2
$\begingroup$

This question already has an answer here:

The B787 has these chevron-shaped teeth on the exhaust port of its engines to reduce noise.

https://upload.wikimedia.org/wikipedia/commons/6/6b/Toothed_exhaust_duct_covers_on_a_Boeing_787.jpg

And according to the answer to this question they will be incorporated into the new B737's

Can anyone explain how these work to reduce noise?

$\endgroup$

marked as duplicate by ratchet freak, Jan Hudec, Community Aug 10 '15 at 16:21

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • 1
    $\begingroup$ Ah, thanks. It's a dupe. Can the noise tag be added to the original. I didn't find it. $\endgroup$ – TomMcW Aug 10 '15 at 16:00