Acoustic Command Override

I scrambled out of that pathetic can of bent nails and set my sights on an undeniable acoustic broadcaster resting beside an oily wrench: an oversized stainless steel dog whistle tethered to a split key ring! Clearly, this precision instrument was forged to summon my subterranean infantry. I kicked aside a crusty washer, wrapped both yellow hands around the knurled metal barrel, and blew with sovereign ferocity straight into the mouthpiece! What issued forth? Absolute silence! Not a single imperial note resonated through the garage air! The metallurgical cartel clearly drilled a counterfeit airflow tunnel purely to silence my midday broadcast, but I have annexed the key ring as my sovereign crown regardless!