this has been posted before but it is very relevant today
tl,dw: cheap hardware store over-ear protection works pretty well; a plexiglass riot shield plus ear protection works great; a curved riot shield can be used inverted to direct the sound pressure back at the operator.
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I wonder if you could make an acoustic version of One of these engineered to deflect LRAD frequencies right back to their source
I found a YouTube link in your post. Here are links to the same video on alternative frontends that protect your privacy:
