[Lab] "listening" to high volume using an electret microphone

[Justin Slootsky]

Bingo!  I can easily drive my home stereo above 90db.
Time to investigate sound insulation.  In a small light package.  
Sounds like styrofoam or bubble wrap is in order.

----- Original Message -----
| From: "Peter Sjoberg" <lpaseen at gmail.com>
| To: lab at artengine.ca
| Sent: Tuesday, May 6, 2014 4:24:32 PM
| Subject: Re: [Lab] "listening" to high volume using an electret microphone
| 
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| On 05/06/2014 12:45 PM, Richard Sloan wrote:
| > pot on output will just limit the now clipped signal, need to adjust the
| > gain of the amp itself, so the output never clips.....
| I kind of wonder what the electret microphone can handle. Did see the
| datasheet but don't know how to convert 85dB sound pressure (or whatever
| you expect to get) to something on the datasheet but it must be a max
| somewhere. If you hit that max it doesn't matter what you do at opamp
| level, it's already clipped before it hits it.
| 
| /ps
| 
| > 
| > On Tue, May 6, 2014 at 10:13 AM, Justin Slootsky <justin at slootsky.org
| > <mailto:justin at slootsky.org>> wrote:
| > 
| >     Yes, at the 40db setting, it still drives too high.  Maybe I should
| >     just put a pot on the output and see how that goes.
| > 
| >     ------------------------------------------------------------------------
| > 
| >         *From: *"greg atcheson" <greg.atcheson at gmail.com
| >         <mailto:greg.atcheson at gmail.com>>
| >         *To: *"Justin Slootsky" <justin at slootsky.org
| >         <mailto:justin at slootsky.org>>
| >         *Cc: *"lab" <lab at artengine.ca <mailto:lab at artengine.ca>>
| >         *Sent: *Tuesday, May 6, 2014 9:46:27 AM
| >         *Subject: *Re: [Lab] "listening" to high volume using an
| >         electret microphone
| > 
| > 
| >         Have you tried using the other lower-gain setting jumpers
| >         mentioned in the link? If it was a standard opamp I'd say put a
| >         potentiometer in for the gain and you can adjust it.
| > 
| >         On May 6, 2014 8:10 AM, "Justin" <justin at slootsky.org
| >         <mailto:justin at slootsky.org>> wrote:
| > 
| >             I'm working on a "light organ" type project, and I tried
| >             this http://adafru.it/1713 and it worked great until I got
| >             to high home stereo volume, then everything was maxed out.
| >              Since my target environment is an indoor concert venue, I
| >             need to use something with less amplification.
| >             I have a bare electret microphone, but I'm having trouble
| >             finding information on how to use it in a high volume
| >             environment.
| >             Does anyone have any links or suggestions?
| > 
| > 
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| > 
| > 
| > 
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| > 
| > 
| > 
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