I can sympathize with you. Low frequency can even make concrete vibrate. Tough to fight but there are some things that can be done to help reduce it. Of course the quickest and cheapest way is to get the cops to help but no way here.
I would start with those wood frame single pane windows. If you can afford it, put on some outside or inside storm windows. These are great for insulating against sound even better than thermopane windows because they insulate the whole frame. Sound transfers through wood quite well.
If the exterior walls are not insulated, this insul-board you have could be used but whether you use it on the inside or outside, you have the problem or expense of putting a finish over it. You could start by putting it on the wall closest to the noise.
WIsh I had some easier suggestions for you.
Good luck!
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Bart Blainey, B.E.R.
Consultant/Journeyman Carpenter
Building Envelope Specialist
Master Renovator
provip@prodeck.org
http://www.prodeck.org
Barton Blainey (provip) specifically assumes no legal liability or responsibility for the accuracy, completeness or usefulness of any information or process disclosed. The above further expressly advises that any use of or reliance upon the information and or opinion disclosed is at your risk .
_________________________
Bart Blainey, B.E.R.
Consultant/Journeyman Carpenter
Building Envelope Specialist
Master Renovator
provip@prodeck.org
http://www.prodeck.orgBarton Blainey (provip) specifically assumes no legal liability or responsibility for the accuracy, completeness or usefulness of any information or process disclosed. The above further expressly advises that any use of or reliance upon the information and or opinion disclosed is at your risk .