ATAR Notes: Forum

VCE Stuff => VCE Science => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Physics => Topic started by: DisaFear on November 10, 2011, 09:23:44 pm

Title: Ports in Speakers - What do?
Post by: DisaFear on November 10, 2011, 09:23:44 pm

Hi,

Looked up speaker ports in the textbook, I still don't understand how they work.
Could someone give me a simple explanation? Are they just used to aid the hearing of low frequencies?

Thanks :)

Title: Re: Ports in Speakers - What do?
Post by: tridol on November 10, 2011, 09:48:01 pm

I've had some issues with baffles and ports myself. I believe ports are designed to allow out of phase sound from the back of the speaker to constructively interfere with sound from the front. As low frequencies diffract more, it helps to improve efficiency of low frequency woofers and the like (thus why they are nonexistant on tweeters)

Title: Re: Ports in Speakers - What do?
Post by: Lasercookie on November 10, 2011, 10:32:57 pm

As well as what tridol said, ports also screw up the resonance in the enclosure, preventing unwanted and unloved vibrations of the box.

Title: Re: Ports in Speakers - What do?
Post by: DisaFear on November 10, 2011, 10:34:48 pm

We wouldn't need to know how they work, would we? Just what they do?