Does Military Sonar Kill Marine Wildlife? (2009)
scientificamerican.com
Does Military Sonar Kill Marine Wildlife? (2009)
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Re: Does Military Sonar Kill Marine Wildlife? (2009)
#2Re: Does Military Sonar Kill Marine Wildlife? (2009)
#3https://en.wikipedia.org/wiki/Betteridge%27s_law_of_headline...
You could reflexively post that, or you could read the article, which provides some evidence that the answer seems to range from "possibly", to "yes". It's tempting to just link to Betteridge's Law and move on, but it's not universal, and sometimes piece is legitimately presented as reviewing the evidence of some topic.
Personally, I think this is actually a useful conceit when considering something like this (which I believe I've actually seen on HN multiple times in the past) where a connection is being made that perhaps one had never considered before.
Re: Does Military Sonar Kill Marine Wildlife? (2009)
#4https://en.wikipedia.org/wiki/Betteridge%27s_law_of_headline...
You could reflexively post that, or you could read the article, which provides some evidence that the answer seems to range from "possibly", to "yes". It's tempting to just link to Betteridge's Law and move on, but it's not universal, and sometimes piece is legitimately presented as reviewing the evidence of some topic. Personally, I think this is actually a useful conceit when considering something like this (which…
Thanks for your reply. I almost didn't read it despite the publisher being Scientific American.
can confirm the article seems to lean heavily towards a "Yea"
Re: Does Military Sonar Kill Marine Wildlife? (2009)
#5Why can the military not just use a different frequency that animals can't hear? This whole thing sounds like a classic human failure; its under water, we can't see it, who cares. The same goes for green house gases and allowing oil companies to mess up countries like Nigeria.
Re: Does Military Sonar Kill Marine Wildlife? (2009)
#6Why can the military not just use a different frequency that animals can't hear? This whole thing sounds like a classic human failure; its under water, we can't see it, who cares. The same goes for green house gases and allowing oil companies to mess up countries like Nigeria.
In this case, it isn't the frequency that is the killer so much as the decibel level. High frequency or low frequency, 235 Db is a lot of energy being emmitted. In addition, the higher frequency of the sonar, the more quickly the sound tends to attenuate, which is why the lower and medium frequencies work best for those sensors.
Re: Does Military Sonar Kill Marine Wildlife? (2009)
#7Why can the military not just use a different frequency that animals can't hear? This whole thing sounds like a classic human failure; its under water, we can't see it, who cares. The same goes for green house gases and allowing oil companies to mess up countries like Nigeria.
In this case, it isn't the frequency that is the killer so much as the decibel level. High frequency or low frequency, 235 Db is a lot of energy being emmitted. In addition, the higher frequency of the sonar, the more quickly the sound tends to attenuate, which is why the lower and medium frequencies work best for those sensors.
The weird part, though, is that I can't find any articles about how such sounds might affect other things.
Like, what if a team of SCUBA divers had these high powered megawatt level infra-sound transducers aimed directly at them, and felt the brunt of such a wavefront at close range?
Would they even hear it, or maybe just feel it? Would they get a concussion? Would it shake them so violently that maybe they suffer massive full-body bruising, and even hemorrhaging or worse?
This is the part that seems unclear. How do these noises compare to something like the shockwave of a depth charge, in terms of energy imparted on other objects suspended in proximity? What happens to, oh I dunno, fine structured ballistics gel replicas of sensitive organs?
Re: Does Military Sonar Kill Marine Wildlife? (2009)
#8Earlier quoted context omitted.
In this case, it isn't the frequency that is the killer so much as the decibel level. High frequency or low frequency, 235 Db is a lot of energy being emmitted. In addition, the higher frequency of the sonar, the more quickly the sound tends to attenuate, which is why the lower and medium frequencies work best for those sensors.
The weird part, though, is that I can't find any articles about how such sounds might affect other things. Like, what if a team of SCUBA divers had these high powered megawatt level infra-sound transducers aimed directly at them, and felt the brunt of such a wavefront at close range? Would they even hear it, or maybe just feel it? Would they get a concussion? Would it shake them so violently that maybe they suffer ma…
Having spoken with Navy divers on thia issue, it could range from unpleasent to fatal depending on how loud the active is, and distance from the transducer. Before a dive, verifing that no ships nearby were planning on transmitting was a required safety precaution. Someone smarter than me could probably figure out what dB level actually causes internal damage.
Re: Does Military Sonar Kill Marine Wildlife? (2009)
#9Earlier quoted context omitted.
The weird part, though, is that I can't find any articles about how such sounds might affect other things. Like, what if a team of SCUBA divers had these high powered megawatt level infra-sound transducers aimed directly at them, and felt the brunt of such a wavefront at close range? Would they even hear it, or maybe just feel it? Would they get a concussion? Would it shake them so violently that maybe they suffer ma…
Having spoken with Navy divers on thia issue, it could range from unpleasent to fatal depending on how loud the active is, and distance from the transducer. Before a dive, verifing that no ships nearby were planning on transmitting was a required safety precaution. Someone smarter than me could probably figure out what dB level actually causes internal damage.
A cursory google search gives the number 170dB as potentially fatal. [0]
[0] https://www.reddit.com/r/NoStupidQuestions/comments/30xga2/i...
Re: Does Military Sonar Kill Marine Wildlife? (2009)
#10Yes