https://www.birdstreetbistro.com/blogs/parrot-blog/the-eight-loudest-parrots-that-make-great-pets#:~:text=In%20fact%2C%20cockatoos%20are%20generally,Potential%20Noise%20Level%3A%20135%20decibels. https://www.rdworldonline.com/trump-lifts-50-year-supersonic-ban-paving-way-for-3-5-hour-new-york-london-trips/ Sonic booms are 115 decibels. Cocktoos can get up to 135.