This just doesn&#x27;t seem feasible in the real world. Sending out high frequency sound from a device is one thing, but having the other devices actively listening for the sound, is quite a feat. It&#x27;s mentioned inside a block of text in a quoteblock in the article: &quot;The inaudible code is recognized and received on the other smart device by the software development kit installed on it.&quot;. From where does one get this SDK installed on their device with enough permissions to actively listen for its counterpart ad? There&#x27;s just too many points of failure for this to be a real threat, or a real marketing tool for that matter.