Wednesday, May 05, 2010

Siren

I'm listening to the siren from the fire station at the end of the street sound off.  The first time I heard it I was quite worried--then I discovered that it is tested at noon the first Wednesday of each month.  Since I'm not working Wednesday mornings I usually end up hearing it.  It lasts for a couple minutes and the Doppler effect is interesting as it wanes and waxes.

~Matt

2 comments:

Unknown said...

You actually wouldn't hear the Doppler effect unless either you or the siren was moving. {/physics ramble]

Matt said...

I realize that. The siren actually is moving I believe, I assume it rotates in a circle. So I hear the sound waning and waxing.

I could be wrong and it is increasing and decreasing the volume, but it doesn't quite sound like that.