We work together <a href=" http://www.buscadichos.com/statistics-probability-problems#consequences ">essay on a modest proposal</a> Realistically, this isn&rsquo;t going to happen. Ultrasonic devices are marketed to stop dogs barking: the loud high-pitched noise produced by pressing the button is inaudible to humans but heard by dogs, and this can be enough to startle them into silence. However, reported success rates are not great. A better approach may be to buy yourself noise-cancelling headphones and an MP3 player, drowning out the annoying barking with pleasant background music.