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Junior Varsity
Notching Out Modes
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<blockquote data-quote="Ivan Beaver" data-source="post: 137857" data-attributes="member: 30"><p>Re: Notching Out Modes</p><p></p><p></p><p></p><p>Here is a FUN and VERY DISTURBING test to do the next time you have a little bit of time.</p><p></p><p>Put a 50Hz sine wave into the system. It doesn't need to be loud-just a comfortable level.</p><p></p><p>Now walk around the room and notice the peaks and dips. THESE are the room modes. Make a note of where they are.</p><p></p><p>Now change the freq (not to anything within a 1/4 or multiple of the freq. So say 60 or 65Hz. Now walk around the room again.</p><p></p><p>Notice how the peaks and dips are in different places now.</p><p></p><p>It should bring a new case of questions and confusion.</p></blockquote><p></p>
[QUOTE="Ivan Beaver, post: 137857, member: 30"] Re: Notching Out Modes Here is a FUN and VERY DISTURBING test to do the next time you have a little bit of time. Put a 50Hz sine wave into the system. It doesn't need to be loud-just a comfortable level. Now walk around the room and notice the peaks and dips. THESE are the room modes. Make a note of where they are. Now change the freq (not to anything within a 1/4 or multiple of the freq. So say 60 or 65Hz. Now walk around the room again. Notice how the peaks and dips are in different places now. It should bring a new case of questions and confusion. [/QUOTE]
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