Noisy Jackhammer Man: Special Headphones Allow Conversation

[zachcumer]

Noisy Jackhammer man...has special headphones so he can hear you, you cannot hear him

My physics teacher wants us to answer this "A special device can transmit out-of-phase sound from a noisy jackhammer to earphones worn by its operator. Over the noise of the jackhammer, the operator can easily hear your voice while you are unable to hear his, Explain." Now I thought the headphones focused in on a persons voice and canceled the jackhammer...?

 

[zachcumer]

Hello?

 

[zachcumer]

Hello? Anyone There?

 

[chroot]

Uh.. the noise is canceled at his ears, not yours.

- Warren

 

[zachcumer]

thanks