admin] On Behalf Of seth =
Grandeau
Sent: Wednesday, December 05, 2007 3:10 PM
To: homeroast
Subject: +follow up on IR2 and noise cancelling headphones
I have to say, I continue to be pleased with my cheap Sony NC =
headphones. I
have nailed the last two IMV roasts, stopping them just as first crack
ended. And, today, I roasted some Aged Sumatra, which I wanted to =
take into
second crack. I heard first crack start, clear as can be. I heard =
a
"rolling" first crack and I heard the end of first crack. Then, I =
heard
second crack start (first time I've ever heard it clearly). I heard a
"rolling" second crack. I heard second crack start to slow. I then =
smelled
smoke and hit the cool down button. OK, that part was my bad, but now =
I
know I can hear second crack and I can bail out at the beginning to get =
a FC
or FC+, rather than waiting for the telltale smoke.
For those having troubles with hearing their IR2, particularly the =
person
starting the "I'm giving up" thread, pick up a cheap pair of NC =
headphones
and give it a try. It doesn't knock out the fan sounds, but it =
reduces it
enough that the cracks can be easily heard.

Good luck to all!

-Seth
Share life as it happens with the new Windows Live. Share now!

4) From: Taso Lyristis
Noise canceling headphones actually have mics on them that pick up the
ambient noise, then generate the "opposite" sound, which in theory cancels
out the noise.  In reality you can still hear the background noise, but it's
drastically reduced.
If case you're wondering, yes, this kind of headphone requires batteries.
On Dec 5, 2007 4:14 PM, Stan Armstrong  wrote:
<Snip>

5) From: raymanowen
My daughter, Sarah, brought me a pair of these from The Sharper Image she
manages. They're similar in appearance to the "Mickey Mouse" hearing
protectors, but it is Dead Silent when you have these things on.
It would probably wreck them to go out shooting while wearing them- the
sound pressure wave, among other things from gunfire can be pretty intense
that close up. The active microphone might holler "Uncle!" with every round.
I'm going to try them the next time I roast. Tomorrow, even if it's snowing
in Denver Town. It'll just be an experiment- I've never had trouble hearing
the cracks. I get a kick out of standing on the brakes and stopping a roast
dead cold just when it gets into a ripping 2nd Crack.
Cheers, Mabuhay -RayO, aka Opa!
Got Grinder?
On Dec 5, 2007 5:37 PM, Taso Lyristis  wrote:
<Snip>

6) From: Allon Stern
On Dec 6, 2007, at 12:30 AM, raymanowen wrote:
<Snip>
A friend of mine has active hearing protection - it's basically a set  
of muffs that block out all sound, with a built-in microphone/amp/ 
speakers that lets you hear what's going on around you - when there  
is a loud noise, they turn it down. Basically an audio compressor  
with a very fast attack time and pretty fast release. So you can hear  
the instructor in between shots....or your buddy in between blasts  
from the nail gun. Not useful for roasting, though.
FWIW, I used my pair of shooting muffs as protection from the 100dB  
iRoar this evening. I held my ears right up to the roaster, hoping  
that maybe the snaps wouldn't be as attenuated as the roar (the muffs  
don't have a linear resonse) but I still was unable to hear any cracks.
The iRoast has been nice for getting the coffee roasted, but I miss  
using my hot-air popper. When the weather gets warmer, I'll probably  
pull it out again. It was easy to hear the cracks with it. But then  
again, watching the beans is a lot harder. The iRoast lets you put  
your eye right up to the glass.
Visual versus sonic feedback.
<Snip>
Nice. Just curious, does it really matter how fast you can bring the  
roast to a halt? Is faster necessarily better? Hey, LN2 quench, here  
we come :)
-
allon

7) From: raymanowen
My wife was an RN when we got married, and used to have several operational
stethoscopes. Edith, Sarah and Daniel had been practiced on and practiced o=
n
each other a lot by middle school. The replacements were decent instruments
in the $20 price range, but she bought them and IIRC does not apply. IPDRC
(I probably don't RC...)
I've never tried a stethoscope- never needed augmentation. 1st Crack is lik=
e
popcorn or a string of firecrackers going off, compared to the Rice Crispie=
s
snap- crackle- pop of 2nd.
A whole world of flavor opened up, especially when I started using a Heat
Gun on 1# of beans in a deep Kitchen Aid mixer bowl. I had realized that I
was getting tremendous flavors in the FR or poppers when I'd let the roast
just get to the edge of 2nd Crack.
One early morning, I was using a popper outside in a vacant microwave
cabinet. The air temperature was 13F. The roast was easy to control in t=
he
cabinet just by setting the door opening. Closed, and it would heat up fast=
;
Wide open to the 13 air, and the temperature came down.
Stopping the roast was a cinch in the frigid air, pouring the beans between
a salad bowl and a mesh colander.
Substitute a very large air flow for very low temperature. I saw blowers in
furnaces being dumped into a metal dumpster. I managed to stop the guy on
the forktruck before he put the last one in the dumpster. $2 for the blower=
,
I pull it out of the furnace. Phew! I made it to the Bronco in about two
steps and grabbed the 5/16 and 1/4 inch nutdrivers.
Four screws and four wires and it slid right out. 120v PSC 3-speed direct
drive motor. Pristine. Not one speck of dust.
"Did I want any more?"
No.
Why, oh Why did I say that?
The Bronco was full of $125 worth of dog, cat, rabbit and bird food.
Passenger and back seats could have held one blower each, but the Babbit
brain has a rather slow clock. I really need another thing in the house.
Drat! And a few other colorful metaphors. Check your local metal recycler.
Storage in fruit jars is good, as is flash freezing in a ZipLoc sandwich ba=
g
the quantity you want to grind and brew.
Cheers, Mabuhay -RayO, aka Opa!
Don't let Dummkopf interfere with your coffee
On Dec 5, 2007 10:41 PM, Allon Stern  wrote:
<Snip>

8) From: seth Grandeau
Exactly right.  The set I use look like regular headphones, but with an ext=
ra small "pod" that holds the battery and the electronics.  They cancel out=
 the "steady" sounds, like the roar of the fan, but they let "sharp" sounds=
, like the cracks go through.  Bose makes some wonderful (and expensive) se=
ts, that work fantastically well.  I have a $20 set from Sony that I found =
on sale, on-line.  I still hear the fan, but it's quieted enough that the c=
racks are easier to hear.
 
Date: Wed, 5 Dec 2007 16:37:35 -0800From: "Taso Lyristis"  wrote: =
<Snip>
n't> figure out what makes this work. Surely, in addition to the headphones=
 you> must have some sort of microphone pickup. Then you need an amplifier.=
 Or> am> I missing something? Do the headphones work to cancel noise even w=
hen they> have no signal input? If not, what equipment are you using?>>
Share life as it happens with the new Windows Live.Download today it's FREE=
!http://www.windowslive.com/share.html?ocid=TXT_TAGLM_Wave2_sharelife_1120=07=


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