Even better, any old round plastic trash bin can be cut out into a rounded dish that when turned around will reflect the beam, and it can also be held like a riot shield to protect against projectiles!

(do keep in mind that most jurisdictions would consider you deliberately reflecting an LRAD to be an assault against the officers, and would literally throw you in jail for it, though curiously it’s not bad when they do it directly to you, just not when you defend yourself. Who would have thought?)