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<p>In that case just be a bit cautious as different materials affect different frequencies. I am currently working on a home theater and had recently looked at acoustic insulation which has specs published and in some cases even validated by a 3rd party. In most cases it will attenuate 150 Hz at a much different rate than 2000-3000 Hz. In other-words bass will be less likely to be attenuated than higher frequencies.</p>
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<p><span style="font-family: 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif; font-size: 12px;">Still worth a shot though. Good luck</span></p>
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<p>On 2014-05-06 4:35 pm, Justin Slootsky wrote:</p>
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<div>Thank you! This is a good option as well.</div>
<div>I don't have a high requirement for accuracy, I'm just breaking it down into 7 frequency bands (using the MSGEQ7 chip) and displaying those. A small case for the microphone might be a great answer.</div>
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<blockquote style="border-left: 2px solid #1010FF; margin-left: 5px; padding-left: 5px; color: #000; font-weight: normal; font-style: normal; text-decoration: none; font-family: Helvetica,Arial,sans-serif; font-size: 12pt;"><strong>From: </strong>dave@huntgang.com<br /><strong>To: </strong>lab@artengine.ca<br /><strong>Sent: </strong>Tuesday, May 6, 2014 4:34:14 PM<br /><strong>Subject: </strong>Re: [Lab] "listening" to high volume using an electret microphone<br />
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<p>Thinking outside the box (or microphone in this case) what about attenuating the sound before it gets to the microphone? ie using something like insulation around the microphone to reduce the sound level? Could be a very simple solution, not sure what type of accuracy you are looking for.</p>
<p>On 2014-05-06 4:24 pm, Peter Sjoberg wrote:</p>
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On 05/06/2014 12:45 PM, Richard Sloan wrote:</pre>
<blockquote style="padding-left: 5px; border-left: #1010ff 2px solid; margin-left: 5px; width: 100%;">pot on output will just limit the now clipped signal, need to adjust the gain of the amp itself, so the output never clips.....</blockquote>
<pre>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</pre>
<blockquote style="padding-left: 5px; border-left: #1010ff 2px solid; margin-left: 5px; width: 100%;">On Tue, May 6, 2014 at 10:13 AM, Justin Slootsky <<a href="mailto:justin@slootsky.org">justin@slootsky.org</a> <mailto:<a href="mailto:justin@slootsky.org">justin@slootsky.org</a>>> 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" <<a href="mailto:greg.atcheson@gmail.com">greg.atcheson@gmail.com</a> <mailto:<a href="mailto:greg.atcheson@gmail.com">greg.atcheson@gmail.com</a>>> *To: *"Justin Slootsky" <<a href="mailto:justin@slootsky.org">justin@slootsky.org</a> <mailto:<a href="mailto:justin@slootsky.org">justin@slootsky.org</a>>> *Cc: *"lab" <<a href="mailto:lab@artengine.ca">lab@artengine.ca</a> <mailto:<a href="mailto:lab@artengine.ca">lab@artengine.ca</a>>> *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" <<a href="mailto:justin@slootsky.org">justin@slootsky.org</a> <mailto:<a href="mailto:justin@slootsky.org">justin@slootsky.org</a>>> wrote: I'm working on a "light organ" type project, and I tried this <a href="http://adafru.it/1713">http://adafru.it/1713</a> 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? _______________________________________________ Lab mailing list 1. subscribe <a href="http://artengine.ca/mailman/listinfo/lab">http://artengine.ca/mailman/listinfo/lab</a> <<a href="http://artengine.ca/mailman/listinfo/lab">http://artengine.ca/mailman/listinfo/lab</a>> 2. then email <a href="mailto:Lab@artengine.ca">Lab@artengine.ca</a> <mailto:<a href="mailto:Lab@artengine.ca">Lab@artengine.ca</a>> to send your message to the list _______________________________________________ Lab mailing list 1. subscribe <a href="http://artengine.ca/mailman/listinfo/lab">http://artengine.ca/mailman/listinfo/lab</a> 2. then email <a href="mailto:Lab@artengine.ca">Lab@artengine.ca</a> <mailto:<a href="mailto:Lab@artengine.ca">Lab@artengine.ca</a>> to send your message to the list _______________________________________________ Lab mailing list 1. subscribe <a href="http://artengine.ca/mailman/listinfo/lab">http://artengine.ca/mailman/listinfo/lab</a> 2. then email <a href="mailto:Lab@artengine.ca">Lab@artengine.ca</a> to send your message to the list</blockquote>
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