Call the new engine by its proper name!

[Driftwood Ram]

Echo,Echo

If I had wanted QUIET I would have gotten a gasser.

 

[Animal]

Originally posted by Diesel Dually

In the RF (radio frequency) world a 3dB change will double or halve



In the VF (voice frequency) world a 10dB change is required to double or halve.



I believe the new truck will be about half as loud as the current STOCK truck

This is incorrect; the different between RF (radio frequency) and VF (voice frequency) is the reference point. Basically 0 DB (VF) is referenced at 1 watt, and 0 DBm (RF) is referenced at 1 milliwatt. The incremental ratio for both is the same; 1 DB of increase is a 26% increase, 2 DB = 59%, 3 DB = 100%. When you change in 10 DB increments, 10 DB = 10 times as much power, 20 DB = 100 times more, 30 DB = 1000 times more, etc.

 

[JSchooley]

Hey Animal - you been chasen too many bears.



Previous post was even worse.



Db is a power ratio. -3 dB is 1/2 power. -6 dB is 1/2 of 1/2 or 1/4 power. -9 dB likewise is 1/8 power and -10 dB is 1/10 power. It doesn't matter whether it is RF, sound, wave or hot air.



When you see dBm or dBW, the power ratio is in reference to a set value such as milli-watts or Watts.



Confusion sets in when talking about sound since ears are very non-linear and the perception of loudness is very different than the actual sound power. Never the less, 10 dB reduction in sound would make me able to hear the radio again. It is an awsome reduction and your going to need to record your current engine and play it back through a boom box to get your satisfaction out of this new baby.

 

[Animal]

Same but different

JSchooley,



I agree with everything you just wrote and if look real carefully you’ll see we both said the same think, only you subtracted DB’s and I added them.



DBm is referenced at milliwatts, 0 dbm = 1 milliwatt.

DBw is referenced at watts, 0 dbm = 1 watt.



DBw =... ... ... ... ... ... ... ... ... ... ... ... ... DBm =



0 = 1 watts... ... ... ... ... ... ... ... ... ... . 0 = 1 milliwatts

10 = 10 watts... ... ... ... ... ... ... ... ... 10 = 10 milliwatts

20 = 100 watts... ... ... ... ... ... ... ... . 20 = 100 milliwatts



So if we do it your way 20 dbw = 100 watts and subtracting 10 db you get 10 watts, which is 1/10 the power.



Doing it my way 10 db = 10 watts and adding 10 db you have 100 watts, 10 times the power.



I’m a Radar technician and do this for a living every day for the last 25 years. We both said the same think but in Radar we never subtract db’s to determine our power output we always add.

 

[R.E. Miller]

Hey, anyway, I heard that it was just going to be called the ISBE for all of the transistors that it has Serious, "E" for electronic? Where did the "Echo" come from? Besides, take out the muffler, particulate filter, cat, break the law, and I bet it's exhaust note will sound quite similar to that of the 24v .



Russell

 

[Steve St.Laurent]

My guess is that Echo came from the phonetic alphabet.

 

[jwilliams3]

I dont know who came up with the name.

I would say it goes along with it being a quiet engine, and

Electronic Commonrail High Output?

 

[Chris N5CWM]

I agree with Steve..

Originally posted by Steve St. Laurent

My guess is that Echo came from the phonetic alphabet.

The tacked on E behind ISB probably

led to someone referring to the new

Cummins as the ISB Echo. Phonetically,

it's alpha, bravo, charlie, delta, echo,

foxtrot etc...



-Chris

 

[Diesel Dually]

I guess the line of work I've been in for the last 14 years and my EE degree must be useless...

 

[kchristopher]

Originally posted by Diesel Dually

I guess the line of work I've been in for the last 14 years and my EE degree must be useless...

Probably doing you more good than an english major though.

 

[John]

Originally posted by jwilliams3

Diesel B59,

Common Rail is not the only feature that suppresses the sound of the new ECHO.

There are many features, this is a new engine not just an improved ISB.

I had read that a major sound reduction was found with the very nature of the specific type of fuel introduction to the combustion chamber. A small amount of the total fuel charge is introduced JUST prior to the remainder of the fuel charge thereby substantially reducing the loud Diesel knock.



ya gotta love hi tech!

 

[jwilliams3]

If I remember correctly,

it is 3 shots, first called a pilot (the small shot), 2nd Main (the big one), 3rd follow up (not sure on the exact name).

 

[GFoley]

After scrolling through all of this thread I have determined that it will sound like a Ford.

 

[TPCDrafting]

Can we order them with the 6" stacks? Pulled up next to a Duralax at the feed store, I said "it sure is quieter than mine!" the guy smiled and said "your right". I smiled bigger and said "you know that diesels producing more noise typically produce more power?" He quit smiling and hopped (down) into his truck and left. :{ :{

 

[Braveair78]

New ISB2 sound levels

A reduction in 9-10Db goes as follows:

A 3Db reduction in sound level is 1/2 as loud

A 6Db reduction in sound level is 1/4 as loud

A 9Db reduction in sound level is 1/8 as loud

and 10Db is a 10 times... this new engine is

basically ten times quieter than the old one.

 

[RKohn]

Last summer at the Thunder in Muncie...

the marketing idiots from Cummins had a survey that asked opinions about quieter engines... I asked'em why they thought anybody would wanna buy one.







Apparently they wrote it down wrong. Oo.

 

[RonaldLarson]

Echo name source?

I'd bet that Cummins used the international phonetic alphabet to name the new engine. It is the "E" model of the ISB, and "echo" is the phonetic word for letter "E". Let's hope the "F" model is not called "foxtrot", I like ECHO!

Ron

 

[BillGotthelf]

In my old age (47) I find that the less noise my ride makes the less people expect it to do. You should see the dura and strokes faces.

 

[FDNYMOPARGUY]

noise level

BE PROUD!

KEEP 'EM LOUD!

 

[dseabaugh]

echo

Hmmm..... Echo. Sounds like a cheap chainsaw to me. Does that me we have to crank it till it gets warm to start it and when it gets hot it quits or that it screams away at 15,000 rpms?