dlr
Seasoned Veteran
Last Activity: Yesterday, 10:56 PM
Joined: 09-28-2005
Location: Canton, MA
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Yes, but it will certainly also be very frequency dependent. I doubt that muffs do much to block vibrations through the skull, it doesn't cover much of... -
I've used Bose noise cancelling headphones for years, on commuter rail and airlines. Let's you easily listen to music/movies while travelling. Great for...Leave a comment:
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My thoughts as well.
dlr...Leave a comment:
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One thing I'm curious about. What does the impedance look like if you totally block the gaps? I'm curious because if there is so little change with the...Leave a comment:
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If you apply enough felt appropriately, you won't need to consider the off-axis while designing. Felt can smooth on- and off-axis well. Once you verify...Leave a comment:
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Since you do have felt, consider my suggestion to use it for design only. It will improve both the on-axis and off-axis. This will allow you to more easily...Leave a comment:
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Neoprene may be good for panel vibrations, but not for a baffle diffraction application. That name in the first article sounds familiar. It uses misinformation...Leave a comment:
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I doubt seriously that the neoprene will be a benefit. The sound waves needs to pass through the material and absorb some of it. It may also be that it...Leave a comment:
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Poor wording in my question, but yes, I was wondering if the grille is flush or not. Your test with the cardboard cutouts looks to be flush. A gap like...Leave a comment:
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That grill is positioned proud of the front baffle? There's a gap under it, that is?
dlrLeave a comment:
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I was as well, but was more surprised by the difference between WT and WTW. The "hole" in the power response below Fc is also very prominent,...Leave a comment:
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IIRC, D'Appolito moved to LR4 primarily due to the additional protection for the tweeter. But certainly more mids or woofers are then appropriate since...Leave a comment:
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I do agree with this. D'Appolito is MTM (WTW) with BW3 or LR4 and with driver separation within specific wavelength requirements for the desired Fc. First...Leave a comment:
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Here's one more graph. This is a comparison of the power response of the three systems, but with driver directionality turned off. It becomes a function...
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Vertical Heatmaps (Horizontal seems unnecessary):
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Vertical Surface Plots:
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Horizontal Surface Plots:
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The first and probably the most important graph is the power response overlay.
The tweeter rolloff is rather exaggerated. WinPCD uses...Leave a comment:
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I'm going to post a number of window captures of three different system models from WinPCD. They are:- 2Way MTM BW3 2000 WTW Inline - Adjusted Fc
- 2Way
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I'm modeling some in WinPCD now. Will include horizontal and vertical surface plots and calculated power response.
dlr...Leave a comment:
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