Cancelling a yell?

jb_007clone · February 10, 2003, 2:29am

First let me start off by saying that I know nothing about this sort of thing. Here goes anyway:

I know that in order to cancel a noise you need to send out a signal opposite to it, but could this be done for a yell? In theory could someone yell an opposite “signal” to my yell and cancel it out?

samclem · February 10, 2003, 3:35am

You know this HOW?

don_t_ask · February 10, 2003, 3:40am

Like this perhaps but on a bigger scale.

jb_007clone · February 10, 2003, 3:44am

exactly.

Rick · February 10, 2003, 3:52am

Well you could build a Fenton Silencer

I_can_t_believe_that_s_butter · February 10, 2003, 4:19am

So, that’s the same phenomenon at work when you see a radio station sending a directional signal with an array of towers, right?

Evil_Captor · February 10, 2003, 5:30am

Or stick with the good 'ol Cone of Silence from ‘Get Smart’.

Lobsang · February 10, 2003, 6:32am

You know - I could swear I posted to this thread! something about silencers for car engines.

maybe there is a way of cancelling out posts with anti-posts.

Jeff41 · February 10, 2003, 8:46am

You’d have to play a sound of the same frequency originating from the same location (your mouth) and time it to get the sound waves 180 degrees out of phase. Figure out how to do that, and you can scream your head off all day and not be heard by anyone