When our dogs bark we interrupt them by making a noise such as shaking a bottle with some pebbles in, but we're not always in the room. Is there some kind of device that makes a noise (maybe a loud white noise whooshing sound or something ultrasonic perhaps) that can be remotely controlled with a key fob type thing? A wireless doorbell would be perfect, but it would have to sound like an unpleasant alarm going off, not like a doorbell, otherwise they'd just bark at that too