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<blockquote data-quote="Robert Wooden" data-source="post: 218748" data-attributes="member: 17251">Thanks for the reply, Carl.You are correctly interpreting my un-educated (sound knowledge) descriptions. I am in unknown territory when it comes to sound deadening/absorption. The idea is to reduce the noise the generator creates at ten (10) feet or so away, thereby reducing the noise pollution my neighbors are so politely tolerating. I believe (<a href="https://www.youtube.com/watch?v=4Y0Z_nGe1Vo&amp;t=303s" target="_blank">in this video I found</a>) the creator of the video&#039;s logic thought was if he could remove the frequency inside the box it will reduce the Db sound resonating through the box.My shed (box) construction plan match most of your points you expressed in your reply. I appreciate your suggestions. (I am still in design mode for now so it would be easy to make any needed changes.) The sound goal will be to get down to 50-60 decibels or quieter at a distance of 10 fett or so. Once the specific construction design needs are finalization I will discuss specific details in a later thread when I get the Helmholtz questions worked out. A massive amount of air (800-1200 cfm) needs movement through the &quot;box&quot; with air cooling inlets and outlets dampened by baffling.I am not sure what you meant by &quot;have a high Q if undamped&quot;, specifically the reference to &quot;Q&quot;, what is that, please?What is the better shape for the chamber rectangular or cylindrical?Does the chamber need to be lined with acoustic dampening material (i.e. insulation)?</blockquote>

[QUOTE="Robert Wooden, post: 218748, member: 17251"] Thanks for the reply, Carl. You are correctly interpreting my un-educated (sound knowledge) descriptions. I am in unknown territory when it comes to sound deadening/absorption. The idea is to reduce the noise the generator creates at ten (10) feet or so away, thereby reducing the noise pollution my neighbors are so politely tolerating. I believe ([URL='https://www.youtube.com/watch?v=4Y0Z_nGe1Vo&t=303s'][COLOR=rgb(41, 105, 176)]in this video I found[/COLOR][/URL]) the creator of the video's logic thought was if he could remove the frequency inside the box it will reduce the Db sound resonating through the box. My shed (box) construction plan match most of your points you expressed in your reply. I appreciate your suggestions. (I am still in design mode for now so it would be easy to make any needed changes.) The sound goal will be to get down to 50-60 decibels or quieter at a distance of 10 fett or so. Once the specific construction design needs are finalization I will discuss specific details in a later thread when I get the Helmholtz questions worked out. A massive amount of air (800-1200 cfm) needs movement through the "box" with air cooling inlets and outlets dampened by baffling. I am not sure what you meant by "have a high Q if undamped", specifically the reference to "Q", what is that, please? What is the better shape for the chamber rectangular or cylindrical? Does the chamber need to be lined with acoustic dampening material (i.e. insulation)? [/QUOTE]

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