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Dbitua I-y | Iozef I. Zwislocki | 1922-2018
' g« Iozef I. Zwislocki was born on scaling of sensory magnitudes, both for the auditory system
I;_‘ ’ ‘ March 19, 1922, in Lwow, Po- and other sensory systems; forward masking; just-noticeable
v I t _7, land, and passed away on May differences in sound intensity; central masking; and tempo-
‘ , *' 14, 2018, in Fayetteville, NY. He ral summation.
/_ . . .
:4’ was a_ Dmlngulshefi Professor Zwislocki searched for global interrelationships among psy-
_ ' Emeritus of Neuroscience at Syr- Ch h . 1 Ch . . Ch 1 in . d
_ U _ _ S mm“ NY a op ysica aractenstics su as ou ess, masking, an
~, “use mverslty‘ Y _ ‘ _ ‘ differential sensitivity, and their relationship to underlying
fellow of the Acoustical Society . . .
_ neurophysiological mechanisms. He advanced our knowl-
V of America (ASA), and a mem- . . . .
» i _ _ edge of middle ear dynamics, using modeling and measure-
ber of the United States National . . . .
_ _ _ ments, and developing new instrumentation as required to
Academy of Sciences and the Polish Academy of Sciences. . . . .
_ _ _ V V unprove our understanding of middle ear sound transmis-
His large list of awards includes the first Bekesy Medal from . .
_ _ _ sion and the effects of pathology. He performed studies of
the ASA and the Award of Merit from the Association for . .
_ _ _, _ _ the stapedius muscle reflex both for its own sake and to ana-
Research m Otolaryngology Zwlslockls wlde-ranging Career 1 what this reflex implied about processin in the central
focused on an integrative approach involving engineering, YR . . g
_ _ _ _ _ nervous system. His work resulted in more than 200 peer-
Psychophyslcs’ 1-Rump hysmlogy‘ education’ and mvemlon reviewed publications and numerous inventions, including
to advance our understanding of the auditory system and the (A . . ,, .
_ _ the Zwislockl coupler. In his later years, he developed the
brain. His early years were shaped by the events of World . . . . .
_ V _ _ _ Zwislockl ear muffler (ZEM), a passive acoustic device that
War II (his grandfather, Ignacy Moscicki, was the President h . . . . . .
e anticipated would significantly reduce noise-induced
of Poland from 1926 to 1939). hearing loss
In 1948, Zwislocki emerged on the scientific scene with his Zwislocki loved skiing 5ai_1ing_ trout fi5},j_r,gV horseback rid.
doctoral dissertation “Theory of Cochlear Mechanics: Quali- rngV mdV of course_ his wife of25 yum Marie Zwi§1oCki_ who
tative and Quantitative Analysis” at the Federal Institute of Survives him_
Technology, in Zurich, Switzerland. The dissertation pro- V r V
. . . Selected Articles by Iozef]. Zwtslockx
vided the first mathematical explanation for cochlear travel- Z . . . .
_ _ _ _ _ _ wislockl, 1. 1. (1954:). Theory oftempoml audltorysummation. The Ioumal
Lng waves. Recognition for this work led to positions at the uf¢;,eA,,,,,“,-ml gm-gry ,,fA,,,_,,,,-M 32V m45_m50_
University of Basel, Switzerland, and Harvard University, Zwislncki, I. I. (1002). Auditury Smmd Transmissiun; An Autulziugraphiml
Cambridge, MA. In 1958, Zwislocki moved to Syracuse Uni- ZP”_”‘lP:u‘_"’”- L- Asswiaxs, 1;]. L P he h I
versity. There, in 1973, he founded the Institute for Sensory r]rSVI'r\rewY0XkE]’:rSYa_ry mmmmm 0'" am 0', W P Wu
Research (ISR), a research center dedicated to the discovery Zwislocki, I. 1., and Goodman, D. A. (1984)). Absolute scaling of sensory
and application of knowledge of the sensory systems and to mf*E“i“fd€S= A"31id3‘i°n- P””"P“"" 5‘P575h"PhYSié 18,18-38. _ _
the education of a new class of brain scientists who integrate  
the engineering and life sciences. Ammm 79_ 772_7w_
'lcki...,dIG ,.. . 'l b : 'blef-
Throughout his career, Zwislocki refined his theory of co- Z2: 2“ frelqilefrxcly ,m:::yS  esgpnm e
chlear mechanics, modifying his model as new data became  
available and performing his own physiological experiments Written by:
to test novel hypotheses. His contributions spanned the Robert L_ Smith
revolution in our understanding of cochlear mechanics, go- Email:
ing from the passive broadly tuned cochlea observed by von Syracuse University, Syracuse, NY
Békésy in dead cochleas to the active sharply tuned response Monita Chatterjee
now known to be present in healthy cochleas, including the Email:
role of the tectorial membrane and outer hair cells in cochle- Boys Town National Research Hospital, Omaha, NE
ar frequency selectivity. His psychophysical studies included  
74 1 Acuulclcl Tbday 1 Spring 2019

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