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by Dorian Houser and James Finneran (e.g., Firineran et al., understand these. A good acoustician should understand. I
2018). Finally, in the early 1990s (encouraged by Dennis calm myselfby thinking “maybe I can help with anatomy.”
McFadden and others), we got the first funding to look at
temporary threshold shift (TTS) in dolphins and belugas. What do you want to accomplish within the next 10 years
or before retirement?
This is the story. In 1995, I was in Washington, DC, and Kim I agreed to do a book called the Brains ofDolphins. I also
DePaul of the Navy Environmental Oflice took me over to agreed on two book chapters. I hope to revise my old book
one of the Program Executive Oflicers who had a pending Mammals ofthe Sea: Biology and Medicine (Ridgway, 1972).
Environmental Impact Statement. Fortunately, I had my Also, Iwould like to do a sequel to Dolphin Doctor. And like
new 14-pound laptop (COMPAQ SLT/286). I set it up on all biologist and bioacoustics folks, there are observations
a conference table and completed the proposal right there still to publish. So that should take up 10 years!
(to paraphrase President Theodore Roosevelt: “If you have
them by the nuts, their hearts and minds will follow”). Tim R°‘°'°"°°s
Mdmde w“_a Navy "‘vi'_"“'“e“ml manage’ wh° helped Finneran, 1. 1., Mulsow, 1., 1ones, 11., Houser, D. 5., Aeeomnndo, A. w.,
iii°Ve the liieleet e1°nS- This fiinded lii°P°Se1 led t0 e hing nnd Ridgway, s. H. (2013). Non-nuditory, eleetrophysiologienlpotentinls
series of TTS tests to set safety criteria for marine mammal preceding dolphin biosonar click production. [animal of Comparative
sound exposure for many species by many investigators. PhY‘i"l"i’Y 1434» 271433-
Madsen, P. T., Carder, D. A., Bedholm, K., and Ridgway, S. H. (2005).
For me, the field leaped forward when the ASA gave Iames . . .
Porpoise clicks from a sperm whale nose_ Convergent evolution or
Fiiiiiemn 3 Hiint P°5td°Ct°F’e‘l Fel1°W5hil7— and he Jtiined Oiir 130 kHz pulses in toothed whale sonars? Bioaruuslirs 15, 195-266.
group 19 years ago, Mecormiek, 1. G., and Ridgway, s. H. (2019). History ofthe development
or nnesthesin for the dolphin: A quest to study n brain as large as man’s.
A ll ' l 119,11-21.
Wm” is ‘he H333" "‘i“""" »""""'” ‘V9’ "‘“'l”i  G., Wever, E. G., Pnlin, 1., and Ridgwny, s. H. (1970).
In acoustics. my biggest mistake was to miss the high-fre- Sound conduction in the dolphin ear. The [ournal u]lheAruusliraISuci-
quency narrowband pulses emitted by Dall porpoises. I had ety 0f/tmeiim 48, 1418-1428-
some of these interesting animals from 1964 to 1966 but pub- Ridgwall’ 5'’ Dibble’ D" S" val.‘ Amllne’ K" and Price’  @015)" on dgng
_ two things at once: Dolphin brain nnd nose coordinate sonnr clicks,
iished 310W-fieiliieiiCY Senegieiii that ePliei'ent1Y ieeeided buzzes and emotionnl squeals with soeinl sounds during itsh capture.
only the envelope. Now we know that all porpoises (family Iuurnal ujExpevimentalBiulug)/Z18, 3987-3995.
phoCoemdae)_ including Dan Po,-l,,,i§es_ Pmduce Very shor‘ Ridgway, 5. 1-1. (1955). Medical care ofmarine mnmmnls. Iuurnal of the
(50_ms) narrowband Pulses Centered at frequencies over 100 Amevican Veterinary Medical Association 147, 1077-1085.
_ _ Ridgway, 5.1-1. (1972). Mammals ofthe Sea: Biology and Medicine. Thomas,
kHz. But I learned from the Dall porpoise mistake. When 5p,5ngfie1d_H__
Don Cartier and I went to Baltimore, MD, to test the hear- Ridgway, S. 1-1. (1987). The Dolphin Doctor: A Pioneeving Veterinavian
mg of a Pygmy sperm Wham we were Prepared‘ we were I‘:eml::il]7:)er; E]\;I:Pt;auvdinary Dolphin Thatlnspived His Career. Yankee
5'"i’"-sed ‘° find ‘hat this lime whale C°“ld “Ch°l°““e “l'“°5‘ Rillgwsiy,  iillland cnrder, D. A. (2001). Assessing hearing and sound
e°iitin“°“51Y With high-fie<1iieiieY neiiewhend Clicks Similar Production in cetaceans not available (or behavioral audiograms: Expe-
to the porpoises. It had hearing sensitivity to match its clicks riences with sperm, pygmy sperm, and gray whales. Aquatic Mammals
(Ridgway and Cartier, 2001; Madsen et al., 2005). Z_7’ 267'276'
Ridgway, s. H., Carlin, K. P., and Van Alstyne, K. R. (2019). Delphinid
brain development from neonnte to adulthood with comparisons to other
What advice do you have for budding acousticians? cetaceans and aniodactyls. Marine Mammal Science 34, 420-439.
Learn math and how to calibrate instrumentation needed in Wever, E- G-, McCormick, I. G-, Palin, 1-, and RMEWHY» 5- H- (1971)-
‘he field The eoehlen of the dolphin, Tursiups lvuncalus: General morphology.
‘ Proceedings ojtlie National Academy oj Sciences ofthe United States of
Amevica 68, 2381-2385.
Have you ever experienced imposter syndrome? How did wood, F. G. (1973). MarineMarnrnals and Man: The Navy’: Purpoises and
you dad with that ifs“; Sea Lions. Robert B. Luce,, Washington DC, 1.). 172.
I . . . wright, A. K., Titeilmnnn, 11. 1., Ridgway, s. H., and Scadeng, M. (24117).
Yes, I experience imposter syndrome every time I at . . . .
_ _ Diffusion tractography reveals pervasive nsymmetry oi cerebral white
“in ASA meeting and the Presenter Starts Showing Cniiililex mnttertrnets inthe bottlenose dolphin (Tuvsiups tmnralus). Brain smir-
equations. (Bill Schevill called this “sheet music.”) I do not um and Function 223, 1697-1711.
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