User talk:Mccluremr

re "Sorry Thunderbird2, but the Versluis article cited here reports a noise level of up to 210 dB for Alpheus heterochaelis": True, but I still don't believe it. Versluis et al quote 190 dB from Au & Banks, which is OK (although this is a peak to peak level which needs to be adjusted before it can be compared with sound pressure level). But 210 dB does not sound likely and I suspect a misunderstanding somewhere. I will try to find a copy of their Ref 6, on the basis of which this claim is made.

Regardless of what I find, thanks for pointing out the Versluis claim.

Thunderbird2 18:59, 21 May 2007 (UTC)


 * Concerning the 210 dB claim, Versluis actually cites this to: B. Schmitz, in The Crustacean Nervous System, K. Wiese, Ed. (Springer-Verlag, Berlin, in press). The Au & Banks value is also supported by e.g. Ferguson and Cleary (2001), J. Acoust. Soc Am. 109 (6) 3031-3037, who report a median peak-to-peak source level of 187 dB re 1 uPa for 1000 snaps. Hal peridol 12:34, 22 May 2007 (UTC)

I think I see now where the confusion arises. The measurements of Versluis et al are very close (a few cm) to the snapping claw. It's not surprising the peak pressure recorded there is higher than at 1 m. I think this point needs to be clarified so that we can compare like with like (assuming spherical spreading, there's a reduction of nearly 30 dB from 3 cm to 1 m). If no one objects I will compose something to this effect Thunderbird2 15:40, 24 May 2007 (UTC)