[tcb] Re: my horns broken

  • From: "Trey Jung" <treyjung@xxxxxxxxxxx>
  • To: <tcb@xxxxxxxxxxxxx>
  • Date: Fri, 15 Feb 2008 16:28:05 -0600

If I remember my math for every doubling of distance (say 3 feet to 6 feet and 6 feet to 12 feet) db level drops 3 db .....A 3 db drop in sound pressure is 1/2 as loud .... 


soooooo...
110 db at 3 feet is 107 db, at 6 feet 104 db and at 12 feet 101 db .... then you have to add a doubling of power to maintain db levels so in the below example if the train horn was being driven at 100 watts to get 110 db at 3 feet you'll need 200 watts to get the 110 db level at 6 feet .... 

Trey
----- Original Message ----- From: "Gerald V. Livingston II" <gerald.tcb@xxxxxxxxxxxxx> 
To: <tcb@xxxxxxxxxxxxx>
Sent: Friday, February 15, 2008 1:43 PM
Subject: [tcb] Re: my horns broken



The longest horn in that group is 16". Those aren't train horns. A train
horn is about 4 feet long.

Also, 152 decibels. Measured where? Inside the bell? The sound level will
drop off quickly coming out of a small horn.

Locomotive horns are limited to 96 - 110 decibels at 100 feet in front of
the train. The horn opening is over 12" in diameter so 110 decibels inside
the bell is probably still very close to 110 decibels at 100 feet. With the 3 or 4 inch horn opening on those car horns 152 decibels inside the horn is 
probably under 80 by the time you get to 100 feet. Possibly even legal.
Most air horns for cars that I see advertised claim 118 decibels which
would still be "louder" than a train horn. No way they are measuring at 100 
feet like the rail laws require.

Yes, bored but too busy to get any substantial work done. Took me 40
minutes to write this between phone calls.

G2

On Fri, 15 Feb 2008 12:54:37 -0600 Brian Denning
<i_am_cool_fred@xxxxxxxxxxx> wrote:



only if you "use" it
i live next to some train tracks too....aw man that would be fun

Date: Fri, 15 Feb 2008 10:48:57 -0800
From: mechmark@xxxxxxxxxxxxx
Subject: [tcb] Re: my horns broken
To: tcb@xxxxxxxxxxxxx

Those are just "Slightly" illegal!
Brian Denning <i_am_cool_fred@xxxxxxxxxxx> wrote: how about one of these? 

http://209.61.145.93/category_s/70.htm
that will really get the attention of the folks that pull out in front of me
Climb to the top of the charts! Play the word scramble challenge with star power. Play now! 





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