How does an air raid siren make such a loud noise without electricity? Make sure to watch Mark's video of the World's Largest Air Horn!: https://youtu.be/pFEB0chiuJA
Mark's channel here: https://www.youtube.com/user/onemeeeliondollars
What's the loudest sound you've ever heard?
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Mark's channel here: https://www.youtube.com/user/onemeeeliondollars
What's the loudest sound you've ever heard?
Thank you for watching our videos - we love you!
Follow us on Twitter: https://twitter.com/whatsinside
Follow us on Instagram: https://www.instagram.com/whatsinside
Like us on Facebook: https://www.facebook.com/whatsinsidethings
Filmed in 4k on this camera: http://amzn.to/1UnXI82
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