dBm

The hows and whys of running sound.
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Rune Bivrin
Posts: 521
Joined: Tue Aug 19, 2008 5:42 pm
Location: Stockholm, Sweden

Re: dBm

#16 Post by Rune Bivrin »

BrentEvans wrote: The thing that's really funny is that most Customary measurements have now been defined in terms of the metric system. For instance, the official definition of a pound is (roughly) 2.2kg. The kilogram is in turn defined by a specific chunk of metal in France, stored in a vault... whose mass seems to change over time for some reason....
I think you managed to get that bass ackwards. One kg is ~2.2lb, one lb is ~0.454 kg.
BrentEvans wrote: I'm all screwed up, apparently. :noob:
But this you got completely right :fruit:
In build order:
O12 with no tweeter.
3 x WedgeHorns.
2 x Jack 10 without tweeters.
2 x DR250.
2 x 16" T39
1 x Tuba 24
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BrentEvans
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Location: Salisbury, NC

Re: dBm

#17 Post by BrentEvans »

Rune Bivrin wrote: I think you managed to get that bass ackwards. One kg is ~2.2lb, one lb is ~0.454 kg.


Yes... OK... :wall:
But this you got completely right :fruit:
Thanks. I needed that. :owned:
99% of the time, things that aren't already being done aren't being done because they don't work. The other 1% is split evenly between fools and geniuses.

billkatz
Posts: 249
Joined: Mon Jan 21, 2013 9:30 pm
Location: San Rafael, CA

Re: dBm

#18 Post by billkatz »

byacey wrote:
escapemcp wrote: I know Bm isn't a measure! :lol: )
Actually, it is a valid measure. The base unit is the Bel (you probably guessed it - from the Bell Telephone Labs)
Actually it is named after the man, Alexander Graham Bell, and hence why it is capitalized, like other unites named after people (Farad, Ohm, Ampere, etc.) as opposed to units that are not named after people that are lower case (second, meter, etc.)
Built:
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Hackomatic
Posts: 400
Joined: Thu Jun 25, 2009 8:11 am
Location: West TN

Re: dBm

#19 Post by Hackomatic »

I have a friend who works at Kohler and he said Bm is the unit of measurement their engineers use when designing toilets . . .
Dave H

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DJPhatman
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Re: dBm

#20 Post by DJPhatman »

Hackomatic wrote:I have a friend who works at Kohler and he said Bm is the unit of measurement their engineers use when designing toilets . . .

Peeeeeeeee-Uuuuuuuuuuuuuuuuuuu!


:P
I know money often seals the deal, but seriously, quality is an investment, not an expense... Grant Bunter
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BrentEvans
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Re: dBm

#21 Post by BrentEvans »

DJPhatman wrote: Peeeeeeeee-Uuuuuuuuuuuuuuuuuuu!
No.. that's a postsecondary educational institution that's near my house. It used to be Pfeiffer College. Then they became a university. Bunch of nutty academics probably didn't realize what they were doing.

Kind of like Friends University . You know.. the one in central Kansas. The Friends University of Central Kansas.

:wall:
99% of the time, things that aren't already being done aren't being done because they don't work. The other 1% is split evenly between fools and geniuses.

byacey
Posts: 947
Joined: Thu Jun 14, 2012 9:09 am
Location: Edmonton, Alberta, Canada

Re: dBm

#22 Post by byacey »

billkatz wrote:
byacey wrote:
escapemcp wrote: I know Bm isn't a measure! :lol: )
Actually, it is a valid measure. The base unit is the Bel (you probably guessed it - from the Bell Telephone Labs)
Actually it is named after the man, Alexander Graham Bell, and hence why it is capitalized, like other unites named after people (Farad, Ohm, Ampere, etc.) as opposed to units that are not named after people that are lower case (second, meter, etc.)
That's where Bell Telephone Labs got their name. It was a group of engineers there that implemented the measurement unit Bel. It replaced an earlier measurement called a TU or Transmission Unit in the 1920's.

You can read about it here:http://en.wikipedia.org/wiki/Decibel

Many of the things we take for granted today were developed in the Bell Telephone Labs, transistors, fiber optics, multiplexing, etc...
Built
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billkatz
Posts: 249
Joined: Mon Jan 21, 2013 9:30 pm
Location: San Rafael, CA

Re: dBm

#23 Post by billkatz »

byacey wrote:
billkatz wrote:
byacey wrote: Actually, it is a valid measure. The base unit is the Bel (you probably guessed it - from the Bell Telephone Labs)
Actually it is named after the man, Alexander Graham Bell, and hence why it is capitalized, like other unites named after people (Farad, Ohm, Ampere, etc.) as opposed to units that are not named after people that are lower case (second, meter, etc.)
That's where Bell Telephone Labs got their name. It was a group of engineers there that implemented the measurement unit Bel. It replaced an earlier measurement called a TU or Transmission Unit in the 1920's.

You can read about it here:http://en.wikipedia.org/wiki/Decibel

Many of the things we take for granted today were developed in the Bell Telephone Labs, transistors, fiber optics, multiplexing, etc...
Yes - and the lobby of the main Bell Labs building in Murray Hill (now Alcatel-Lucent) has an amazing display in its lobby showing all the things they've developed.
Built:
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