I can tell you that my ears thinks the Stella barrel is a lot quieter.
I guess we will have to see.
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I can tell you that my ears thinks the Stella barrel is a lot quieter.
I guess we will have to see.
Interesting. Do you think the meter was doing short-interval averaging (perhaps due to a slow FFT algorithm), or do you suspect it was more a psychological ramp-up, ramp-down type of effect?
I'm always leery of trusting black-box measurement equipment for transient phenomena, but admittedly don't know how sound dB meters work.
I am not too sure about the meter, it was one we got from PMI when we merged to form KEE, and it didn't come with any instructions. I believe it was just giving us the peak DB value.
I believe Jack Wood mentioned that about the perceived loudness of a marker has more to do with the length of the burst than the actual volume. Was in a thread on PBN a couple years ago during a discussion about his work refining the Ego's sound signature on the 10 or 11 if I'm remembering correctly.
Pretty sure lurker mentioned it in his LV1 tech video too
Yeah but he's never measured it himself, just repeating what he's heard.
I wonder if anyone took into account the frequency response of the human ear in their testing. For eyes there's something called the luminosity function which describes the eye's response vs. wavelength:
http://en.wikipedia.org/wiki/Luminosity_function
Apparently there's a similar phenomenon for ears described by the "equal loudness contour" and "absolute threshold of hearing".
http://en.wikipedia.org/wiki/Equal-loudness_contour
http://en.wikipedia.org/wiki/Absolut...old_of_hearing
So i got a peak DB meter. I plan on hooking that up in conjunction with a mic to record the sound wave profile for each shot. I'll do a few tests today/tomorrow and do the full video later this week.
Sounds good. Got links to the unit you picked up?
http://en.wikipedia.org/wiki/Psychoacoustics
Specifically, applying A-weighting to your direct measurement will give you a better idea of perceived loudness from the recorded spectrum.
http://en.wikipedia.org/wiki/A-weighting
Leading edge effect stuff *IS* more anecdotal but if you look into precedence effect you can see the localization is most strongly affected by the initial event.
The simplistic explanation for the length of burst stuff is just dP/dt
I got http://www.frys.com/product/6344191
Nothing too fancy just wanted to see peak db with a standard mic recording the waves
*edit* Just looked this model already does the A weight built in.