I call bullshit. Run a spectrum analyzer on pretty much any online ad and you'll notice it brick walls at 12-16k. Any sort of compression and you'll never so much as hit 20k, which is the upper end of 'sonic.' You want ultrasonic? Guess what. You're now running at 96k or above because St. Nyquist shits all over you at half your clock speed - your 44.1kHz CD player is only good to 22.05KHz, for example, which is fine because you can't much hear above 18k anyway. Besides which the only people advertisers care about are the 13-25yo kids and their hearing isn't blown out the way everyone over 30's is. You REALLY think your online advertising is using a dog whistle to make your phone and your television work in league against you? Then you're either Andy Rooney or a venture capital firm. Fucking people. Sorry. 6th 16 hour day in a row and I just busted up the rest of my bushmills amongst the crew.