Posts Tagged ‘Fart science’

Fartalyzer Prototype

Thursday, November 5th, 2009

Inspired by breathalyzer technology, two college students at Cornell University have devised a fart detection device that measures three key fart variables: smell, sound and temperature.  Robert Clain and Miguel Silas recently presented the device in their class, and got a very nice write up on the Popular Science website.

The Real Fart Machine???

The Real Fart Machine???

I’m very happy for these guys, and proud of their work.  This is a great start.  Other fart attributes I’d like to see  measured in the future are top speed, SBD Ratio, density, and half-life.  While these shouldn’t need an explanation to most true fart fans and connisseurs, I’m doing this in the interest of education of the masses.
  • Top Speed – The article in Popular Science implies that temperature of the fart is the only factor in how fast a fart will travel.  That is blatant over-simplification.  Other internal factors include the thrust of the fart, the chemical compisition, and the downright bad intent of the farter.  External factors, include room temperature (a hot environment will lead to faster spreading), humidity (high humidity will slow down the spread of a fart), and barometric pressure (don’t ask me what the hell this is, but I just hear about it on the weather report along with temperature and humidity, so figure it sounds good here).  Other external factors that impact fart speed include whether the farter was stationary or moving (and if so, how fast and whether they were going forwards or backwards), if there was any “top-spin” or “side-spin” on the fart, and how much wafting (if any) is done by either the farter, or the victims.
  • SBD (Silent but Deadly) Ratio – pretty self-explanitory, really.  This is a ratio of the stench to the volume.   SBD ratios of greater than .83 are considered very rare, but have been recorded in labratory conditions.
  • Density – We’ve all experienced some farts that just seem “denser” than others.  Lots of farts smell bad, but a precious few can make the victim feel suffocated.  That is the quality of density as experienced by the victim…suffocation.
  • Half-Life – How long does the fart linger?  How quickly does it dissipate?  Again, some farts seem to linger forever, others dissipate rather quickly as pointed out by Warden Norton in “Shawshank Redemption” when he discovered Tim Robbins character had escaped “like a fart in the wind”.

Those are a few new features that can perhaps be added in Fartalyzer 2.0 by our boys from Cornell.  But, for now, they have already performed groundbreaking work in the field of windbreaking.  Thanks fellas!

The Fart Equation

Saturday, October 24th, 2009

Dear Dr. Rex: Well, I’ve been a fart fan for decades now, even got my girlfriend a little interested. My question is, why are some farts just big wind-bag blow-outs and some are more musical than an entire orchestra, and more pleasing to the ear, if not the nose?-Steve

Dear Steve: Decades, huh???? Cool……Steve, farts are like snowflakes. You can classify them, but in reality, no two are exactly alike (although the “holy shit I really should have had dinner before my hot date with the best looking girl I ever met” fart is pretty similar to the “holy shit I really should have had breakfast before my huge interview for the best job I’ll ever have a chance to get” fart).

There are many reasons for the varieties in pitch, volume, duration, texture, odor, mass, specific weight, combustibility, and raunchiness. I will explain. Of the many qualities listed above, we can really break any fart down into 2 major components. These are sound and smell. The general relationship between these 2 components can be expressed in the following basic equation:

XD/V=S

What this shows us is that as the volume of a fart goes up, the smell will usually decrease. The factors impacting that relationship are the duration of the fart and the other X variables. This basic relationship is really quite simple. The noise a fart makes (what we are referring to as volume) occurs as a result of the butt-cheeks slapping violently together. They are slapping together because the air being emitted is being emitted with great force. The faster and harder they slap, the louder the fart. This is perhaps easier to understand if we look at the inverse scenario: the dreaded SBD!!!!

In this equation, we use D=Duration, V=Volume and S=Smell, X=a Variable which is a function of what you have eaten within the past 48 hours, how much sleep you have had, various stress factors, and whether something has actually crawled up your ass recently and died (if something has crawled up your ass and died, we use the formula AXD/V=S where A=the thing that has crawled up your ass and how long ago it died).

The SBD (everybody knows this stands for Silent But Deadly) and its not-too-distant cousin, the SBV (Silent But Violent), are the smelliest farts known to man. The reason for this is that the gasses in an SPD/SPV are not expelled with great force at all, rather, they are leaked out like a small hole in a bicycle tire. Therefore, there is no butt-cheek slapping and no volume. Because of this lack of pressure, the aperture (asshole, asshole) remains open for a longer period of time, allowing the meandering methane (the slowest, stinkiest of all the inert fart gasses) to escape into the earth’s atmosphere.

In sum, when more pressure is exerted, there is more volume achieved. There is also less time for slow stinky gasses to crawl out of the butt and into your nostrils. I hope this was not too technical, but after all, I am the fart doctor.

Farts & Global Warming

Thursday, October 22nd, 2009

There has been much debate about the role of farts and climate change. Nobody talks much about human farts…it’s the cow-farts everybody seems to be focusing on.

British economist Nicholas Stern is considered by many to be an authority on climate change, and he advocates vegeterain diets for everybody. By going veggie, the argument is that there will be fewer cows on the planet releasing methane into the atmosphere with their farts. According to studies, every cc of methane released into the environment has as much impact as 23 cc’s of CO2.

It’s definitely a touchy subject…touchy and smelly.

I, for one, like a good cheeseburger. And, without cows, a cheeseburger would just be a hamburger bun. Going vegetarian is pretty radical for most of us. While it can be argued that radical times call for radical measures, most people probably just don’t want to change.

Whether it’s the car you drive, the food you eat, or just enjoying silly traditions like Christmas lights, or putting tons of gift-wrapping on birthday presents, most of us do things regularly that are probably bad for the environment.

Bummer, huh?