[nSLUG] Inexpensive decibel meter for a project?

Joel Maxuel j.maxuel at gmail.com
Thu Jan 8 14:04:01 AST 2015

Thanks again Dave,

I found comparable products on Amazon.ca and forwarded them off to my lead
on this project.  I thought about this while looking up an Arduino
solution, and that is to even if you build one on the cheap, you would
still need to buy (or borrow) a decibel meter to calibrate it.

We will see what Karen comes back with - the <30dB hole might not even be a
problem, and we could use similar to what you initially pointed out.

Joel Maxuel

"One should strive to achieve, not sit in bitter regret."
 - Ronan Harris / Mark Jackson

On Thu, Jan 8, 2015 at 1:51 PM, Dave Flogeras <dflogeras2 at gmail.com> wrote:

> On Thu, Jan 8, 2015 at 1:34 PM, Joel Maxuel <j.maxuel at gmail.com> wrote:
> > Windows drivers are okay, even preferred, as that is the kind of
> ecosystem
> > at the hospital.
> >
> > Sensitivity might be an issue as the literature suggests optimum sleeping
> > decibels is no more than 25 to 30 dB where this one starts at 30 dB.
> > Something that has a low end of 20 and a top of say, 100, is probably
> where
> > we want to be.
> >
> > Finally, I do notice as with this posting, that they may not ship to
> Canada.
> >
> > Thank you for giving me another twist in my scope though.
> >
> That ebay post was just an example, I'm guessing there are many to choose
> from.
> If time wasn't a factor, I'd be happy to donate some time to help make
> up a custom solution.  I've been playing around with microcontrollers
> in my spare time, and it would be feasible to make a tiny battery
> operated sensor with a microphone capable of sensing sound levels.
> Then in software you could process/average/calibrate it and send it
> over usb or bluetooth to a laptop for logging (bluetooth could mean
> you could put the laptop in a locked drawer out of harms way).
> I've done various bits of this all before, but it would take time to
> develop on the cheap (parts and boards can be acquired cheaply, but
> slowly), and possible a few iterations.  Then some lab testing against
> a calibrated sound meter to adjust the sensitivities.
> Could open source the software and hardware and let other people
> benefit as well.
> Again, probably a huge stretch that would take wayy more personal
> investment, and possibly even cost more (even on the cheap), but hey
> if you're looking for a fun project over the winter....
> D
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