The ocean threat you've never heard of, but Trump made easier

[n2doc]

BY CHAD NELSEN

We recently celebrated World Oceans Day, which honors the incredible universe below the sea. But today, our oceans are in grave danger.

The Trump administration wants to expand seismic blasting and offshore drilling, wreaking havoc on our seas and jeopardizing coastal economies.

Seismic blasting is a violent, destructive part of offshore drilling. To find new oil reserves, ships tow large air guns along the surface of the ocean, blasting ultra high-volume sound waves down to the ocean floor, destroying or damaging sea life.

Blasts are emitted about every 10 seconds, 24 hours a day. Testing can last for weeks and be heard for hundreds of miles.

A typical rock concert is about 120 decibels. The volume of seismic blasts is about twice that — ranging from 200 to 260 decibels. That’s loud enough to burst the human eardrum.

more
http://thehill.com/blogs/pundits-blog/energy-environment/337446-seismic-blasting-the-ocean-threat-youve-never-heard-of

[femmocrat]

1. There is a special corner of hell reserved for him and his ilk.

I can't prove it, but I know it's true.

[pbmus]

2. If there was a way to express utter disgust at this practice which

Kills so many sea life, whales porpoise, fish, turtles....I know there is a very special place in hell for these people...

[jmowreader]

3. Decibels are logarithmic, not linear

"Twice as loud" is a 10 decibel increase. 195 dB is enough to KILL a human exposed to it; I cannot imagine being exposed to 260 dB.

A 140 dB increase is roughly equivalent to Jimi Hendrix unplugging from his Marshall and plugging straight into Grand Coulee Dam. (A 60 dB increase requires 1 million times the amount of amplifier power to accomplish.)

[eppur_se_muova]

4. Actually, ten times the SPL is 20 dB, so 10 dB would be a factor of 3.162.

https://en.wikipedia.org/wiki/Decibel#Acoustics

10 dB more requires 10 times as much power (yeah, the two definitions are a little confusing).